89 results on '"Malinee Chittaganpitch"'
Search Results
2. Enhanced surveillance for severe pneumonia, Thailand 2010–2015
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Charatdao Bunthi, Henry C. Baggett, Christopher J. Gregory, Somsak Thamthitiwat, Thitipong Yingyong, Wantana Paveenkittiporn, Anusak Kerdsin, Malinee Chittaganpitch, Ruchira Ruangchira-urai, Pasakorn Akarasewi, and Kumnuan Ungchusak
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Community-acquired pneumonia ,CAP ,Severe pneumonia ,Surveillance ,Global health security ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The etiology of severe pneumonia is frequently not identified by routine disease surveillance in Thailand. Since 2010, the Thailand Ministry of Public Health (MOPH) and US CDC have conducted surveillance to detect known and new etiologies of severe pneumonia. Methods Surveillance for severe community-acquired pneumonia was initiated in December 2010 among 30 hospitals in 17 provinces covering all regions of Thailand. Interlinked clinical, laboratory, pathological and epidemiological components of the network were created with specialized guidelines for each to aid case investigation and notification. Severe pneumonia was defined as chest-radiograph confirmed pneumonia of unknown etiology in a patient hospitalized ≤48 h and requiring intubation with ventilator support or who died within 48 h after hospitalization; patients with underlying chronic pulmonary or neurological disease were excluded. Respiratory and pathological specimens were tested by reverse transcription polymerase chain reaction for nine viruses, including Middle East Respiratory Syndrome Coronavirus (MERS-CoV), and 14 bacteria. Cases were reported via a secure web-based system. Results Of specimens from 972 cases available for testing during December 2010 through December 2015, 589 (60.6%) had a potential etiology identified; 399 (67.8%) were from children aged
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- 2019
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3. Global burden of influenza-associated lower respiratory tract infections and hospitalizations among adults: A systematic review and meta-analysis.
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Kathryn E Lafond, Rachael M Porter, Melissa J Whaley, Zhou Suizan, Zhang Ran, Mohammad Abdul Aleem, Binay Thapa, Borann Sar, Viviana Sotomayor Proschle, Zhibin Peng, Luzhao Feng, Daouda Coulibaly, Edith Nkwembe, Alfredo Olmedo, William Ampofo, Siddhartha Saha, Mandeep Chadha, Amalya Mangiri, Vivi Setiawaty, Sami Sheikh Ali, Sandra S Chaves, Dinagul Otorbaeva, Onechanh Keosavanh, Majd Saleh, Antonia Ho, Burmaa Alexander, Hicham Oumzil, Kedar Prasad Baral, Q Sue Huang, Adedeji A Adebayo, Idris Al-Abaidani, Marta von Horoch, Cheryl Cohen, Stefano Tempia, Vida Mmbaga, Malinee Chittaganpitch, Mariana Casal, Duc Anh Dang, Paula Couto, Harish Nair, Joseph S Bresee, Sonja J Olsen, Eduardo Azziz-Baumgartner, J Pekka Nuorti, Marc-Alain Widdowson, and Global Respiratory Hospitalizations–Influenza Proportion Positive (GRIPP) Working Group
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Medicine - Abstract
BackgroundInfluenza illness burden is substantial, particularly among young children, older adults, and those with underlying conditions. Initiatives are underway to develop better global estimates for influenza-associated hospitalizations and deaths. Knowledge gaps remain regarding the role of influenza viruses in severe respiratory disease and hospitalizations among adults, particularly in lower-income settings.Methods and findingsWe aggregated published data from a systematic review and unpublished data from surveillance platforms to generate global meta-analytic estimates for the proportion of acute respiratory hospitalizations associated with influenza viruses among adults. We searched 9 online databases (Medline, Embase, CINAHL, Cochrane Library, Scopus, Global Health, LILACS, WHOLIS, and CNKI; 1 January 1996-31 December 2016) to identify observational studies of influenza-associated hospitalizations in adults, and assessed eligible papers for bias using a simplified Newcastle-Ottawa scale for observational data. We applied meta-analytic proportions to global estimates of lower respiratory infections (LRIs) and hospitalizations from the Global Burden of Disease study in adults ≥20 years and by age groups (20-64 years and ≥65 years) to obtain the number of influenza-associated LRI episodes and hospitalizations for 2016. Data from 63 sources showed that influenza was associated with 14.1% (95% CI 12.1%-16.5%) of acute respiratory hospitalizations among all adults, with no significant differences by age group. The 63 data sources represent published observational studies (n = 28) and unpublished surveillance data (n = 35), from all World Health Organization regions (Africa, n = 8; Americas, n = 11; Eastern Mediterranean, n = 7; Europe, n = 8; Southeast Asia, n = 11; Western Pacific, n = 18). Data quality for published data sources was predominantly moderate or high (75%, n = 56/75). We estimate 32,126,000 (95% CI 20,484,000-46,129,000) influenza-associated LRI episodes and 5,678,000 (95% CI 3,205,000-9,432,000) LRI hospitalizations occur each year among adults. While adults ConclusionsIn this meta-analysis, we estimated that influenza viruses are associated with over 5 million hospitalizations worldwide per year. Inclusion of both published and unpublished findings allowed for increased power to generate stratified estimates, and improved representation from lower-income countries. Together, the available data demonstrate the importance of influenza viruses as a cause of severe disease and hospitalizations in younger and older adults worldwide.
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- 2021
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4. Global burden of acute lower respiratory infection associated with human metapneumovirus in children under 5 years in 2018: a systematic review and modelling study
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Xin Wang, PhD, You Li, PhD, Maria Deloria-Knoll, PhD, Shabir A Madhi, ProfPhD, Cheryl Cohen, MD, Asad Ali, MD, Sudha Basnet, ProfMD, Quique Bassat, ProfMD, W Abdullah Brooks, MD, Malinee Chittaganpitch, MSc, Marcela Echavarria, PhD, Rodrigo A Fasce, BSc, Doli Goswami, MSc, Siddhivinayak Hirve, PhD, Nusrat Homaira, PhD, Stephen R C Howie, PhD, Karen L Kotloff, ProfMD, Najwa Khuri-Bulos, ProfMD, Anand Krishnan, ProfMD, Marilla G Lucero, MD, Socorro Lupisan, MD, Ainara Mira-Iglesias, MSc, David P Moore, PhD, Cinta Moraleda, PhD, Marta Nunes, PhD, Histoshi Oshitani, ProfMD, Betty E Owor, PhD, Fernando P Polack, ProfMD, Katherine L O'Brien, ProfMD, Zeba A Rasmussen, MD, Barbara A Rath, ProfMD, Vahid Salimi, PhD, J Anthony G Scott, ProfFRCP, Eric A F Simões, ProfMD, Tor A Strand, ProfPhD, Donald M Thea, ProfMD, Florette K Treurnicht, PhD, Linda C Vaccari, MbChB, Lay-Myint Yoshida, ProfPhD, Heather J Zar, ProfPhD, Harry Campbell, ProfMD, Harish Nair, ProfPhD, Romina Libster, Grieven Otieno, Imane Joundi, Shobha Broor, Mark Nicol, Ritvik Amarchand, Ting Shi, F. Xavier López-Labrador, Julia M. Baker, Alexandra Jamison, Avinash Choudekar, Sanjay Juvekar, Patrick Obermeier, Brunhilde Schweiger, Lola Madrid, Elizabeth Thomas, Miguel Lanaspa, Hanna Nohynek, James Nokes, Marta Werner, Anh Danhg, Mandeep Chadha, Joan Puig-Barberà, Mauricio T. Caballero, Maria Mathisen, Sibongile Walaza, Orienka Hellferscee, Matt Laubscher, Melissa M. Higdon, Meredith Haddix, Pongpun Sawatwong, Henry C. Baggett, Phil Seidenberg, Lawrence Mwanayanda, Martin Antonio, Bernard E. Ebruke, Tanja Adams, Mustafizur Rahman, Mohammed Ziaur Rahman, Samboa O. Sow, Vicky L. Baillie, Lesley Workman, Michiko Toizumi, Milagritos D. Tapia, Thi hien anh Nguyen, and Susan Morpeth
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Public aspects of medicine ,RA1-1270 - Abstract
Summary: Background: Human metapneumovirus is a common virus associated with acute lower respiratory infections (ALRIs) in children. No global burden estimates are available for ALRIs associated with human metapneumovirus in children, and no licensed vaccines or drugs exist for human metapneumovirus infections. We aimed to estimate the age-stratified human metapneumovirus-associated ALRI global incidence, hospital admissions, and mortality burden in children younger than 5 years. Methods: We estimated the global burden of human metapneumovirus-associated ALRIs in children younger than 5 years from a systematic review of 119 studies published between Jan 1, 2001, and Dec 31, 2019, and a further 40 high quality unpublished studies. We assessed risk of bias using a modified Newcastle-Ottawa Scale. We estimated incidence, hospital admission rates, and in-hospital case-fatality ratios (hCFRs) of human metapneumovirus-associated ALRI using a generalised linear mixed model. We applied incidence and hospital admission rates of human metapneumovirus–associated ALRI to population estimates to yield the morbidity burden estimates by age bands and World Bank income levels. We also estimated human metapneumovirus-associated ALRI in-hospital deaths and overall human metapneumovirus-associated ALRI deaths (both in-hospital and non-hospital deaths). Additionally, we estimated human metapneumovirus-attributable ALRI cases, hospital admissions, and deaths by combining human metapneumovirus-associated burden estimates and attributable fractions of human metapneumovirus in laboratory-confirmed human metapneumovirus cases and deaths. Findings: In 2018, among children younger than 5 years globally, there were an estimated 14·2 million human metapneumovirus-associated ALRI cases (uncertainty range [UR] 10·2 million to 20·1 million), 643 000 human metapneumovirus-associated hospital admissions (UR 425 000 to 977 000), 7700 human metapneumovirus-associated in-hospital deaths (2600 to 48 800), and 16 100 overall (hospital and community) human metapneumovirus-associated ALRI deaths (5700 to 88 000). An estimated 11·1 million ALRI cases (UR 8·0 million to 15·7 million), 502 000 ALRI hospital admissions (UR 332 000 to 762 000), and 11 300 ALRI deaths (4000 to 61 600) could be causally attributed to human metapneumovirus in 2018. Around 58% of the hospital admissions were in infants under 12 months, and 64% of in-hospital deaths occurred in infants younger than 6 months, of which 79% occurred in low-income and lower-middle-income countries. Interpretation: Infants younger than 1 year have disproportionately high risks of severe human metapneumovirus infections across all World Bank income regions and all child mortality settings, similar to respiratory syncytial virus and influenza virus. Infants younger than 6 months in low-income and lower-middle-income countries are at greater risk of death from human metapneumovirus-associated ALRI than older children and those in upper-middle-income and high-income countries. Our mortality estimates demonstrate the importance of intervention strategies for infants across all settings, and warrant continued efforts to improve the outcome of human metapneumovirus-associated ALRI among young infants in low-income and lower-middle-income countries. Funding: Bill & Melinda Gates Foundation.
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- 2021
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5. Antibody responses induced by trivalent inactivated influenza vaccine among pregnant and non-pregnant women in Thailand: A matched cohort study.
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Sutthichai Nakphook, Jayanton Patumanond, Manash Shrestha, Kriengkrai Prasert, Malinee Chittaganpitch, Joshua A Mott, and Prabda Praphasiri
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Medicine ,Science - Abstract
BackgroundWe compared influenza antibody titers among vaccinated and unvaccinated pregnant and non-pregnant women.MethodsDuring 1st June- 30th September 2018, four groups of cohort participants-vaccinated pregnant, unvaccinated pregnant, vaccinated non-pregnant, and unvaccinated non-pregnant women were selected by matching age, gestational age, and the week of vaccination. Serum antibody titers against each strain of 2018 Southern Hemisphere inactivated trivalent influenza vaccine (IIV3) were assessed by hemagglutination inhibition (HI) assay on Day 0 (pre-vaccination) and Day 28 (one month post-vaccination) serum samples. Geometric mean titer (GMT), GMT ratio (GMR), seroconversion (defined as ≥4 fold increase in HI titer), and seroprotection (i.e. HI titer ≥1:40) were compared across the study groups using multilevel regression analyses, controlling for previous year vaccination from medical records and baseline antibody levels.ResultsA total of 132 participants were enrolled in the study (33 in each of the four study groups). The baseline GMTs for influenza A(H1N1), A(H3N2), and B vaccine strains were not significantly different among all four groups (all p-values >0.05). After one month, both vaccinated groups had significantly higher GMT, GMR, seroconversion, and seroprotection than their unvaccinated controls (all p-values 0.05).ConclusionsThe 2018 seasonal IIV3 was immunogenic against all three vaccine strains and pregnancy did not seem to alter the immune response to IIV3. These findings support the current influenza vaccination recommendations for pregnant women.
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- 2021
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6. Knowledge, attitude/perception, and practice related to seasonal influenza vaccination among caregivers of young Thai children: A cross-sectional study.
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Chareeya Thanee, Wanitchaya Kittikraisak, Chalinthorn Sinthuwattanawibool, Koonkoaw Roekworachai, Arunee Klinklom, Katesiree Kornsitthikul, Suwadee Jirasakpisarn, Ussanee Srirompotong, Malinee Chittaganpitch, Fatimah S Dawood, Piyarat Suntarattiwong, Joshua A Mott, and Tawee Chotpitayasunondh
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Medicine ,Science - Abstract
BackgroundSeasonal influenza vaccination uptake among young children in Thailand is low despite national recommendation for vaccination. We implemented a knowledge, attitude/perception, and practice survey to understand determinants of influenza vaccination in children aged six months to two years.MethodsUsing a cross-sectional design, we interviewed caregivers of 700 children in seven hospitals using a structured questionnaire to collect information on caregivers' and children's demographic characteristics, and caregivers' knowledge of influenza illness and national vaccine recommendation, attitude/perception toward influenza vaccine, and information sources. We verified children's influenza vaccination status against medical records (vaccinated vs. unvaccinated). Logistic regression was used to examine factors independently associated with children receiving influenza vaccination in the 2018 season using the dataset restricted to only children's parents. Variables associated with vaccination at p-value ≤0.20 were included in subsequent multivariable logistic models. Significant independent determinants of children's influenza vaccination and collinearity of covariates were assessed. The final model was constructed using a stepwise backward elimination approach with variables significant at p-value ResultsDuring August 2018-February 2019, 700 children's caregivers completed the questionnaire; 61 (9%) were caregivers of vaccinated children. Caregivers of the vaccinated children were statistically more likely to have higher education (61% vs. 38%; p-valueConclusionThe majority of caregivers of children in this study had knowledge of influenza illness and influenza vaccine. Caregivers reported various sources of information regarding influenza illness and the vaccine, but healthcare providers remained the most trusted source. Children's history of influenza vaccination in prior season(s) was the strongest determinant of children being vaccinated for influenza in the current season.
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- 2021
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7. Immune response to influenza vaccination in ESRD patients undergoing hemodialysis vs. hemodiafiltration.
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Arkom Nongnuch, Wattanachai Ngampongpan, Sirawat Srichatrapimuk, Artit Wongsa, Sutheera Thongpraphai, Chompunuch Boonarkart, Nutaporn Sanmeema, Malinee Chittaganpitch, Prasert Auewarakul, Boonrat Tassaneetrithep, Andrew Davenport, and Angsana Phuphuakrat
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Medicine ,Science - Abstract
BACKGROUND:On-line hemodiafiltration (HDF) clears more azotemic toxins compared to high-flux hemodialysis (HD). The response to vaccination is impaired in dialysis patients. We wished to determine whether the immune responses to influenza vaccine in dialysis patients treated by HDF were stronger than those treated by HD. MATERIALS AND METHODS:We conducted a prospective cohort study in chronic dialysis patients during the 2016 and 2017 influenza seasons. All participants received a single standard dose of trivalent influenza vaccine, and we studied the elicited humoral immune response by hemagglutination inhibition test, and cell-mediated immune response by enumeration of lymphocyte cellular markers and proliferation assays. RESULTS:We immunized 60 end-stage renal disease (ESRD) patients: 42 (70%) treated with HD and 18 patients (30%) with HDF. The median (interquartile range) age was 65.0 (55.0-74.5) years. All patients developed seroprotection to at least one influenza vaccine strain at one month post-vaccination, and did not differ between groups. By logistic regression, age was the only factor independently associated with seroconversion to all vaccine strains (odds ratio 0.89, 95% confidence interval 0.80-0.98; p = 0.022). Seroprotection to all vaccine strains was sustained for longer in patients treated with HDF, and the results remained the same after age adjustment. For cellular immune response, patients who seroconverted to all vaccine strains had higher CD38+ T cell subpopulations pre-vaccination. Patients treated by HDF had higher lymphocyte proliferation to circulating influenza A strains. CONCLUSIONS:Seroconversion to all influenza vaccine strains was associated with age. Patients treated with HDF demonstrated seroprotection was sustained for longer compared to those treated by HD and greater lymphocyte proliferation to circulating influenza A strains. These encouraging results for HDF require confirmation in a larger dialysis population. TRIAL REGISTRATION:ClinicalTrial.gov, NCT04122222.
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- 2020
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8. The epidemiology and estimated etiology of pathogens detected from the upper respiratory tract of adults with severe acute respiratory infections in multiple countries, 2014-2015.
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Jennifer Milucky, Tracy Pondo, Christopher J Gregory, Danielle Iuliano, Sandra S Chaves, John McCracken, Adel Mansour, Yuzhi Zhang, Mohammad Abdul Aleem, Bernard Wolff, Brett Whitaker, Toni Whistler, Clayton Onyango, Maria Renee Lopez, Na Liu, Mohammed Ziaur Rahman, Nong Shang, Jonas Winchell, Malinee Chittaganpitch, Barry Fields, Herberth Maldonado, Zhiping Xie, Stephen Lindstrom, Katherine Sturm-Ramirez, Joel Montgomery, Kai-Hui Wu, Chris A Van Beneden, and Adult TAC Working Group
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Medicine ,Science - Abstract
IntroductionEtiology studies of severe acute respiratory infections (SARI) in adults are limited. We studied potential etiologies of SARI among adults in six countries using multi-pathogen diagnostics.MethodsWe enrolled both adults with SARI (acute respiratory illness onset with fever and cough requiring hospitalization) and asymptomatic adults (adults hospitalized with non-infectious illnesses, non-household members accompanying SARI patients, adults enrolled from outpatient departments, and community members) in each country. Demographics, clinical data, and nasopharyngeal and oropharyngeal specimens were collected from both SARI patients and asymptomatic adults. Specimens were tested for presence of 29 pathogens utilizing the Taqman® Array Card platform. We applied a non-parametric Bayesian regression extension of a partially latent class model approach to estimate proportions of SARI caused by specific pathogens.ResultsWe enrolled 2,388 SARI patients and 1,135 asymptomatic adults from October 2013 through October 2015. We detected ≥1 pathogen in 76% of SARI patients and 67% of asymptomatic adults. Haemophilus influenzae and Streptococcus pneumoniae were most commonly detected (≥23% of SARI patients and asymptomatic adults). Through modeling, etiology was attributed to a pathogen in most SARI patients (range among countries: 57.3-93.2%); pathogens commonly attributed to SARI etiology included influenza A (14.4-54.4%), influenza B (1.9-19.1%), rhino/enterovirus (1.8-42.6%), and RSV (3.6-14.6%).ConclusionsUse of multi-pathogen diagnostics and modeling enabled attribution of etiology in most adult SARI patients, despite frequent detection of multiple pathogens in the upper respiratory tract. Seasonal flu vaccination and development of RSV vaccine would likely reduce the burden of SARI in these populations.
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- 2020
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9. Detecting Spread of Avian Influenza A(H7N9) Virus Beyond China
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Alexander J. Millman, Fiona Havers, A. Danielle Iuliano, C. Todd Davis, Borann Sar, Ly Sovann, Savuth Chin, Andrew L. Corwin, Phengta Vongphrachanh, Bounlom Douangngeun, Kim A. Lindblade, Malinee Chittaganpitch, Viriya Kaewthong, James C. Kile, Hien T. Nguyen, Dong V. Pham, Ruben O. Donis, and Marc-Alain Widdowson
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Influenza ,A(H7N9) ,A(H5N1) ,surveillance ,viruses ,China ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
During February 2013–March 2015, a total of 602 human cases of low pathogenic avian influenza A(H7N9) were reported; no autochthonous cases were reported outside mainland China. In contrast, since highly pathogenic avian influenza A(H5N1) reemerged during 2003 in China, 784 human cases in 16 countries and poultry outbreaks in 53 countries have been reported. Whether the absence of reported A(H7N9) outside mainland China represents lack of spread or lack of detection remains unclear. We compared epidemiologic and virologic features of A(H5N1) and A(H7N9) and used human and animal influenza surveillance data collected during April 2013–May 2014 from 4 Southeast Asia countries to assess the likelihood that A(H7N9) would have gone undetected during 2014. Surveillance in Vietnam and Cambodia detected human A(H5N1) cases; no A(H7N9) cases were detected in humans or poultry in Southeast Asia. Although we cannot rule out the possible spread of A(H7N9), substantial spread causing severe disease in humans is unlikely.
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- 2015
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10. Influenza seasonality and vaccination timing in tropical and subtropical areas of southern and south-eastern Asia
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Siddhartha Saha, Mandeep Chadha, Abdullah Al Mamun, Mahmudur Rahman, Katharine Sturm-Ramirez, Malinee Chittaganpitch, Sirima Pattamadilok, Sonja J Olsen, Ondri Dwi Sampurno, Vivi Setiawaty, Krisna Nur Andriana Pangesti, Gina Samaan, Sibounhom Archkhawongs, Phengta Vongphrachanh, Darouny Phonekeo, Andrew Corwin, Sok Touch, Philippe Buchy, Nora Chea, Paul Kitsutani, Le Quynh Mai, Vu Dinh Thiem, Raymond Lin, Constance Low, Chong Chee Kheong, Norizah Ismail, Mohd Apandi Yusof, Amado Tandoc III, Vito Roque Jr, Akhilesh Mishra, Ann C Moen, Marc-Alain Widdowson, Jeffrey Partridge, and Renu B Lal
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Public aspects of medicine ,RA1-1270 - Abstract
Objective To characterize influenza seasonality and identify the best time of the year for vaccination against influenza in tropical and subtropical countries of southern and south-eastern Asia that lie north of the equator. Methods Weekly influenza surveillance data for 2006 to 2011 were obtained from Bangladesh, Cambodia, India, Indonesia, the Lao People's Democratic Republic, Malaysia, the Philippines, Singapore, Thailand and Viet Nam. Weekly rates of influenza activity were based on the percentage of all nasopharyngeal samples collected during the year that tested positive for influenza virus or viral nucleic acid on any given week. Monthly positivity rates were then calculated to define annual peaks of influenza activity in each country and across countries. Findings Influenza activity peaked between June/July and October in seven countries, three of which showed a second peak in December to February. Countries closer to the equator had year-round circulation without discrete peaks. Viral types and subtypes varied from year to year but not across countries in a given year. The cumulative proportion of specimens that tested positive from June to November was > 60% in Bangladesh, Cambodia, India, the Lao People's Democratic Republic, the Philippines, Thailand and Viet Nam. Thus, these tropical and subtropical countries exhibited earlier influenza activity peaks than temperate climate countries north of the equator. Conclusion Most southern and south-eastern Asian countries lying north of the equator should consider vaccinating against influenza from April to June; countries near the equator without a distinct peak in influenza activity can base vaccination timing on local factors.
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- 2014
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11. Global Role and Burden of Influenza in Pediatric Respiratory Hospitalizations, 1982-2012: A Systematic Analysis.
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Kathryn E Lafond, Harish Nair, Mohammad Hafiz Rasooly, Fátima Valente, Robert Booy, Mahmudur Rahman, Paul Kitsutani, Hongjie Yu, Guiselle Guzman, Daouda Coulibaly, Julio Armero, Daddi Jima, Stephen R C Howie, William Ampofo, Ricardo Mena, Mandeep Chadha, Ondri Dwi Sampurno, Gideon O Emukule, Zuridin Nurmatov, Andrew Corwin, Jean Michel Heraud, Daniel E Noyola, Radu Cojocaru, Pagbajabyn Nymadawa, Amal Barakat, Adebayo Adedeji, Marta von Horoch, Remigio Olveda, Thierry Nyatanyi, Marietjie Venter, Vida Mmbaga, Malinee Chittaganpitch, Tran Hien Nguyen, Andros Theo, Melissa Whaley, Eduardo Azziz-Baumgartner, Joseph Bresee, Harry Campbell, Marc-Alain Widdowson, and Global Respiratory Hospitalizations—Influenza Proportion Positive (GRIPP) Working Group
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Medicine - Abstract
BACKGROUND:The global burden of pediatric severe respiratory illness is substantial, and influenza viruses contribute to this burden. Systematic surveillance and testing for influenza among hospitalized children has expanded globally over the past decade. However, only a fraction of the data has been used to estimate influenza burden. In this analysis, we use surveillance data to provide an estimate of influenza-associated hospitalizations among children worldwide. METHODS AND FINDINGS:We aggregated data from a systematic review (n = 108) and surveillance platforms (n = 37) to calculate a pooled estimate of the proportion of samples collected from children hospitalized with respiratory illnesses and positive for influenza by age group (
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- 2016
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12. Avian Influenza H5N1 Screening of Intensive Care Unit Patients with Community-acquired Pneumonia
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Anucha Apisarnthanarak, Pilaipan Puthavathana, Rungrueng Kitphati, Pranee Thavatsupha, Malinee Chittaganpitch, Prasert Auewarakul, and Linda M. Mundy
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avian influenza ,H5N1 ,screening ,cost estimate ,Thailand ,dispatch ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
From February 1, 2005, to January 31, 2006, we screened 115 adults for avian influenza (H5N1) and influenza A if admitted to an intensive care unit with pneumonia. Using reverse transcription-PCR, viral culture, and serologic testing for anti-H5 antibody, we identified 8 (7%) patients with influenza A (H3N2); none had H5N1. Estimated costs for H5N1 screening were $7,375.
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- 2006
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13. Atypical Avian Influenza (H5N1)
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Anucha Apisarnthanarak, Rungrueng Kitphati, Kanokporn Thongphubeth, Prisana Patoomanunt, Pimjai Anthanont, Wattana Auwanit, Pranee Thawatsupha, Malinee Chittaganpitch, Siriphan Saeng-Aroon, Sunthareeya Waicharoen, Piyaporn Apisarnthanarak, Gregory A. Storch, Linda M. Mundy, and Victoria J. Fraser
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Avian influenza ,influenza ,H5N1 ,healthcare workers ,unusual presentation ,Thailand ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
We report the first case of avian influenza in a patient with fever and diarrhea but no respiratory symptoms. Avian influenza should be included in the differential diagnosis for patients with predominantly gastrointestinal symptoms, particularly if they have a history of exposure to poultry.
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- 2004
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14. High rate of A(H1N1)pdm09 infections among rural Thai villagers, 2009-2010.
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Benjawan Khuntirat, In-Kyu Yoon, Malinee Chittaganpitch, Whitney S Krueger, Krongkaew Supawat, Patrick J Blair, Shannon D Putnam, Robert V Gibbons, Darunee Buddhari, Pathom Sawanpanyalert, Gary L Heil, John A Friary, and Gregory C Gray
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Medicine ,Science - Abstract
Pandemic influenza A(H1N1)pdm09 emerged in Thailand in 2009. A prospective longitudinal adult cohort and household transmission study of influenza-like illness (ILI) was ongoing in rural Thailand at the time of emergence. Symptomatic and subclinical A(H1N1)pdm09 infection rates in the cohort and among household members were evaluated.A cohort of 800 Thai adults underwent active community-based surveillance for ILI from 2008-2010. Acute respiratory samples from ILI episodes were tested for A(H1N1)pdm09 by qRT-PCR; acute and 60-day convalescent blood samples were tested by A(H1N1)pdm09 hemagglutination inhibition assay (HI). Enrollment, 12-month and 24-month follow-up blood samples were tested for A(H1N1)pdm09 seroconversion by HI. Household members of influenza A-infected cohort subjects with ILI were enrolled in household transmission investigations in which day 0 and 60 blood samples and acute respiratory samples were tested by either qRT-PCR or HI for A(H1N1)pdm09. Seroconversion between annual blood samples without A(H1N1)pdm09-positive ILI was considered as subclinical infection.The 2-yr cumulative incidence of A(H1N1)pdm09 infection in the cohort in 2009/2010 was 10.8% (84/781) with an annual incidence of 1.2% in 2009 and 9.7% in 2010; 83.3% of infections were subclinical (50% in 2009 and 85.9% in 2010). The 2-yr cumulative incidence was lowest (5%) in adults born ≤ 1957. The A(H1N1)pdm09 secondary attack rate among household contacts was 47.2% (17/36); 47.1% of these infections were subclinical. The highest A(H1N1)pdm09 secondary attack rate among household contacts (70.6%, 12/17) occurred among children born between 1990 and 2003.Subclinical A(H1N1)pdm09 infections in Thai adults occurred frequently and accounted for a greater proportion of all A(H1N1)pdm09 infections than previously estimated. The role of subclinical infections in A(H1N1)pdm09 transmission has important implications in formulating strategies to predict and prevent the spread of A(H1N1)pdm09 and other influenza virus strains.
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- 2014
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15. Screening Pneumonia Patients for Mimivirus
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Ryan K. Dare, Malinee Chittaganpitch, and Dean D. Erdman
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mimivirus ,pneumonia ,real-time PCR ,dispatch ,Thailand ,United States ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
Acanthamoeba polyphaga mimivirus (APM), a virus of free-living amebae, has reportedly caused human respiratory disease. Using 2 newly developed real-time PCR assays, we screened 496 respiratory specimens from 9 pneumonia-patient populations for APM. This virus was not detected in any specimen, which suggests it is not a common respiratory pathogen.
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- 2008
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16. Incidence and epidemiology of hospitalized influenza cases in rural Thailand during the influenza A (H1N1)pdm09 pandemic, 2009-2010.
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Henry C Baggett, Malinee Chittaganpitch, Somsak Thamthitiwat, Prabda Prapasiri, Sathapana Naorat, Pongpun Sawatwong, Darunee Ditsungnoen, Sonja J Olsen, James M Simmerman, Prasong Srisaengchai, Somrak Chantra, Leonard F Peruski, Pathom Sawanpanyalert, Susan A Maloney, and Pasakorn Akarasewi
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Medicine ,Science - Abstract
BACKGROUND: Data on the burden of the 2009 influenza pandemic in Asia are limited. Influenza A(H1N1)pdm09 was first reported in Thailand in May 2009. We assessed incidence and epidemiology of influenza-associated hospitalizations during 2009-2010. METHODS: We conducted active, population-based surveillance for hospitalized cases of acute lower respiratory infection (ALRI) in all 20 hospitals in two rural provinces. ALRI patients were sampled 1∶2 for participation in an etiology study in which nasopharyngeal swabs were collected for influenza virus testing by PCR. RESULTS: Of 7,207 patients tested, 902 (12.5%) were influenza-positive, including 190 (7.8%) of 2,436 children aged 75 years (407 per 100,000). The incidence of influenza A(H1N1)pdm09 was 62 per 100,000 (214 per 100,000 in children
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- 2012
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17. Human rhinovirus infections in rural Thailand: epidemiological evidence for rhinovirus as both pathogen and bystander.
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Alicia M Fry, Xiaoyan Lu, Sonja J Olsen, Malinee Chittaganpitch, Pongpun Sawatwong, Somrak Chantra, Henry C Baggett, and Dean Erdman
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Medicine ,Science - Abstract
BACKGROUND: We describe human rhinovirus (HRV) detections in SaKaeo province, Thailand. METHODS: From September 1, 2003-August 31, 2005, we tested hospitalized patients with acute lower respiratory illness and outpatient controls without fever or respiratory symptoms for HRVs with polymerase chain reaction and molecularly-typed select HRVs. We compared HRV detection among hospitalized patients and controls and estimated enrollment adjusted incidence. RESULTS: HRVs were detected in 315 (16%) of 1919 hospitalized patients and 27 (9.6%) of 280 controls. Children had the highest frequency of HRV detections (hospitalized:
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- 2011
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18. The burden of hospitalized lower respiratory tract infection due to respiratory syncytial virus in rural Thailand.
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Alicia M Fry, Malinee Chittaganpitch, Henry C Baggett, Teresa C T Peret, Ryan K Dare, Pongpun Sawatwong, Somsak Thamthitiwat, Peera Areerat, Wichai Sanasuttipun, Julie Fischer, Susan A Maloney, Dean D Erdman, and Sonja J Olsen
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Medicine ,Science - Abstract
BACKGROUND: We describe the epidemiology of hospitalized RSV infections for all age groups from population-based surveillance in two rural provinces in Thailand. METHODS: From September 1, 2003 through December 31, 2007, we enrolled hospitalized patients with acute lower respiratory tract illness, who had a chest radiograph ordered by the physician, from all hospitals in SaKaeo and Nakhom Phanom Provinces. We tested nasopharyngeal specimens for RSV with reverse transcriptase polymerase chain reaction (RT-PCR) assays and paired-sera from a subset of patients with IgG enzyme immunoassay. Rates were adjusted for enrollment. RESULTS: Among 11,097 enrolled patients, 987 (8.9%) had RSV infection. Rates of hospitalized RSV infection overall (and radiographically-confirmed pneumonia) were highest among children aged
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- 2010
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19. Incidence, seasonality and mortality associated with influenza pneumonia in Thailand: 2005-2008.
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James Mark Simmerman, Malinee Chittaganpitch, Jens Levy, Somrak Chantra, Susan Maloney, Timothy Uyeki, Peera Areerat, Somsak Thamthitiwat, Sonja J Olsen, Alicia Fry, Kumnuan Ungchusak, Henry C Baggett, and Supamit Chunsuttiwat
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Medicine ,Science - Abstract
BackgroundData on the incidence, seasonality and mortality associated with influenza in subtropical low and middle income countries are limited. Prospective data from multiple years are needed to develop vaccine policy and treatment guidelines, and improve pandemic preparedness.MethodsDuring January 2005 through December 2008, we used an active, population-based surveillance system to prospectively identify hospitalized pneumonia cases with influenza confirmed by reverse transcriptase-polymerase chain reaction or cell culture in 20 hospitals in two provinces in Thailand. Age-specific incidence was calculated and extrapolated to estimate national annual influenza pneumonia hospital admissions and in-hospital deaths.ResultsInfluenza was identified in 1,346 (10.4%) of pneumonia patients of all ages, and 10 influenza pneumonia patients died while in the hospital. 702 (52%) influenza pneumonia patients were less than 15 years of age. The average annual incidence of influenza pneumonia was greatest in children less than 5 years of age (236 per 100,000) and in those age 75 or older (375 per 100,000). During 2005, 2006 and 2008 influenza A virus detection among pneumonia cases peaked during June through October. In 2007 a sharp increase was observed during the months of January through April. Influenza B virus infections did not demonstrate a consistent seasonal pattern. Influenza pneumonia incidence was high in 2005, a year when influenza A(H3N2) subtype virus strains predominated, low in 2006 when A(H1N1) viruses were more common, moderate in 2007 when H3N2 and influenza B co-predominated, and high again in 2008 when influenza B viruses were most common. During 2005-2008, influenza pneumonia resulted in an estimated annual average 36,413 hospital admissions and 322 in-hospital pneumonia deaths in Thailand.ConclusionInfluenza virus infection is an important cause of hospitalized pneumonia in Thailand. Young children and the elderly are most affected and in-hospital deaths are more common than previously appreciated. Influenza occurs year-round and tends to follow a bimodal seasonal pattern with substantial variability. The disease burden varies significantly from year to year. Our findings support a recent Thailand Ministry of Public Health (MOPH) decision to extend annual influenza vaccination to older adults and suggest that children should also be targeted for routine vaccination.
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- 2009
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20. First Round of External Quality Assessment Scheme for SARS-CoV-2 Laboratories During the COVID-19 Pandemic in Thailand
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Siriphan Saeng-aroon, Don Changsom, Ratrawee Boonmuang, Sunthareeya Waicharoen, Kampaew Buayai, Pilailuk Okada, Ballang Uppapong, Malinee Chittaganpitch, Patravee Soisangwan, Prabda Praphasiri, and Beth A. Skaggs
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Health (social science) ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Emergency Medicine ,Management, Monitoring, Policy and Law ,Safety Research - Published
- 2023
21. Global burden of acute lower respiratory infection associated with human metapneumovirus in children under 5 years in 2018: a systematic review and modelling study
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Vahid Salimi, Mustafizur Rahman, Florette K. Treurnicht, Tanja Adams, Lola Madrid, Asad Ali, Shobha Broor, Maria Deloria-Knoll, Julia M Baker, Donald M. Thea, Sanjay Juvekar, Lesley Workman, J. Anthony G. Scott, Siddhivinayak Hirve, Malinee Chittaganpitch, Najwa Khuri-Bulos, Zeba A Rasmussen, Ting Shi, Thi hien anh Nguyen, Xin Wang, Marcela Echavarria, Barbara Rath, David P. Moore, Lay-Myint Yoshida, Sudha Basnet, Fernando P. Polack, Tor A. Strand, Melissa M. Higdon, Heather J. Zar, Mauricio T. Caballero, Miguel A. Lanaspa, Susan C. Morpeth, Hanna Nohynek, Doli Goswami, Grieven P. Otieno, Michiko Toizumi, Cheryl Cohen, Brunhilde Schweiger, Marilla G. Lucero, Phil Seidenberg, Samboa O. Sow, Maria Mathisen, Mohammed Ziaur Rahman, Henry C. Baggett, James Nokes, F. Xavier López-Labrador, Katherine L. O'Brien, Betty E Owor, Avinash Choudekar, Ritvik Amarchand, Anh Danhg, Imane Joundi, Harry Campbell, Meredith Haddix, Marta Werner, Ainara Mira-Iglesias, Karen L. Kotloff, Harish Nair, Lawrence Mwanayanda, Marta C. Nunes, Bernard E. Ebruke, Joan Puig-Barberà, You Li, Quique Bassat, Cinta Moraleda, Pongpun Sawatwong, Patrick Obermeier, Linda Cheyenne Vaccari, Elizabeth D. Thomas, W. Abdullah Brooks, Martin Antonio, Romina Libster, Stephen R. C. Howie, Mandeep S. Chadha, Socorro Lupisan, Orienka Hellferscee, Milagritos D. Tapia, Anand Krishnan, Alexandra Jamison, Eric A. F. Simões, Rodrigo Fasce, Sibongile Walaza, Mark P. Nicol, Nusrat Homaira, Histoshi Oshitani, Shabir A. Madhi, Matt Laubscher, Vicky L. Baillie, and Network, Respiratory Virus Global Epidemiology
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Male ,030231 tropical medicine ,Global Health ,Young infants ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Human metapneumovirus ,Cost of Illness ,Medicine ,Humans ,030212 general & internal medicine ,Lower respiratory infection ,Respiratory Tract Infections ,Paramyxoviridae Infections ,biology ,business.industry ,lcsh:Public aspects of medicine ,Incidence (epidemiology) ,Infant, Newborn ,Infant ,lcsh:RA1-1270 ,General Medicine ,Articles ,biology.organism_classification ,Child mortality ,Child, Preschool ,Acute Disease ,Income level ,Linear Models ,Female ,Risk of death ,Metapneumovirus ,business ,Demography - Abstract
Background Human metapneumovirus is a common virus associated with acute lower respiratory infections (ALRIs) in children. No global burden estimates are available for ALRIs associated with human metapneumovirus in children, and no licensed vaccines or drugs exist for human metapneumovirus infections. We aimed to estimate the age-stratified human metapneumovirus-associated ALRI global incidence, hospital admissions, and mortality burden in children younger than 5 years. Methods We estimated the global burden of human metapneumovirus-associated ALRIs in children younger than 5 years from a systematic review of 119 studies published between Jan 1, 2001, and Dec 31, 2019, and a further 40 high quality unpublished studies. We assessed risk of bias using a modified Newcastle-Ottawa Scale. We estimated incidence, hospital admission rates, and in-hospital case-fatality ratios (hCFRs) of human metapneumovirus-associated ALRI using a generalised linear mixed model. We applied incidence and hospital admission rates of human metapneumovirus–associated ALRI to population estimates to yield the morbidity burden estimates by age bands and World Bank income levels. We also estimated human metapneumovirus-associated ALRI in-hospital deaths and overall human metapneumovirus-associated ALRI deaths (both in-hospital and non-hospital deaths). Additionally, we estimated human metapneumovirus-attributable ALRI cases, hospital admissions, and deaths by combining human metapneumovirus-associated burden estimates and attributable fractions of human metapneumovirus in laboratory-confirmed human metapneumovirus cases and deaths. Findings In 2018, among children younger than 5 years globally, there were an estimated 14·2 million human metapneumovirus-associated ALRI cases (uncertainty range [UR] 10·2 million to 20·1 million), 643 000 human metapneumovirus-associated hospital admissions (UR 425 000 to 977 000), 7700 human metapneumovirus-associated in-hospital deaths (2600 to 48 800), and 16 100 overall (hospital and community) human metapneumovirus-associated ALRI deaths (5700 to 88 000). An estimated 11·1 million ALRI cases (UR 8·0 million to 15·7 million), 502 000 ALRI hospital admissions (UR 332 000 to 762 000), and 11 300 ALRI deaths (4000 to 61 600) could be causally attributed to human metapneumovirus in 2018. Around 58% of the hospital admissions were in infants under 12 months, and 64% of in-hospital deaths occurred in infants younger than 6 months, of which 79% occurred in low-income and lower-middle-income countries. Interpretation Infants younger than 1 year have disproportionately high risks of severe human metapneumovirus infections across all World Bank income regions and all child mortality settings, similar to respiratory syncytial virus and influenza virus. Infants younger than 6 months in low-income and lower-middle-income countries are at greater risk of death from human metapneumovirus-associated ALRI than older children and those in upper-middle-income and high-income countries. Our mortality estimates demonstrate the importance of intervention strategies for infants across all settings, and warrant continued efforts to improve the outcome of human metapneumovirus-associated ALRI among young infants in low-income and lower-middle-income countries. Funding Bill & Melinda Gates Foundation.
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- 2020
22. Results from the WHO external quality assessment for the respiratory syncytial virus pilot, 2016‐17
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Marilda M. Siqueira, Rakhee Palekar, Teresa C. T. Peret, Rodrigo Fasce, Almiro Tivane, Ian G Barr, Malinee Chittaganpitch, Marietjie Venter, Badarch Darmaa, Elsa Baumeister, Thedi Ziegler, Niteen Wairagkar, Belinda Louise Herring, Joanna Ellis, Varsha Potdar, Sandra Jackson, Siddhivinayak Hirve, Natalie J. Thornburg, Kadjo Herve, Shobha Broor, Amel Naguib, Ann Moen, Yan Li, Maria Pisareva, Mandeep S. Chadha, Florette K. Treurnicht, Wenqing Zhang, Maria Zambon, and Terry G. Besselaar
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Quality Assurance, Health Care ,Epidemiology ,polymerase chain reaction ,Pilot Projects ,Respiratory Syncytial Virus Infections ,medicine.disease_cause ,World Health Organization ,World health ,respiratory syncytial viruses ,External quality assessment ,medicine ,Molecular diagnostic techniques ,Humans ,RSV external quality assessment ,business.industry ,Public Health, Environmental and Occupational Health ,Original Articles ,Disease control ,Infectious Diseases ,Respiratory syncytial virus (RSV) ,Molecular Diagnostic Techniques ,Respiratory Syncytial Virus, Human ,Emergency medicine ,RNA, Viral ,Original Article ,business ,Laboratories ,Quality assurance ,Response system - Abstract
Background: External quality assessments (EQAs) for the molecular detection of respiratory syncytial virus (RSV) are necessary to ensure the provision of reliable and accurate results. One of the objectives of the pilot of the World Health Organization (WHO) Global RSV Surveillance, 2016-2017, was to evaluate and standardize RSV molecular tests used by participating countries. This paper describes the first WHO RSV EQA for the molecular detection of RSV. Methods: The WHO implemented the pilot of Global RSV Surveillance based on the WHO Global Influenza Surveillance and Response System (GISRS) from 2016 to 2018 in 14 countries. To ensure standardization of tests, 13 participating laboratories were required to complete a 12 panel RSV EQA prepared and distributed by the Centers for Disease Control and Prevention (CDC), USA. The 14th laboratory joined the pilot late and participated in a separate EQA. Laboratories evaluated a RSV rRT-PCR assay developed by CDC and compared where applicable, other Laboratory Developed Tests (LDTs) or commercial assays already in use at their laboratories. Results: Laboratories performed well using the CDC RSV rRT-PCR in comparison with LDTs and commercial assays. Using the CDC assay, 11 of 13 laboratories reported correct results. Two laboratories each reported one false-positive finding. Of the laboratories using LDTs or commercial assays, results as assessed by Ct values were 100% correct for 1/5 (20%). With corrective actions, all laboratories achieved satisfactory outputs. Conclusions: These findings indicate that reliable results can be expected from this pilot. Continued participation in EQAs for the molecular detection of RSV is recommended.
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- 2020
23. Metformin-induced suppression of IFN-α via mTORC1 signalling following seasonal vaccination is associated with impaired antibody responses in type 2 diabetes
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Arnone Nithichanon, Chidchamai Kewcharoenwong, Patcharavadee Butta, Malinee Chittaganpitch, Ganjana Lertmemongkolchai, Yoshimasa Takahashi, Kampaew Buayai, Tanapat Palaga, Wipawee Saenwongsa, Boonyarat Thumrongwilainet, and Manabu Ato
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0301 basic medicine ,Male ,Antibody Affinity ,lcsh:Medicine ,Type 2 diabetes ,Antibodies, Viral ,Monocytes ,Glibenclamide ,0302 clinical medicine ,Influenza A Virus, H1N1 Subtype ,Glyburide ,lcsh:Science ,Vaccines ,Multidisciplinary ,biology ,Vaccination ,Metformin ,Influenza Vaccines ,Medicine ,Female ,Seasons ,Antibody ,medicine.drug ,Signal Transduction ,Trivalent influenza vaccine ,Influenza vaccine ,Science ,Mechanistic Target of Rapamycin Complex 1 ,Article ,03 medical and health sciences ,Diabetes mellitus ,medicine ,Humans ,Aged ,Preventive medicine ,business.industry ,Influenza A Virus, H3N2 Subtype ,lcsh:R ,Virion ,Interferon-alpha ,Hemagglutination Inhibition Tests ,medicine.disease ,Influenza B virus ,030104 developmental biology ,Diabetes Mellitus, Type 2 ,Immunoglobulin G ,Immunology ,Antibody Formation ,biology.protein ,lcsh:Q ,business ,030215 immunology - Abstract
Diabetes mellitus (DM) patients are at an increased risk of complications following influenza-virus infection, seasonal vaccination (SV) is recommended. However, SV with trivalent influenza vaccine (TIV) can induce antibody and type-I interferon (IFN) responses, and the effect of anti-DM treatment on these responses is incompletely understood. We evaluated the antibody response and IFN-α expression in individuals with and without type 2 DM (T2DM) following SV, and examined the effects on anti-DM treatment. TIV elicited sero-protection in all groups, but antibody persistency was <8 months, except for the antibody response to B-antigens in non-DM. T2DM impaired the IgG avidity index, and T2DM showed a significantly decreased response against H1N1 and H3N2, in addition to delaying and reducing haemagglutination-inhibition persistency against influenza B-antigens in DM groups treated with metformin (Met-DM) or glibenclamide (GB-DM). Following TIV, the Met-DM and GB-DM groups exhibited reduced IFN-α expression upon stimulation with whole- and split-virion influenza vaccines. Suppression of IFN-α expression in the Met-DM group was associated with a reduction in the mechanistic target of rapamycin complex-1 pathway and impaired IgG avidity index. Thus, single-dose TIV each year might not be suitable for T2DM. Our data could aid the development of an efficacious influenza vaccine for T2DM.
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- 2020
24. Etiology and Clinical Characteristics of Severe Pneumonia Among Young Children in Thailand: Pneumonia Etiology Research for Child Health (PERCH) Case-Control Study Findings, 2012-2013
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Tussanee Amorninthapichet, Charatdao Bunthi, Maria Deloria-Knoll, Susan A. Maloney, Katherine L. O'Brien, Somchai Chuananon, Wantana Paveenkittiporn, Julia Rhodes, David R. Murdoch, Pasakorn Akarasewi, Somsak Thamthitiwat, Henry C. Baggett, Malinee Chittaganpitch, Pongpun Sawatwong, Melissa M. Higdon, Laura L. Hammitt, Daniel R. Feikin, and Christine Prosperi
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Microbiology (medical) ,Male ,Pediatrics ,medicine.medical_specialty ,Tuberculosis ,etiology ,PERCH ,Risk Factors ,PERCH Site-Specific Etiology Results ,Odds Ratio ,Medicine ,Humans ,Developing Countries ,Cause of death ,childhood ,Perch ,medicine.diagnostic_test ,biology ,AIDS-Related Opportunistic Infections ,business.industry ,Case-control study ,Child Health ,Patient Acuity ,Infant ,Bayes Theorem ,Odds ratio ,Pneumonia ,medicine.disease ,biology.organism_classification ,Thailand ,Hospitalization ,Infectious Diseases ,Logistic Models ,Case-Control Studies ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Etiology ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,Female ,business ,Chest radiograph - Abstract
Supplemental Digital Content is available in the text., Background: Pneumonia remains the leading cause of death among children
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- 2021
25. Functioning of the International Health Regulations during the COVID-19 pandemic
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Ximena Aguilera, Dexin Li, Myongsei Sohn, Thouraya A Attia, Lothar Wieler, Malinee Chittaganpitch, James W. Le Duc, Seif Al-Abri, Lucille Blumberg, Talat Mokhtari-Azad, Preben Aavitsland, Mark Salter, Carmen C Aramburu, Olubunmi E Ojo, Jean-Marie Okwo-Bele, Mohamed Moussif, Vincent Amani, Tomoya Saito, and Amadou A. Sall
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2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Comment ,MEDLINE ,COVID-19 ,International Health Regulations ,General Medicine ,Global Health ,World Health Organization ,Political science ,Environmental health ,Pandemic ,Humans ,Pandemics - Published
- 2021
26. Antibody responses induced by trivalent inactivated influenza vaccine among pregnant and non-pregnant women in Thailand: A matched cohort study
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Prabda Praphasiri, Sutthichai Nakphook, Joshua A. Mott, Jayanton Patumanond, Kriengkrai Prasert, Manash Shrestha, and Malinee Chittaganpitch
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Viral Diseases ,Physiology ,Maternal Health ,Antibody Response ,Antibodies, Viral ,Biochemistry ,Cohort Studies ,Medical Conditions ,Pregnancy ,Immune Physiology ,Medicine and Health Sciences ,Medicine ,Public and Occupational Health ,Prospective Studies ,Immune Response ,Vaccines ,Multidisciplinary ,Immune System Proteins ,Viral Vaccine ,Vaccination ,Gestational age ,Obstetrics and Gynecology ,Thailand ,Vaccination and Immunization ,Titer ,Infectious Diseases ,Influenza A virus ,Influenza Vaccines ,Cohort ,Female ,Research Article ,Trivalent influenza vaccine ,Adult ,medicine.medical_specialty ,Infectious Disease Control ,Influenza vaccine ,Science ,Immunology ,Microbiology ,Antibodies ,Internal medicine ,Virology ,Influenza, Human ,Humans ,Seroconversion ,Hemagglutination assay ,business.industry ,Biology and Life Sciences ,Proteins ,Viral Vaccines ,Influenza ,Vaccines, Inactivated ,Antibody Formation ,Women's Health ,Preventive Medicine ,Pregnant Women ,business - Abstract
Background We compared influenza antibody titers among vaccinated and unvaccinated pregnant and non-pregnant women. Methods During 1st June– 30th September 2018, four groups of cohort participants—vaccinated pregnant, unvaccinated pregnant, vaccinated non-pregnant, and unvaccinated non-pregnant women were selected by matching age, gestational age, and the week of vaccination. Serum antibody titers against each strain of 2018 Southern Hemisphere inactivated trivalent influenza vaccine (IIV3) were assessed by hemagglutination inhibition (HI) assay on Day 0 (pre-vaccination) and Day 28 (one month post-vaccination) serum samples. Geometric mean titer (GMT), GMT ratio (GMR), seroconversion (defined as ≥4 fold increase in HI titer), and seroprotection (i.e. HI titer ≥1:40) were compared across the study groups using multilevel regression analyses, controlling for previous year vaccination from medical records and baseline antibody levels. Results A total of 132 participants were enrolled in the study (33 in each of the four study groups). The baseline GMTs for influenza A(H1N1), A(H3N2), and B vaccine strains were not significantly different among all four groups (all p-values >0.05). After one month, both vaccinated groups had significantly higher GMT, GMR, seroconversion, and seroprotection than their unvaccinated controls (all p-values 0.05). Conclusions The 2018 seasonal IIV3 was immunogenic against all three vaccine strains and pregnancy did not seem to alter the immune response to IIV3. These findings support the current influenza vaccination recommendations for pregnant women.
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- 2021
27. Early transmission patterns of coronavirus disease 2019 (COVID-19) in travellers from Wuhan to Thailand, January 2020
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Nanthawan Mekha, Noppavan Janejai, Sumonmal Uttayamakul, Sittiporn Parnmen, Siripaporn Phuygun, Warawan Wongboot, Sunthareeya Waicharoen, Raphael T.C. Lee, Pilailuk Akkapaiboon Okada, Apichart Vachiraphan, Thanutsapa Thanadachakul, Supaporn Wacharapluesadee, Malinee Chittaganpitch, Sopon Iamsirithaworn, Sebastian Maurer-Stroh, and Rome Buathong
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0301 basic medicine ,Wuhan ,traveller ,China ,Coronavirus disease 2019 (COVID-19) ,Epidemiology ,Pneumonia, Viral ,coronavirus ,Genome, Viral ,Biology ,DNA sequencing ,Disease Outbreaks ,03 medical and health sciences ,Betacoronavirus ,0302 clinical medicine ,Virology ,Humans ,030212 general & internal medicine ,Medical History Taking ,Phylogeny ,Aged ,Travel ,COVID-19 ,transmission ,SARS-CoV-2 ,Coronavirus ,Transmission (medicine) ,Reverse Transcriptase Polymerase Chain Reaction ,Public Health, Environmental and Occupational Health ,Chromosome Mapping ,Middle Aged ,Thailand ,030104 developmental biology ,Viral genomes ,Female ,Coronavirus Infections ,Rapid Communication - Abstract
We report two cases of coronavirus disease 2019 (COVID-19) in travellers from Wuhan, China to Thailand. Both were independent introductions on separate flights, discovered with thermoscanners and confirmed with RT-PCR and genome sequencing. Both cases do not seem directly linked to the Huanan Seafood Market in Hubei but the viral genomes are identical to four other sequences from Wuhan, suggesting early spread within the city already in the first week of January.
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- 2020
28. Human respiratory syncytial virus and influenza seasonality patterns-Early findings from the WHO global respiratory syncytial virus surveillance
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Mandeep, Chadha, Siddhivinayak, Hirve, Christina, Bancej, Ian, Barr, Elsa, Baumeister, Braulia, Caetano, Malinee, Chittaganpitch, Badarch, Darmaa, Joanna, Ellis, Rodrigo, Fasce, Herve, Kadjo, Sandra, Jackson, Vivian, Leung, Maria, Pisareva, Jocelyn, Moyes, Amel, Naguib, Almiro, Tivane, Wenqing, Zhang, and Maria, Zambon
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Epidemiology ,Hospitalized patients ,viruses ,Pilot Projects ,Respiratory Syncytial Virus Infections ,Global Health ,World Health Organization ,Virus ,World health ,Age groups ,Environmental health ,Influenza, Human ,medicine ,Humans ,Respiratory system ,Respiratory Tract Infections ,Respiratory illness ,business.industry ,seasonality ,Public Health, Environmental and Occupational Health ,virus diseases ,Original Articles ,Seasonality ,medicine.disease ,Orthomyxoviridae ,Global Influenza Surveillance and Response network ,Infectious Diseases ,Respiratory Syncytial Virus, Human ,Original Article ,Seasons ,business ,human respiratory syncytial virus ,influenza ,Sentinel Surveillance - Abstract
Background Human respiratory syncytial virus (RSV) causes illnesses among all age groups and presents a burden to healthcare services. To better understand the epidemiology and seasonality of RSV in different geographical areas, the World Health Organization (WHO) coordinated a pilot initiative to access the feasibility of establishing RSV surveillance using the existing Global Influenza Surveillance and Response System (GISRS) platform. Objectives To describe and compare RSV and influenza seasonality in countries in the northern andsouthern temperate, and tropics during the period January 2017 to April 2019. Methods Fourteen countries in six WHO regions participating in the GISRS were invited for the pilot. Hospitalized patients presenting with severe acute respiratory illness (SARI), SARI without fever and outpatients presenting with acute respiratory illness (ARI) were enrolled from January 2017 to April 2019. The expected minimum sample size was 20 samples per week, year-round, per country. Real-time RT-PCR was used to detect RSV and influenza viruses. Results were uploaded to the WHO FluMart platform. Results Annual seasonality of RSV was observed in all countries, which overlapped to a large extent with the influenza activity. In countries, in temperate regions RSV peaked in the autumn/winter months. In Egypt, a subtropical country, RSV activity peaked in the cooler season. In the tropical regions, RSV peaked during the rainy seasons. Conclusion Early findings from the WHO RSV surveillance pilot based on the GISRS suggest annual seasonal patterns for of RSV circulation that overlap with influenza. RSV surveillance needs to be continued for several more seasons to establish seasonality patterns to inform prevention and control strategies.
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- 2019
29. Viral etiologies of influenza‐like illness and severe acute respiratory infections in Thailand
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Malinee Chittaganpitch, Somchai Sangkitporn, Prabda Praphasiri, Sonja J. Olsen, Thitipong Yingyong, Sunthareeya Waicharoen, and Kim A. Lindblade
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0301 basic medicine ,Pulmonary and Respiratory Medicine ,Adult ,Male ,medicine.medical_specialty ,Adolescent ,Epidemiology ,viruses ,Virus ,law.invention ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,law ,Internal medicine ,Throat ,respiratory viruses ,medicine ,Humans ,Metapneumovirus ,030212 general & internal medicine ,Respiratory system ,Child ,Respiratory Tract Infections ,Polymerase chain reaction ,severe acute respiratory infections ,Aged ,Influenza-like illness ,influenza‐like illness ,realtime PCR ,business.industry ,Public Health, Environmental and Occupational Health ,virus diseases ,Infant ,Original Articles ,Middle Aged ,Thailand ,030112 virology ,Infectious Diseases ,medicine.anatomical_structure ,Virus Diseases ,Child, Preschool ,Etiology ,Original Article ,Female ,Seasons ,business - Abstract
BACKGROUND Information on the burden, characteristics and seasonality of non-influenza respiratory viruses is limited in tropical countries. OBJECTIVES Describe the epidemiology of selected non-influenza respiratory viruses in Thailand between June 2010 and May 2014 using a sentinel surveillance platform established for influenza. METHODS Patients with influenza-like illness (ILI; history of fever or documented temperature ≥38°C, cough, not requiring hospitalization) or severe acute respiratory infection (SARI; history of fever or documented temperature ≥38°C, cough, onset
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- 2018
30. Knowledge, attitude/perception, and practice related to seasonal influenza vaccination among caregivers of young Thai children: A cross-sectional study
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Suwadee Jirasakpisarn, Chareeya Thanee, Koonkoaw Roekworachai, Joshua A. Mott, Tawee Chotpitayasunondh, Chalinthorn Sinthuwattanawibool, Arunee Klinklom, Piyarat Suntarattiwong, Malinee Chittaganpitch, Fatimah S. Dawood, Wanitchaya Kittikraisak, Ussanee Srirompotong, and Katesiree Kornsitthikul
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Male ,Parents ,RNA viruses ,Health Knowledge, Attitudes, Practice ,Viral Diseases ,Influenza Viruses ,Cross-sectional study ,Pathology and Laboratory Medicine ,Logistic regression ,Pediatrics ,Families ,Medical Conditions ,Surveys and Questionnaires ,Medicine and Health Sciences ,Medicine ,Public and Occupational Health ,Children ,Vaccines ,Multidisciplinary ,Medical record ,Vaccination ,Child Health ,Thailand ,Vaccination and Immunization ,Infectious Diseases ,Caregivers ,Influenza Vaccines ,Medical Microbiology ,Child, Preschool ,Viral Pathogens ,Viruses ,Female ,Pathogens ,Research Article ,Adult ,Infectious Disease Control ,Influenza vaccine ,Science ,Immunology ,MEDLINE ,Microbiology ,Virology ,Influenza, Human ,Humans ,Microbial Pathogens ,business.industry ,Organisms ,Infant ,Biology and Life Sciences ,Viral Vaccines ,Odds ratio ,Influenza ,Confidence interval ,Health Care ,Age Groups ,People and Places ,Perception ,Population Groupings ,Preventive Medicine ,business ,Orthomyxoviruses ,Demography - Abstract
Background Seasonal influenza vaccination uptake among young children in Thailand is low despite national recommendation for vaccination. We implemented a knowledge, attitude/perception, and practice survey to understand determinants of influenza vaccination in children aged six months to two years. Methods Using a cross-sectional design, we interviewed caregivers of 700 children in seven hospitals using a structured questionnaire to collect information on caregivers’ and children’s demographic characteristics, and caregivers’ knowledge of influenza illness and national vaccine recommendation, attitude/perception toward influenza vaccine, and information sources. We verified children’s influenza vaccination status against medical records (vaccinated vs. unvaccinated). Logistic regression was used to examine factors independently associated with children receiving influenza vaccination in the 2018 season using the dataset restricted to only children’s parents. Variables associated with vaccination at p-value ≤0.20 were included in subsequent multivariable logistic models. Significant independent determinants of children’s influenza vaccination and collinearity of covariates were assessed. The final model was constructed using a stepwise backward elimination approach with variables significant at p-value Results During August 2018-February 2019, 700 children’s caregivers completed the questionnaire; 61 (9%) were caregivers of vaccinated children. Caregivers of the vaccinated children were statistically more likely to have higher education (61% vs. 38%; p-value Conclusion The majority of caregivers of children in this study had knowledge of influenza illness and influenza vaccine. Caregivers reported various sources of information regarding influenza illness and the vaccine, but healthcare providers remained the most trusted source. Children’s history of influenza vaccination in prior season(s) was the strongest determinant of children being vaccinated for influenza in the current season.
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- 2021
31. The acceptability and validity of self‐collected nasal swabs for detection of influenza virus infection among older adults in Thailand
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Kim A. Lindblade, Darunee Ditsungnoen, Malinee Chittaganpitch, Siriluk Jaichuang, Sunthareeya Waicharoen, Kriengkrai Prasert, Prabda Praphasiri, and Sonal Goyal
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0301 basic medicine ,Pulmonary and Respiratory Medicine ,Male ,medicine.medical_specialty ,Epidemiology ,030106 microbiology ,Observation period ,Self collection ,Nose ,elderly ,Sensitivity and Specificity ,Virus ,Specimen Handling ,self‐collection ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Nasopharynx ,Influenza, Human ,medicine ,Humans ,030212 general & internal medicine ,Symptom onset ,Intensive care medicine ,Respiratory Tract Infections ,Aged ,Aged, 80 and over ,nasal swab ,business.industry ,Public Health, Environmental and Occupational Health ,Healthcare worker ,Original Articles ,sensitivity ,Thailand ,Virus detection ,Infectious Diseases ,Nasal Swab ,Influenza A virus ,Original Article ,Female ,Sample collection ,business ,influenza - Abstract
Background Self-collection of nasal swabs could improve the timeliness of influenza virus detection in older adults. Objectives Measure the acceptability, adequacy, timeliness and validity of self-collected nasal swabs among adults ≥65 years in Thailand. Methods Our evaluation consisted of two parts: a one-month study among randomly-selected, community-dwelling older adults to simulate community-based surveillance for acute respiratory infections (ARI); and a clinic study of older adults with ARI to evaluate the sensitivity and specificity of self-collected nasal swabs for influenza virus infection compared with healthcare worker (HCW)-collected nasal and nasopharyngeal swabs. Results In the community study, 24% of participants experienced an ARI during the observation period. All (100%) participants with an ARI self-collected nasal swabs within 72 hours of symptom onset of which 92% were considered adequate samples. In the clinic study, 45% of patients with ARI presented within 72 hours of symptom onset. The sensitivity of self-collected nasal swabs for detection of influenza virus infection was 78% (95% CI 40-97) compared to nasopharyngeal and 88% (95% CI 47-100) compared to nasal swabs collected by HCW. Specificity was 100% (95% CI 97-100) compared to both methods. Self-collection of nasal swabs was found acceptable by 99% of participants in both studies. Conclusions Self-collection of nasal swabs was acceptable to older adults in Thailand who were able to take adequate samples. Self-collection of nasal swabs may improve the timeliness of sample collection but lower sensitivity will need to be considered. This article is protected by copyright. All rights reserved.
- Published
- 2017
32. The validity of clinical practice guidelines for empirical use of oseltamivir for influenza in Thai children
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Somtavil Ampornareekul, Malinee Chittaganpitch, Somkid Srisophaa, Sirirat Likanonsakul, and Jurai Wongsawat
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Male ,0301 basic medicine ,medicine.medical_specialty ,Oseltamivir ,Adolescent ,Appropriate use ,Antiviral Agents ,Decision Support Techniques ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Risk groups ,Human metapneumovirus ,Internal medicine ,Influenza, Human ,medicine ,Humans ,Prospective Studies ,030212 general & internal medicine ,Child ,Intensive care medicine ,Prospective cohort study ,biology ,business.industry ,Infant, Newborn ,Infant ,virus diseases ,Thailand ,biology.organism_classification ,medicine.disease ,030112 virology ,Predictive value ,Clinical Practice ,Pneumonia ,chemistry ,Child, Preschool ,Practice Guidelines as Topic ,Pediatrics, Perinatology and Child Health ,Female ,business - Abstract
Clinical practice guidelines for influenza have been implemented to maximise the appropriate use of empirical oseltamivir; however, good predictive values are required.Between October 2011 and September 2013, children aged 15 years who presented at the Bamrasnaradura Infectious Diseases Institute with an influenza-like illness plus either (i) pneumonia or (ii) being in a higher risk group for influenza complications were prospectively enrolled. Respiratory specimens were taken for real-time polymerase chain reaction testing (RT-PCR). Clinical characteristics, laboratory data and oseltamivir therapy were recorded.85 cases were enrolled. Of these, the proportions of those with pneumonia, who were aged 2 years and who had underlying diseases were 74.1%, 56.5% and 38.8%, respectively. RT-PCR detected respiratory syncytial virusamong (35.3%), influenza (22.3by%), adenovirus (14.1%), human metapneumovirus (5.9%), para-influenza (3.5%) and no viruses (25.9 %). Pneumonia (OR 0.16, 95% CI 0.05-0.50) and having two clinical criteria (OR 0.24, 95% CI 0.08-0.76) were significantly negative predictors of influenza. Having cluster transmissions (OR 5.18, 95% CI 1.38-19.37) and a monocyte proportion7% (OR 3.58, 95% CI 1.15-11.17) were significantly positive predictors of influenza. The mean (SD) percentage of influenza-like illness during the study period was 7.04 (2.02).Clinical criteria guidelines yielded a low predictive value (22.3%) for influenza in children. Seasonality, cluster transmission, white blood cell and differential counts may be helpful in diagnosing influenza. Nonetheless, empirical oseltamivir should not be delayed for those in need.
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- 2016
33. Enhanced surveillance for severe pneumonia, Thailand 2010–2015
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Christopher J. Gregory, Thitipong Yingyong, Wantana Paveenkittiporn, Henry C. Baggett, Ruchira Ruangchira-urai, Kumnuan Ungchusak, Somsak Thamthitiwat, Charatdao Bunthi, Anusak Kerdsin, Pasakorn Akarasewi, and Malinee Chittaganpitch
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Adult ,Male ,medicine.medical_specialty ,Community-acquired pneumonia ,Adolescent ,Middle East respiratory syndrome coronavirus ,030209 endocrinology & metabolism ,Disease ,medicine.disease_cause ,Disease Outbreaks ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Epidemiology ,medicine ,Humans ,030212 general & internal medicine ,Child ,Disease surveillance ,Surveillance ,business.industry ,lcsh:Public aspects of medicine ,Research ,Global health security ,Public Health, Environmental and Occupational Health ,Infant ,Outbreak ,lcsh:RA1-1270 ,Pneumonia ,Middle Aged ,Thailand ,medicine.disease ,CAP ,Hospitals ,Community-Acquired Infections ,Hospitalization ,Child, Preschool ,Population Surveillance ,Respiratory Syncytial Virus, Human ,Severe pneumonia ,Middle East Respiratory Syndrome Coronavirus ,Etiology ,Female ,business - Abstract
Background The etiology of severe pneumonia is frequently not identified by routine disease surveillance in Thailand. Since 2010, the Thailand Ministry of Public Health (MOPH) and US CDC have conducted surveillance to detect known and new etiologies of severe pneumonia. Methods Surveillance for severe community-acquired pneumonia was initiated in December 2010 among 30 hospitals in 17 provinces covering all regions of Thailand. Interlinked clinical, laboratory, pathological and epidemiological components of the network were created with specialized guidelines for each to aid case investigation and notification. Severe pneumonia was defined as chest-radiograph confirmed pneumonia of unknown etiology in a patient hospitalized ≤48 h and requiring intubation with ventilator support or who died within 48 h after hospitalization; patients with underlying chronic pulmonary or neurological disease were excluded. Respiratory and pathological specimens were tested by reverse transcription polymerase chain reaction for nine viruses, including Middle East Respiratory Syndrome Coronavirus (MERS-CoV), and 14 bacteria. Cases were reported via a secure web-based system. Results Of specimens from 972 cases available for testing during December 2010 through December 2015, 589 (60.6%) had a potential etiology identified; 399 (67.8%) were from children aged
- Published
- 2019
34. Influenza-associated mortality in Thailand, 2006–2011
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McCarron Margaret, Kanitta Bundhamcharoen, Khanitta Kusreesakul, Po-Yung Cheng, Sonja J. Olsen, Suchunya Aungkulanon, and Malinee Chittaganpitch
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Pulmonary and Respiratory Medicine ,Excess mortality ,education.field_of_study ,Epidemiology ,business.industry ,Population ,Public Health, Environmental and Occupational Health ,Developing country ,virus diseases ,tropical ,Original Articles ,medicine.disease ,Thailand ,mortality ,Influenza ,Vaccination ,Seasonal influenza ,Pneumonia ,Infectious Diseases ,Age groups ,Mortality data ,Medicine ,business ,education ,Demography - Abstract
Background Influenza-associated mortality in subtropical or tropical regions, particularly in developing countries, remains poorly quantified and often underestimated. We analyzed data in Thailand, a middle-income tropical country with good vital statistics and influenza surveillance data. Methods We obtained weekly mortality data for all-cause and three underlying causes of death (circulatory and respiratory diseases, and pneumonia and influenza), and weekly influenza virus data, from 2006 to 2011. A negative binomial regression model was used to estimate deaths attributable to influenza in two age groups ( 65 years. The average annual rate of influenza-associated deaths was 0·7 (95% CI: −8·2 to 10) per 100 000 population for person aged
- Published
- 2015
35. Immune response to influenza vaccination in ESRD patients undergoing hemodialysis vs. hemodiafiltration
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Artit Wongsa, Malinee Chittaganpitch, Nutaporn Sanmeema, Sutheera Thongpraphai, Chompunuch Boonarkart, Andrew Davenport, Arkom Nongnuch, Sirawat Srichatrapimuk, Boonrat Tassaneetrithep, Prasert Auewarakul, Angsana Phuphuakrat, and Wattanachai Ngampongpan
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Male ,0301 basic medicine ,Viral Diseases ,T-Lymphocytes ,medicine.medical_treatment ,030232 urology & nephrology ,Lymphocyte proliferation ,White Blood Cells ,0302 clinical medicine ,Animal Cells ,Chronic Kidney Disease ,Azotemia ,Medicine and Health Sciences ,Public and Occupational Health ,Lymphocytes ,Immune Response ,Vaccines ,education.field_of_study ,Multidisciplinary ,T Cells ,Vaccination ,Middle Aged ,Vaccination and Immunization ,Infectious Diseases ,Nephrology ,Influenza Vaccines ,Medicine ,Female ,Hemodialysis ,Cellular Types ,Research Article ,Adult ,Trivalent influenza vaccine ,medicine.medical_specialty ,Infectious Disease Control ,Influenza vaccine ,Science ,Immune Cells ,Immunology ,Population ,Hemodiafiltration ,03 medical and health sciences ,Renal Dialysis ,Internal medicine ,Medical Dialysis ,Lymphocyte Proliferation ,Influenza, Human ,medicine ,Humans ,Seroconversion ,education ,Dialysis ,Aged ,Cell Proliferation ,Blood Cells ,business.industry ,Biology and Life Sciences ,Cell Biology ,Hemagglutination Inhibition Tests ,Influenza ,Immunity, Innate ,030104 developmental biology ,Kidney Failure, Chronic ,Preventive Medicine ,business - Abstract
Background On-line hemodiafiltration (HDF) clears more azotemic toxins compared to high-flux hemodialysis (HD). The response to vaccination is impaired in dialysis patients. We wished to determine whether the immune responses to influenza vaccine in dialysis patients treated by HDF were stronger than those treated by HD. Materials and methods We conducted a prospective cohort study in chronic dialysis patients during the 2016 and 2017 influenza seasons. All participants received a single standard dose of trivalent influenza vaccine, and we studied the elicited humoral immune response by hemagglutination inhibition test, and cell-mediated immune response by enumeration of lymphocyte cellular markers and proliferation assays. Results We immunized 60 end-stage renal disease (ESRD) patients: 42 (70%) treated with HD and 18 patients (30%) with HDF. The median (interquartile range) age was 65.0 (55.0–74.5) years. All patients developed seroprotection to at least one influenza vaccine strain at one month post-vaccination, and did not differ between groups. By logistic regression, age was the only factor independently associated with seroconversion to all vaccine strains (odds ratio 0.89, 95% confidence interval 0.80–0.98; p = 0.022). Seroprotection to all vaccine strains was sustained for longer in patients treated with HDF, and the results remained the same after age adjustment. For cellular immune response, patients who seroconverted to all vaccine strains had higher CD38+ T cell subpopulations pre-vaccination. Patients treated by HDF had higher lymphocyte proliferation to circulating influenza A strains. Conclusions Seroconversion to all influenza vaccine strains was associated with age. Patients treated with HDF demonstrated seroprotection was sustained for longer compared to those treated by HD and greater lymphocyte proliferation to circulating influenza A strains. These encouraging results for HDF require confirmation in a larger dialysis population. Trial registration ClinicalTrial.gov, NCT04122222.
- Published
- 2020
36. Influenza seasonality and vaccination timing in tropical and subtropical areas of southern and south-eastern Asia
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Krisna Nur Andriana Pangesti, Marc-Alain Widdowson, Sibounhom Archkhawongs, Vito G. Roque, Nora Chea, Gina Samaan, Mahmudur Rahman, Andrew Corwin, Mandeep S. Chadha, Sok Touch, Ann Moen, Constance Low, Vivi Setiawaty, Ondri Dwi Sampurno, Darouny Phonekeo, Philippe Buchy, Chong Chee Kheong, Malinee Chittaganpitch, Paul Kitsutani, Abdullah Al Mamun, Katharine Sturm-Ramirez, Sirima Pattamadilok, Renu B. Lal, Sonja J. Olsen, Le Quynh Mai, Mohd Apandi Yusof, Phengta Vongphrachanh, Raymond T. P. Lin, Norizah Ismail, Akhilesh C. Mishra, Siddhartha Saha, Vu Dinh Thiem, Jeffrey Partridge, and Amado Tandoc
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Tropical Climate ,Equator ,Viet nam ,Editorials ,Public Health, Environmental and Occupational Health ,virus diseases ,Subtropics ,Seasonality ,Orthomyxoviridae ,medicine.disease ,Vaccination ,Nasal Mucosa ,Geography ,Influenza Vaccines ,Environmental protection ,Influenza, Human ,Tropical climate ,Temperate climate ,medicine ,Humans ,Seasons ,Socioeconomics ,Asia, Southeastern ,South eastern - Abstract
To characterize influenza seasonality and identify the best time of the year for vaccination against influenza in tropical and subtropical countries of southern and south-eastern Asia that lie north of the equator.Weekly influenza surveillance data for 2006 to 2011 were obtained from Bangladesh, Cambodia, India, Indonesia, the Lao People's Democratic Republic, Malaysia, the Philippines, Singapore, Thailand and Viet Nam. Weekly rates of influenza activity were based on the percentage of all nasopharyngeal samples collected during the year that tested positive for influenza virus or viral nucleic acid on any given week. Monthly positivity rates were then calculated to define annual peaks of influenza activity in each country and across countries.Influenza activity peaked between June/July and October in seven countries, three of which showed a second peak in December to February. Countries closer to the equator had year-round circulation without discrete peaks. Viral types and subtypes varied from year to year but not across countries in a given year. The cumulative proportion of specimens that tested positive from June to November was60% in Bangladesh, Cambodia, India, the Lao People's Democratic Republic, the Philippines, Thailand and Viet Nam. Thus, these tropical and subtropical countries exhibited earlier influenza activity peaks than temperate climate countries north of the equator.Most southern and south-eastern Asian countries lying north of the equator should consider vaccinating against influenza from April to June; countries near the equator without a distinct peak in influenza activity can base vaccination timing on local factors.Caractériser la saisonnalité de la grippe et identifier le meilleur moment de l'année pour la vaccination contre la grippe dans les pays tropicaux et subtropicaux de l'Asie du Sud et de l'Asie du Sud-Est, qui sont situés au nord de l'équateur.Les données hebdomadaires de la surveillance de la grippe pour la période allant de 2006 à 2001 ont été obtenues auprès du Bangladesh, du Cambodge, de l'Inde, de la République démocratique populaire lao, de la Malaisie, des Philippines, de Singapour, de la Thaïlande et du Viet Nam. Les taux hebdomadaires de l'activité grippale étaient basés sur le pourcentage de tous les échantillons nasopharyngés collectés au cours de l'année et dont les tests étaient positifs au virus de la grippe ou à l'acide nucléique viral au cours d'une semaine donnée. Les pourcentages de cas positifs mensuels ont été ensuite calculés pour définir les pics annuels de l'activité grippale au sein de chaque pays et entre les pays.L'activité grippale atteint son pic entre les mois de juin/juillet et octobre dans sept pays, parmi lesquels trois pays ont présenté un second pic entre les mois de décembre et février. Les pays proches de l'équateur présentent une circulation continue sans pic distinct. Les types et sous-types viraux varient d'une année à l'autre, mais pas entre les pays au cours d'une année donnée. Le pourcentage cumulatif des prélèvements dont les tests étaient positifs de juin à novembre, était supérieur à 60% au Bangladesh, au Cambodge, en Inde, en République démocratique populaire lao, aux Philippines, en Thaïlande et au Viet Nam. Par conséquent, ces pays tropicaux et subtropicaux ont enregistré plus tôt des pics d'activité grippale que dans les pays à climat tempéré situés au nord de l'équateur.La plupart des pays de l'Asie du Sud et de l'Asie du Sud-Est, situés au nord de l'équateur, devraient envisager la vaccination contre la grippe pendant la période allant d'avril à juin. Les pays proches de l'équateur sans pic distinct d'activité grippale peuvent baser leur calendrier de vaccination sur leurs facteurs locaux.Describir la estacionalidad de la gripe e identificar el mejor momento del año para llevar a cabo la vacunación contra la gripe en países tropicales y subtropicales del sur y sureste de Asia situados al norte del ecuador.Se obtuvieron los datos semanales de vigilancia de la gripe de los años 2006 a 2011 de Bangladesh, Camboya, India, Indonesia, la República Democrática Popular Lao, Malasia, Filipinas, Singapur, Tailandia y Viet Nam. Las tasas semanales de la actividad de la gripe se basaron en el porcentaje de todas las muestras nasofaríngeas recogidas durante el año que dieron positivo en la prueba del virus de la gripe o del ácido nucleido viral en cualquier semana. Los índices de resultados positivos mensuales se calcularon luego a fin de determinar los picos anuales de la actividad de la gripe en cada uno de los países y entre países.La actividad de la gripe experimentó un aumento entre junio y julio, y octubre en siete países, tres de los cuales mostraron un segundo pico de actividad de diciembre a febrero. Los países más cercanos al ecuador presentaron una circulación durante todo el año sin picos discontinuos. Los tipos y subtipos virales variaron de año en año, pero no entre los países en un año determinado. La proporción acumulada de individuos que dieron positivo de junio a noviembre fue 60 % en Bangladesh, Camboya, India, la República Democrática Popular Lao, Filipinas, Tailandia y Viet Nam. Así, en estos países tropicales y subtropicales, los picos de actividad de la gripe se produjeron antes que en los países de clima templado al norte de la línea ecuatorial.La mayoría de los países del sur y sureste asiático situados al norte del ecuador deberían considerar llevar a cabo la vacunación contra la gripe de abril a junio; mientras que los países cercanos al ecuador sin picos marcados en la actividad de la gripe pueden basar la fecha de vacunación en factores locales.تحديد خصائص موسمية الأنفلونزا والتعرف على أفضل أوقات السنة للتطعيم ضد الأنفلونزا في البلدان المدارية ودون المدارية في جنوب وجنوب شرق آسيا الواقعة شمال خط الاستواء.تم الحصول على بيانات الترصد الأسبوعية للأنفلونزا للفترة من 2006 إلى 2011 من بنغلاديش وكمبوديا والهند وإندونيسيا وجمهورية لاو الديمقراطية الشعبية وماليزيا والفلبين وسنغافورة وتايلند وفييت نام. واستندت المعدلات الأسبوعية لنشاط الأنفلونزا على النسبة المئوية لجميع عينات البلعوم الأنفي التي تم جمعها أثناء العام والتي كانت نتائج اختباراتها إيجابية لفيروس الأنفلونزا أو الحمض النووي الفيروسي في أسبوع معين. وتم حساب معدلات الإيجابية الشهرية لتحديد فترات ذروة نشاط الأنفلونزا السنوية في كل بلد وعبر البلدان.بلغ نشاط الأنفلونزا ذروته في الفترة بين حزيران/يونيو / تموز/يوليو وتشرين الأول/أكتوبر في سبعة بلدان، حيث أظهرت ثلاثة منها ذروة ثانية في الفترة من كانون الأول/ديسمبر إلى شباط/فبراير. وشهدت البلدان الأقرب إلى خط الاستواء دوراناً طوال العام دون فترات ذروة منفصلة. واختلفت الأنماط والأنماط الفرعية للفيروس من سنة إلى أخرى، ولكن لم تختلف عبر البلدان في سنة معينة. وكانت النسبة التراكمية للعينات التي كانت نتائج اختباراتها إيجابية من حزيران/يونيو إلى تشرين الثاني/نوفمبر أكبر من 60 % في بنغلاديش وكمبوديا والهند وجمهورية لاو الديمقراطية الشعبية والفلبين وتايلند وفييت نام. ومن ثم، أظهرت هذه البلدان المدارية ودون المدارية فترات ذروة مبكرة لنشاط الأنفلونزا عن البلدان معتدلة المناخ الواقعة شمال خط الاستواء.ينبغي أن تنظر معظم بلدان جنوب وجنوب شرق آسيا الواقعة شمال خط الاستواء في التطعيم ضد الأنفلونزا في الفترة من نيسان/إبريل إلى حزيران/يونيو؛ في حين تستطيع البلدان القريبة من خط الاستواء التي لا تشهد ذروة منفصلة في نشاط الأنفلونزا تحديد توقيت التطعيم على أساس العوامل المحلية.表征赤道以北的南亚和东南亚热带和亚热带国家流感季节性特点并确定流感疫苗接种最佳时间。从孟加拉国、柬埔寨、印度、印度尼西亚、老挝、马来西亚、菲律宾、新加坡、泰国和越南收集2006年至2011年的每周流感监测数据。每周流感活动率基于的是任何给定周测试流感病毒或病毒核酸阳性的一年中收集的鼻咽样本的百分比。然后,计算每月阳性率来定义每个国家和各国之间年流感活动的峰值。七个国家中,6月/7月和10月之间出现流感活动峰值,其中三个国家在12月至2月出现第二次峰值。靠近赤道的国家长年流感传播,没有不连续的峰值。病毒类型和子类型因年份而异,但在给定年份的各个国家之间没有变化。孟加拉国、柬埔寨、印度、老挝人民民主共和国、菲律宾、泰国和越南6月至11月测试阳性的样本的累积比例 60%。因此,较之赤道以北温带气候国家,这些热带和亚热带国家出现流感活动峰值更早。赤道以北的大多数亚洲南部和东南部国家应考虑从4月到6月接种流感疫苗,赤道附近没有出现明显的流感活动峰值的国家可以根据当地因素确定疫苗接种时间。Охарактеризовать сезонность гриппа и определить лучшее время года для проведения вакцинации против гриппа в тропических и субтропических странах Южной и Юго-Восточной Азии, расположенных к северу от экватора.Еженедельные данные эпиднадзора по гриппу с 2006 по 2011 гг. были получены из Бангладеш, Камбоджи, Индии, Индонезии, Лаосской Народно-Демократической Республики, Малайзии, Филиппин, Сингапура, Таиланда и Вьетнама. Недельные показатели активности гриппа вычислялись на основе процента от общего количества всех мазков из носоглотки, собранных в течение года, показавших положительный результат на вирус гриппа или вирусную нуклеиновую кислоту в течение любой данной недели. Затем были рассчитаны месячные показатели позитивности с целью определить ежегодные пики активности гриппа в каждой из стран и во всех странах региона.Активность гриппа достигала своего пика между июнем/июлем и октябрем в семи странах, в трех из которых отмечен второй пик с декабря по февраль. Страны ближе к экватору имели круглогодичную циркуляцию заболевания без отдельных пиков. Вирусные типы и подтипы менялись из года в год, но не во всех странах в отдельно взятом году. Совокупная доля положительных образцов с июня по ноябрь составила60% в Бангладеш, Камбодже, Индии, Лаосской Народно-Демократической Республики, Филиппинах, Таиланде и Вьетнаме. Таким образом, эти тропические и субтропические страны показали более ранние пики активности гриппа по сравнению со странами с умеренным климатом к северу от экватора.Большинству стран Южной и Юго-Восточной Азии, расположенных к северу от экватора, следует рассмотреть проведение вакцинации против гриппа в сроки с апреля по июнь; страны вблизи экватора без четко выраженного пика активности гриппа могут определять сроки вакцинации исходя из местных факторов.
- Published
- 2014
37. Effectiveness of the 2010 and 2011 Southern Hemisphere trivalent inactivated influenza vaccines against hospitalization with influenza-associated acute respiratory infection among Thai adults aged ≥50 years
- Author
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Sonja J. Olsen, Fatimah S. Dawood, Malinee Chittaganpitch, Prabda Prapasiri, Peera Areerat, Henry C. Baggett, Charung Muangchana, and Asadang Ruayajin
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Male ,Rural Population ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Epidemiology ,Influenza vaccine ,Orthomyxoviridae ,Real-Time Polymerase Chain Reaction ,Thais ,Logistic regression ,elderly ,Vaccination status ,Internal medicine ,Influenza, Human ,medicine ,Animals ,Humans ,Aged ,Aged, 80 and over ,biology ,Reverse Transcriptase Polymerase Chain Reaction ,business.industry ,Public Health, Environmental and Occupational Health ,Case-control study ,Respiratory infection ,Original Articles ,Middle Aged ,Thailand ,biology.organism_classification ,Case–control studies ,Hospitalization ,Vaccination ,Treatment Outcome ,Infectious Diseases ,Influenza Vaccines ,Case-Control Studies ,Immunology ,flu vaccines ,Female ,influenza vaccine ,business - Abstract
Background Inactivated influenza vaccine (IIV) effectiveness has been evaluated among older adults in high-income countries, but data on IIV effectiveness in low- and middle-income countries remain sparse. We conducted a test-negative case–control analysis to estimate 2010 and 2011 trivalent IIV effectiveness against hospitalization with influenza-associated acute respiratory infection (ARI) among persons aged ≥50 years in rural Thailand. Methods During 2010–2011, active surveillance for ARI hospitalization was conducted in two provinces; patients were tested for influenza viruses by real-time RT-PCR. Vaccination status was obtained from vaccine registries. Case and control patients were patients with nasopharyngeal swabs positive and negative for influenza viruses, respectively. Vaccine effectiveness (VE) was estimated for the 6 months after vaccination began. Logistic regression was used to evaluate the association between case status and vaccination while adjusting for age, province, medical conditions, and time. Results During 2010–2011, there were 1545 patients with ARI, of whom 279 (18%) were influenza-positive case patients and 1266 (82%) were influenza-negative control patients. Of the 279 case patients, 247 (89%) had influenza A and 32 (11%) had influenza B. Fourteen of 279 (5%) case patients and 108 of 1266 (9%) control patients were vaccinated against influenza. The unadjusted IIV effectiveness against hospitalization with influenza-associated ARI was 43% (95% CI: 0–68%); adjusted VE was 47% (95% CI: 5–71%). Conclusion The 2010 and 2011 IIVs were moderately effective against hospitalization with influenza-associated ARI among Thais aged ≥50 years, but IIV coverage was low. Additional efforts are warranted in Thailand to improve IIV uptake in this target group.
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- 2014
38. Incidence and Etiology of Acute Lower Respiratory Tract Infections in Hospitalized Children Younger Than 5 Years in Rural Thailand
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Somchai Chuananon, Somsak Thamthitiwat, Prabda Prapasiri, Pongpun Sawatwong, Reem Hasan, Dean D. Erdman, Henry C. Baggett, Prasong Srisaengchai, Possawat Jorakate, Susan A. Maloney, Sonja J. Olsen, Julia Rhodes, Sununta Henchaichon, Tussanee Amornintapichet, Surang Dejsirilert, Malinee Chittaganpitch, Sathapana Naorat, Anek Kaewpan, and Alicia M. Fry
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Male ,Rural Population ,Microbiology (medical) ,medicine.medical_specialty ,Pediatrics ,Developing country ,Bacteremia ,Article ,Epidemiology ,medicine ,Humans ,Pediatrics, Perinatology, and Child Health ,Respiratory Tract Infections ,medicine.diagnostic_test ,Respiratory tract infections ,business.industry ,Incidence ,Incidence (epidemiology) ,Public health ,Infant, Newborn ,Infant ,Pneumonia ,Thailand ,medicine.disease ,Hospitalization ,Infectious Diseases ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Etiology ,Female ,Chest radiograph ,business - Abstract
Pneumonia remains a leading cause of under-five morbidity and mortality globally. Comprehensive incidence, epidemiologic and etiologic data are needed to update prevention and control strategies.We conducted active, population-based surveillance for hospitalized cases of acute lower respiratory tract infections (ALRI) among children5 years of age in rural Thailand. ALRI cases were systematically sampled for an etiology study that tested nasopharyngeal specimens by polymerase chain reaction; children without ALRI were enrolled as controls from outpatient clinics.We identified 28,543 hospitalized ALRI cases from 2005 to 2010. Among the 49% with chest radiographs, 76% had findings consistent with pneumonia as identified by 2 study radiologists. The hospitalized ALRI incidence rate was 5772 per 100,000 child-years (95% confidence interval: 5707, 5837) and was higher in boys versus girls (incidence rate ratio 1.38, 95% confidence interval: 1.35-1.41) and in children 6-23 months of age versus other age groups (incidence rate ratio 1.76, 95% confidence interval: 1.69-1.84). Viruses most commonly detected in ALRI cases were respiratory syncytial virus (19.5%), rhinoviruses (18.7%), bocavirus (12.8%) and influenza viruses (8%). Compared with controls, ALRI cases were more likely to test positive for respiratory syncytial virus, influenza, adenovirus, human metapneumovirus and parainfluenza viruses 1 and 3 (P ≤ 0.01 for all). Bloodstream infections, most commonly Streptococcus pneumoniae and nontyphoidal Salmonella, accounted for 1.8% of cases.Our findings underscore the high burden of hospitalization for ALRI and the importance of viral pathogens among children in Thailand. Interventions targeting viral pathogens coupled with improved diagnostic approaches, especially for bacteria, are critical for better understanding of ALRI etiology, prevention and control.
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- 2014
39. Respiratory Syncytial Virus Circulation in Seven Countries With Global Disease Detection Regional Centers
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George Luber, Adel Mansour, John P. McCracken, Yuzhi Zhang, Erica Dueger, Godfrey Bigogo, Marietjie Venter, Marthi A. Pretorius, Cheryl Cohen, Somsak Thamthitiwat, Katharine Sturm-Ramirez, Nusrat Homaira, W. Abdullah Brooks, Mahmudur Rahman, Stephen P. Luby, Daniel R. Feikin, Kariuki Njenga, Jocelyn Moyes, Maria Renee Lopez, Marika K. Iwane, Henry C. Baggett, Deron C. Burton, Joel M. Montgomery, Faxian Zhan, Hongie Yu, Adam L. Cohen, Joe P. Bryan, Pongpun Sawatwong, Arie Manangan, Malinee Chittaganpitch, John D. Klena, Nahed Azazzy, Amber K. Haynes, Robert F. Breiman, and Susan I. Gerber
- Subjects
Adult ,Male ,China ,medicine.medical_specialty ,Climate ,viruses ,Developing country ,Respiratory Syncytial Virus Infections ,Subtropics ,Disease Outbreaks ,South Africa ,Lower respiratory tract infection ,parasitic diseases ,Epidemiology ,medicine ,Humans ,Immunology and Allergy ,Child ,Developing Countries ,Respiratory Tract Infections ,Weather ,Bangladesh ,Respiratory tract infections ,Infant ,International Agencies ,virus diseases ,respiratory system ,Seasonality ,Guatemala ,Thailand ,medicine.disease ,Kenya ,Arid ,Virology ,United States ,Infectious Diseases ,Geography ,Child, Preschool ,Population Surveillance ,Respiratory Syncytial Virus, Human ,Respiratory Syncytial Virus Vaccines ,Egypt ,Female ,Seasons ,Centers for Disease Control and Prevention, U.S ,Demography - Abstract
Background Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in young children globally, with the highest burden in low- and middle-income countries where the association between RSV activity and climate remains unclear. Methods Monthly laboratory-confirmed RSV cases and associations with climate data were assessed for respiratory surveillance sites in tropical and subtropical areas (Bangladesh, China, Egypt, Guatemala, Kenya, South Africa, and Thailand) during 2004-2012. Average monthly minimum and maximum temperatures, relative humidity, and precipitation were calculated using daily local weather data from the US National Climatic Data Center. Results RSV circulated with 1-2 epidemic periods each year in site areas. RSV seasonal timing and duration were generally consistent within country from year to year. Associations between RSV and weather varied across years and geographic locations. RSV usually peaked in climates with high annual precipitation (Bangladesh, Guatemala, and Thailand) during wet months, whereas RSV peaked during cooler months in moderately hot (China) and arid (Egypt) regions. In South Africa, RSV peaked in autumn, whereas no associations with seasonal weather trends were observed in Kenya. Conclusions Further understanding of RSV seasonality in developing countries and various climate regions will be important to better understand the epidemiology of RSV and for timing the use of future RSV vaccines and immunoprophylaxis in low- and middle-income countries.
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- 2013
40. Influenza antiviral resistance in the Asia-Pacific region during 2011
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Katie Lindsay, Ann-Claire Gourinat, Fahimeh Rahnamal, Robert Shaw, Paul F. Horwood, Osmali Osman, Jan Williamson, Frances Hammill, Philippe Buchy, Ian G. Barr, Naomi Komadina, William D. Rawlinson, Amado Tandoc, Jennifer Ridgway, Peng Kei Ip, Malinee Chittaganpitch, Dominic E. Dwyer, Q.S. Huang, Mohd Apandi Yusof, Avram Levy, Jacob L. Kool, I-Ching Sam, Tuckweng Kok, Cui Lin, Craig Redden, Sook Kwan Leang, Anne Kelso, Yi-Mo Deng, Suzanne Svobodova, Peter K. Fagan, Gina Papadakis, Geethani Wickramasinghe, Noelene J Wilson, Alison M. Kesson, Aeron C. Hurt, Pina Iannello, Lance C. Jennings, and Natalie Caldwell
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Oseltamivir ,Asia ,medicine.drug_class ,viruses ,Microbial Sensitivity Tests ,Pacific Islands ,medicine.disease_cause ,Antiviral Agents ,H5N1 genetic structure ,Microbiology ,Inhibitory Concentration 50 ,chemistry.chemical_compound ,Zanamivir ,Virology ,Influenza, Human ,Pandemic ,medicine ,Influenza A virus ,Humans ,Pharmacology ,biology ,Neuraminidase inhibitor ,business.industry ,virus diseases ,Outbreak ,biochemical phenomena, metabolism, and nutrition ,respiratory tract diseases ,Influenza B virus ,chemistry ,biology.protein ,business ,Neuraminidase ,medicine.drug - Abstract
Despite greater than 99% of influenza A viruses circulating in the Asia-Pacific region being resistant to the adamantane antiviral drugs in 2011, the large majority of influenza A (>97%) and B strains (∼99%) remained susceptible to the neuraminidase inhibitors oseltamivir and zanamivir. However, compared to the first year of the 2009 pandemic, cases of oseltamivir-resistant A(H1N1)pdm09 viruses with the H275Y neuraminidase mutation increased in 2011, primarily due to an outbreak of oseltamivir-resistant viruses that occurred in Newcastle, as reported in Hurt et al. (2011c, 2012a), where the majority of the resistant viruses were from community patients not being treated with oseltamivir. A small number of influenza B viruses with reduced oseltamivir or zanamivir susceptibility were also detected. The increased detection of neuraminidase inhibitor resistant strains circulating in the community and the detection of novel variants with reduced susceptibility are reminders that monitoring of influenza viruses is important to ensure that antiviral treatment guidelines remain appropriate.
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- 2013
41. Mortality attributable to seasonal influenza A and B infections in Thailand, 2005-2009 : a longitudinal study
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Nicholas P. J. Day, Surachai Kotirum, Direk Limmathurotsakul, Ben S. Cooper, Richard Coker, Wantanee Kulpeng, Yot Teerawattananon, Aronrag Meeyai, Naiyana Praditsitthikorn, and Malinee Chittaganpitch
- Subjects
Male ,Longitudinal study ,Epidemiology ,Original Contributions ,Disease ,burden ,Seasonal influenza ,Liver disease ,Influenza A Virus, H1N1 Subtype ,0302 clinical medicine ,Cause of Death ,Credible interval ,Longitudinal Studies ,030212 general & internal medicine ,seasonal variation ,education.field_of_study ,virus diseases ,Middle Aged ,Thailand ,3. Good health ,Bayesian regression ,Influenza A virus ,Female ,Seasons ,Adult ,Adolescent ,030231 tropical medicine ,Population ,Developing country ,tropics ,Young Adult ,03 medical and health sciences ,Age Distribution ,Influenza, Human ,medicine ,Humans ,Influenza epidemiology ,education ,business.industry ,Influenza A Virus, H3N2 Subtype ,developing country ,Bayes Theorem ,medicine.disease ,mortality ,Influenza ,Influenza B virus ,middle-income country ,Immunology ,business ,Sentinel Surveillance ,Demography - Abstract
Influenza epidemiology differs substantially in tropical and temperate zones, but estimates of seasonal influenza mortality in developing countries in the tropics are lacking. We aimed to quantify mortality due to seasonal influenza in Thailand, a tropical middle-income country. Time series of polymerase chain reaction-confirmed influenza infections between 2005 and 2009 were constructed from a sentinel surveillance network. These were combined with influenza-like illness data to derive measures of influenza activity and relationships to mortality by using a Bayesian regression framework. We estimated 6.1 (95% credible interval: 0.5, 12.4) annual deaths per 100,000 population attributable to influenza A and B, predominantly in those aged ≥60 years, with the largest contribution from influenza A(H1N1) in 3 out of 4 years. For A(H3N2), the relationship between influenza activity and mortality varied over time. Influenza was associated with increases in deaths classified as resulting from respiratory disease (posterior probability of positive association, 99.8%), cancer (98.6%), renal disease (98.0%), and liver disease (99.2%). No association with circulatory disease mortality was found. Seasonal influenza infections are associated with substantial mortality in Thailand, but evidence for the strong relationship between influenza activity and circulatory disease mortality reported in temperate countries is lacking.
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- 2016
42. Global Role and Burden of Influenza in Pediatric Respiratory Hospitalizations, 1982–2012: A Systematic Analysis
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Melissa J. Whaley, Malinee Chittaganpitch, Remigio M. Olveda, Marta Von Horoch, Adebayo Adedeji, Tran Hien Nguyen, Jean-Michel Heraud, Robert Booy, Daddi Jima, Vida Mmbaga, Stephen R. C. Howie, Julio Armero, Ricardo Mena, Radu Cojocaru, Marietjie Venter, Pagbajabyn Nymadawa, Thierry Nyatanyi, Daouda Coulibaly, Guiselle Guzman, Amal Barakat, Hongjie Yu, Mandeep S. Chadha, Harry Campbell, Andrew Corwin, Harish Nair, Mohammad Hafiz Rasooly, Daniel E. Noyola, Zuridin Nurmatov, Eduardo Azziz-Baumgartner, Ondri Dwi Sampurno, Andros Theo, Marc-Alain Widdowson, Kathryn E. Lafond, Joseph S. Bresee, William Ampofo, Fátima Valente, Mahmudur Rahman, Gideon O. Emukule, Paul Kitsutani, Terveystieteiden yksikkö - School of Health Sciences, University of Tampere, Centers for Disease Control and Prevention [Atlanta] (CDC), Centers for Disease Control and Prevention, University of Tampere [Finland], University of Edinburgh, Public Health Foundation of India, Afghanistan National Public Health Institute, National Directorate of Public Health, Westmead Hospital [Sydney], Institute of Epidemiology, Chinese Centre for Disease Control and Prevention, Caja Costarricense de Seguro Social, Institut Pasteur de Côte d'Ivoire, Réseau International des Instituts Pasteur (RIIP), Ministerio de Salud de El Salvador (MINSAL), Ethiopian Public Health Institute (EPHI), University of Auckland [Auckland], University of Otago [Dunedin, Nouvelle-Zélande], University of Ghana, Ministerio de Salud Publica y Asistencia Social [Guatemala] (MSPAS), National Institute of Virology, National Institute of Health Research and Development, Ministry of Health, Unité de Virologie [Antananarivo, Madagascar] (IPM), Institut Pasteur de Madagascar, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Universidad Autonoma de San Luis Potosi [México] (UASLP), National Centre for Public Health [Chisinau, Republic of Moldova], National Influenza Center, Ministry of Health [Morocco], Federal Ministry of Health, Ministerio de Salud Publica y Bienestar Social, Research Institute for Tropical Medicine, Department of Medical Virology, University of Pretoria [South Africa], National Institute for Communicable Diseases [Johannesburg] (NICD), Ministry of Public Health, National Institute of Hygiene and Epidemiology [Hanoi, Vietnam] (NIHE), University Teaching Hospital, and Funding for this study was provided entirely by the U.S. Centers for Disease Control and Prevention (CDC). The study was designed by the authors, and the results and conclusions do not necessarily reflect the official position of the CDC.
- Subjects
PNEUMONIA ,0301 basic medicine ,RNA viruses ,Pediatrics ,Viral Diseases ,Influenza Viruses ,Pulmonology ,Epidemiology ,lcsh:Medicine ,MESH: Global Health ,MESH: Hospitalization ,LABORATORY-CONFIRMED INFLUENZA ,Pathology and Laboratory Medicine ,0302 clinical medicine ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,MESH: Child ,Global health ,Medicine and Health Sciences ,Terveystiede - Health care science ,Public and Occupational Health ,030212 general & internal medicine ,Respiratory system ,Lower respiratory infection ,[SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseases ,MESH: Influenza, Human ,1. No poverty ,General Medicine ,Naisten- ja lastentaudit - Gynaecology and paediatrics ,MESH: Infant ,Vaccination and Immunization ,3. Good health ,Infectious Diseases ,INFECTIONS ,Medical Microbiology ,Vaccination coverage ,Viral Pathogens ,[SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology ,Viruses ,Geographic regions ,VIRUS ,Pathogens ,Pediatric Infections ,Developed country ,Research Article ,COUNTRIES ,AFRICA ,YOUNG-CHILDREN ,medicine.medical_specialty ,Infectious Disease Control ,Immunology ,UNITED-STATES ,SEASONAL INFLUENZA ,Disease Surveillance ,Microbiology ,Healthcare improvement science Radboud Institute for Health Sciences [Radboudumc 18] ,03 medical and health sciences ,medicine ,Microbial Pathogens ,MESH: Adolescent ,MESH: Humans ,Respiratory illness ,Biology and life sciences ,business.industry ,MORTALITY ,MESH: Child, Preschool ,lcsh:R ,Organisms ,[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology ,medicine.disease ,030112 virology ,MESH: Male ,Influenza ,Pneumonia ,Age Groups ,Infectious Disease Surveillance ,Respiratory Infections ,People and Places ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Population Groupings ,MESH: Respiratory Tract Diseases ,MESH: Epidemiological Monitoring ,Preventive Medicine ,business ,MESH: Female ,Orthomyxoviruses - Abstract
Background The global burden of pediatric severe respiratory illness is substantial, and influenza viruses contribute to this burden. Systematic surveillance and testing for influenza among hospitalized children has expanded globally over the past decade. However, only a fraction of the data has been used to estimate influenza burden. In this analysis, we use surveillance data to provide an estimate of influenza-associated hospitalizations among children worldwide. Methods and Findings We aggregated data from a systematic review (n = 108) and surveillance platforms (n = 37) to calculate a pooled estimate of the proportion of samples collected from children hospitalized with respiratory illnesses and positive for influenza by age group (, The substantial global burden of influenza infections in children is revealed by Lafond and colleagues. Children in developing countries are 3 times more likely to be hospitalised and treatments vary. This study highlights the need for vaccination programs in the young., Editors' Summary Background Acute lower respiratory infections—bacterial and viral infections of the lungs and airways (the tubes that take oxygen-rich air to the lungs)—are major causes of illness and death in children worldwide. Pneumonia (infection of the lungs) alone is responsible for 15% of deaths among children under five years old and kills nearly one million young children every year. Globally, infections with respiratory syncytial virus and with Streptococcus pneumoniae are associated with about 25% and 18.3%, respectively, of all episodes of severe respiratory infection in young children. Another infectious organism that contributes to the global burden of respiratory disease among children is the influenza virus. Every year, millions of people become infected with this virus, which infects the airways and causes symptoms that include a high temperature, tiredness and weakness, general aches and pains, and a dry chesty cough. Most infected individuals recover quickly, but seasonal influenza outbreaks (epidemics) nevertheless kill about half a million people annually, with the highest burden of severe disease being experienced by elderly people and by children under five years old. Why Was This Study Done? Annual immunization (vaccination) can reduce an individual’s risk of catching influenza, but before a country implements this preventative measure, policymakers need reliable estimates of the burden of influenza in their country. Although such estimates have been calculated for resource-rich countries with temperate climates, where influenza largely occurs in the winter, few estimates of influenza burden are available for resource-limited countries, which has hampered informed consideration of vaccination for influenza prevention in many settings. Recently, however, there has been a global expansion of systematic surveillance and testing for influenza virus among patients admitted to hospital for severe respiratory infection. Here, the researchers use this expanded surveillance data to provide an estimate of influenza-associated hospitalizations among children worldwide between 1982 and 2012. Specifically, they undertake a systematic review to identify published research articles on influenza-associated respiratory disease in hospitalized children, and, by aggregating the data from these articles with data collected by hospital-based influenza surveillance, they calculate a pooled estimate of the proportion of children hospitalized with respiratory disease who are positive for influenza. What Did the Researchers Do and Find? Using predefined search criteria, the researchers identified 108 published research articles that provided information on influenza-associated respiratory illness among hospitalized children. In addition, the Global Respiratory Hospitalizations–Influenza Proportion Positive (GRIPP) working group provided 37 hospital-based influenza surveillance datasets. By aggregating the data from these sources using a statistical approach called meta-analysis, the researchers calculated that, overall, influenza was associated with 9.5% of hospitalizations for severe respiratory infection among children under 18 years old worldwide, ranging from 4.8% among children under six months old to 16.4% among children aged 5–17 years. The researchers also calculated that, on average over the study period, influenza resulted in about 374,000 hospitalizations annually among children under one year old (including 228,000 hospitalizations among children less than six months old) and nearly one million hospitalizations annually among children under five years old. Finally, the researchers calculated that influenza-associated hospitalization rates among children under five years old over the study period were more than three times higher in resource-limited countries than in industrialized countries (150 and 48 hospitalizations, respectively, per 100,000 children per year). What Do These Findings Mean? Differences in hospitalization practices, in applications of case definitions, and in influenza testing protocols between settings may affect the accuracy of these findings. Specifically, the approach taken by the researchers may mean that their estimate of the total burden of severe respiratory disease due to influenza is an underestimate of the true situation. Even so, these findings suggest that influenza is an important contributor to hospitalizations for severe respiratory illness among children worldwide. Increasing influenza vaccination coverage among young children and pregnant women could, therefore, reduce the contribution that influenza makes to hospitalizations for respiratory infections among children. Importantly, the estimates of the burden of influenza provided by these findings can now be used by countries considering influenza vaccination programs for children and/or pregnant women to help them investigate the possible health and cost implications of such programs and should also stimulate further research into the development of effective influenza vaccines for young children. Additional Information This list of resources contains links that can be accessed when viewing the PDF on a device or via the online version of the article at http://dx.doi.org/10.1371/journal.pmed.1001977. The UK National Health Service Choices website provides information about respiratory infections, seasonal influenza, influenza vaccination, and influenza vaccination in children The World Health Organization provides information on seasonal influenza (in several languages) and on influenza vaccines The US Centers for Disease Control and Prevention also provides information for patients and health professionals on all aspects seasonal influenza, including information about vaccination, and about children, influenza, and vaccination; its website contains a short video about personal experiences of influenza Flu.gov, a US government website, provides access to information on seasonal influenza and vaccination MedlinePlus has links to further information about influenza and about vaccination (in English and Spanish)
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- 2016
43. Concurrent influenza virus infection and tuberculosis in patients hospitalized with respiratory illness in Thailand
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Susan A. Maloney, Somsak Thamthitiwat, Sara J. Whitehead, Sonja J. Olsen, Henry C. Baggett, Serena Roth, and Malinee Chittaganpitch
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Tuberculosis ,Epidemiology ,Orthomyxoviridae ,Virus ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,030212 general & internal medicine ,Young adult ,Intensive care medicine ,0303 health sciences ,Respiratory tract infections ,biology ,030306 microbiology ,business.industry ,Public Health, Environmental and Occupational Health ,Retrospective cohort study ,medicine.disease ,biology.organism_classification ,3. Good health ,Pneumonia ,Infectious Diseases ,Coinfection ,business - Abstract
Thailand, where influenza viruses circulate year-round, is one of 22 WHO-designated high-burden countries for tuberculosis (TB). Surveillance for hospitalized respiratory illness between 2003 and 2011 revealed 23 (
- Published
- 2012
44. Hospitalization due to human parainfluenza virus–associated lower respiratory tract illness in rural Thailand
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Yongjua Laosirithavorn, Dean D. Erdman, Sathapana Naorat, Wichai Sanasuttipun, Sonja J Olsen, Alicia M. Fry, Prabda Prapasiri, Birgit Clague, Teresa C. T. Peret, Oliver Morgan, Malinee Chittaganpitch, Henry C. Baggett, and Somrak Chantra
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Pulmonary and Respiratory Medicine ,Adult ,Male ,medicine.medical_specialty ,Pediatrics ,Adolescent ,Epidemiology ,Molecular Sequence Data ,Person years ,Part 1 ,Rural Health ,Young Adult ,medicine ,pneumonia ,Humans ,Young adult ,Intensive care medicine ,Child ,Respiratory Tract Infections ,Aged ,Paramyxoviridae Infections ,Respiratory tract infections ,business.industry ,Rural health ,Public Health, Environmental and Occupational Health ,Infant ,Original Articles ,Middle Aged ,medicine.disease ,Thailand ,Human parainfluenza viruses ,Hospitalization ,Human Parainfluenza Virus ,Pneumonia ,Infectious Diseases ,medicine.anatomical_structure ,Child, Preschool ,surveillance ,Paramyxovirinae ,Original Article ,Female ,business ,Respiratory tract - Abstract
Background Human parainfluenza viruses (HPIVs) are an important cause of acute respiratory illness in young children but little is known about their epidemiology in the tropics. Methods From 2003–2007, we conducted surveillance for hospitalized respiratory illness in rural Thailand. We performed reverse-transcriptase polymerase chain reaction on nasopharyngeal specimens and enzyme immunoassay on paired sera Results Of 10,097 patients enrolled, 573 (5%) of all ages and 370 (9%) of children
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- 2012
45. Assessment of potential public health impact of a quadrivalent inactivated influenza vaccine in Thailand
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Thanawadee Thantithaveewat, Yongjua Laosiritaworn, Wanitchaya Kittikraisak, Malinee Chittaganpitch, Kim A. Lindblade, Christopher J. Gregory, and Fatimah S. Dawood
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0301 basic medicine ,Pulmonary and Respiratory Medicine ,Quadrivalent Inactivated Influenza Vaccine ,medicine.medical_specialty ,Inactivated influenza vaccine ,Epidemiology ,Influenza vaccine ,Population ,Antibodies, Viral ,03 medical and health sciences ,Population estimate ,0302 clinical medicine ,Cost of Illness ,Influenza, Human ,Cost of illness ,Medicine ,Humans ,030212 general & internal medicine ,quadrivalent ,education ,education.field_of_study ,Models, Statistical ,trivalent ,business.industry ,Public health ,Incidence (epidemiology) ,Public Health, Environmental and Occupational Health ,virus diseases ,Original Articles ,Thailand ,030112 virology ,Virology ,Hospitalization ,Influenza B virus ,Infectious Diseases ,Vaccines, Inactivated ,Influenza Vaccines ,Original Article ,Public Health ,Seasons ,business ,Demography - Abstract
BACKGROUND Each year, an influenza B strain representing only one influenza B lineage is included in the trivalent inactivated influenza vaccine (IIV3); a mismatch between the selected lineage and circulating viruses can result in suboptimal vaccine effectiveness. We modeled the added potential public health impact of a quadrivalent inactivated influenza vaccine (IIV4) that includes strains from both influenza B lineages compared to IIV3 on influenza-associated morbidity and mortality in Thailand. METHODS Using data on the incidence of influenza-associated hospitalizations and deaths, vaccine effectiveness, and vaccine coverage from the 2007-2012 influenza seasons in Thailand, we estimated rates of influenza-associated outcomes that might be averted using IIV4 instead of IIV3. We then applied these rates to national population estimates to calculate averted illnesses, hospitalizations, and deaths for each season. We assumed that the influenza B lineage included in IIV3 would provide a relative vaccine effectiveness of 75% against the other B lineage. RESULTS Compared to use of IIV3, use of IIV4 might have led to an additional reduction ranging from 0·4 to 14·3 influenza-associated illnesses per 100 000 population/year
- Published
- 2015
46. High Prevalence of Cryptococcal Infection Among HIV-Infected Patients Hospitalized With Pneumonia in Thailand
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Sununta Henchaichon, Henry C. Baggett, Somrak Chantra, Fuangrak Ruamcharoen, Mark D. Lindsley, Julie R. Harris, Malinee Chittaganpitch, Susan A. Maloney, Natteewan Poonwan, Benjamin J. Park, Nanthawan Mehta, Leonard F. Peruski, Sathapana Naorat, Loretta S. Chang, and Prabda Prapasiri
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Adult ,Male ,Microbiology (medical) ,medicine.medical_specialty ,Antigens, Fungal ,Tuberculosis ,Adolescent ,Cryptococcus ,HIV Infections ,Meningitis, Cryptococcal ,Young Adult ,Risk Factors ,Electronic Article ,Internal medicine ,Prevalence ,medicine ,Humans ,Child ,Aged ,AIDS-Related Opportunistic Infections ,biology ,Respiratory tract infections ,business.industry ,Infant ,Respiratory infection ,Cryptococcosis ,Pneumonia ,Middle Aged ,Thailand ,biology.organism_classification ,medicine.disease ,Hospitalization ,Infectious Diseases ,Child, Preschool ,Immunology ,Etiology ,Female ,business ,Meningitis - Abstract
Cryptococcal antigenemia was common among human immunodeficiency virus-infected patients hospitalized with acute respiratory illness in Thailand. Few clinical differences were evident between antigenemic and nonantigenemic HIV-infected patients. Cryptococcal infection was a possible etiologic agent of pulmonary disease in many antigenemic patients., Background. Cryptococcal meningitis (CM) is a major cause of death among HIV-infected patients. Cryptococcal antigenemia (CrAg+) in the absence of CM can represent early-stage cryptococcosis during which antifungal treatment might improve outcomes. However, patients without meningitis are rarely tested for cryptococcal infection. We evaluated Cryptococcus species as a cause of acute respiratory infection in hospitalized patients in Thailand and evaluated clinical characteristics associated with CrAg+. Methods. We tested banked serum samples from 704 human immunodeficiency virus (HIV)–infected and 730 HIV-uninfected patients hospitalized with acute respiratory infection from 2004 through 2009 in 2 rural provinces in Thailand for the presence of CrAg+. Retrospective chart reviews were conducted for CrAg+ patients to distinguish meningeal and nonmeningeal cryptococcosis and to identify clinical characteristics associated with CrAg+ in patients with and without evidence of CM. Results. CrAg+ was found in 92 HIV-infected patients (13.1%); only tuberculosis (19.3%) and rhinovirus (16.5%) were identified more frequently. No HIV-uninfected patients were CrAg+. Of 70 CrAg+ patients with medical charts available, 37 (52.9%) had no evidence of past or existing CM at hospitalization; 30 of those patients (42.9% of all CrAg+) had neither past nor existing CM, nor any alternate etiology of infection identified. Dyspnea was more frequent among CrAg+ patients without CM than among CrAg– patients (P = .0002). Conclusions. Cryptococcus species were the most common pathogens detected in HIV-infected patients hospitalized with acute respiratory infection in Thailand. Few clinical differences were found between antigenemic and nonantigenemic HIV-infected patients. Health care providers in Thailand should evaluate HIV-infected patients hospitalized with acute respiratory infection for cryptococcal antigenemia, even in the absence of meningitis.
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- 2011
47. Influenza viruses in Thailand: 7 years of sentinel surveillance data, 2004-2010
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Sunthareeya Waicharoen, Krongkaew Supawat, Malinee Chittaganpitch, Pathom Sawanpanyalert, Passakorn Akrasewi, Scott Epperson, Lynnette Brammer, Sonja J Olsen, Thitipong Yingyong, and Sirima Patthamadilok
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Epidemiology ,Orthomyxoviridae ,medicine.disease_cause ,03 medical and health sciences ,0302 clinical medicine ,Pandemic ,medicine ,030212 general & internal medicine ,0303 health sciences ,Hemagglutination assay ,biology ,030306 microbiology ,business.industry ,Public health ,Public Health, Environmental and Occupational Health ,virus diseases ,biology.organism_classification ,Virology ,Influenza A virus subtype H5N1 ,3. Good health ,Vaccination ,Infectious Diseases ,Human mortality from H5N1 ,business - Abstract
Please cite this paper as: Chittaganpitch et al. (2012) Influenza viruses in Thailand: 7 years of sentinel surveillance data, 2004–2010. Influenza and Other Respiratory Viruses 6(4), 276–283. Background The re-emergence of avian influenza A (H5N1) in 2004 and the pandemic of influenza A (H1N1) in 2009 highlight the need for routine surveillance systems to monitor influenza viruses, particularly in Southeast Asia where H5N1 is endemic in poultry. In 2004, the Thai National Institute of Health, in collaboration with the US Centers for Disease Control and Prevention, established influenza sentinel surveillance throughout Thailand. Objectives To review routine epidemiologic and virologic surveillance for influenza viruses for public health action. Methods Throat swabs from persons with influenza-like illness and severe acute respiratory illness were collected at 11 sentinel sites during 2004–2010. Influenza viruses were identified using the standard protocol for polymerase chain reaction. Viruses were cultured and identified by immunofluorescence assay; strains were identified by hemagglutination inhibition assay. Data were analyzed to describe frequency, seasonality, and distribution of circulating strains. Results Of the 19 457 throat swabs, 3967 (20%) were positive for influenza viruses: 2663 (67%) were influenza A and able to be subtyped [21% H1N1, 25% H3N2, 21% pandemic (pdm) H1N1] and 1304 (33%) were influenza B. During 2009–2010, the surveillance system detected three waves of pdm H1N1. Influenza annually presents two peaks, a major peak during the rainy season (June–August) and a minor peak in winter (October–February). Conclusions These data suggest that March–April may be the most appropriate months for seasonal influenza vaccination in Thailand. This system provides a robust profile of the epidemiology of influenza viruses in Thailand and has proven useful for public health planning.
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- 2011
48. Evidence for Subclinical Avian Influenza Virus Infections Among Rural Thai Villagers
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Robert V. Gibbons, Krongkaew Supawat, Whitney S. Krueger, In-Kyu Yoon, Shannon D. Putnam, Pathom Sawanpanyalert, Gregory C. Gray, Gary L. Heil, Ana W. Capuano, John A. Friary, Sirima Pattamadilok, Benjawan Khuntirat, Malinee Chittaganpitch, and Patrick J. Blair
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Adult ,Male ,Rural Population ,Microbiology (medical) ,Veterinary medicine ,Swine ,Antibodies, Viral ,medicine.disease_cause ,Poultry ,Electronic Articles ,Virus ,Disease Outbreaks ,Serology ,Cohort Studies ,Young Adult ,Sex Factors ,Orthomyxoviridae Infections ,Risk Factors ,Influenza, Human ,Influenza A Virus, H9N2 Subtype ,medicine ,Influenza A virus ,Animals ,Humans ,Prospective Studies ,Risk factor ,Asymptomatic Infections ,Poultry Diseases ,Subclinical infection ,Influenza A Virus, H5N1 Subtype ,business.industry ,Transmission (medicine) ,Age Factors ,virus diseases ,Outbreak ,Middle Aged ,Thailand ,Influenza A virus subtype H5N1 ,Infectious Diseases ,Influenza in Birds ,Female ,business - Abstract
Background. Regions of Thailand reported sporadic outbreaks of A/H5N1 highly pathogenic avian influenza (HPAI) among poultry between 2004 and 2008. Kamphaeng Phet Province, in north-central Thailand had over 50 HPAI poultry outbreaks in 2004 alone, and 1 confirmed and 2 likely other human HPAI infections between 2004 and 2006. Methods. In 2008, we enrolled a cohort of 800 rural Thai adults living in 8 sites within Kamphaeng Phet Province in a prospective study of zoonotic influenza transmission. We studied participants’ sera with serologic assays against 16 avian, 2 swine, and 8 human influenza viruses. Results. Among participants (mean age 49.6 years and 58% female) 65% reported lifetime poultry exposure of at least 30 consecutive minutes. Enrollees had elevated antibodies by microneutralization assay against 3 avian viruses: A/Hong Kong/1073/1999(H9N2), A/Thailand/676/2005(H5N1), and A/Thailand/384/2006(H5N1). Bivariate risk factor modeling demonstrated that male gender, lack of an indoor water source, and tobacco use were associated with elevated titers against avian H9N2 virus. Multivariate modeling suggested that increasing age, lack of an indoor water source, and chronic breathing problems were associated with infection with 1 or both HPAI H5N1 strains. Poultry exposure was not associated with positive serologic findings. Conclusions. These data suggest that people in rural central Thailand may have experienced subclinical avian influenza infections as a result of yet unidentified environmental exposures. Lack of an indoor water source may play a role in transmission.
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- 2011
49. Distinct propagation efficiencies of H5N1 influenza virus Thai isolates in newly established murine respiratory region-derived cell clones
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Pathom Sawanpanyalert, Gui-Rong Bai, Yuta Kanai, Gui-Mei Li, Yong-Gang Li, Malinee Chittaganpitch, Izuru Nakamura, and Kazuyoshi Ikuta
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Cancer Research ,Virus Cultivation ,Cell ,Gene Expression ,Simian virus 40 ,Biology ,medicine.disease_cause ,Virus ,Cell Line ,Mice ,Dogs ,Virology ,Influenza A virus ,medicine ,Animals ,Humans ,Antigens, Viral, Tumor ,Mice, Inbred BALB C ,Expression vector ,Influenza A Virus, H5N1 Subtype ,Molecular biology ,Influenza A virus subtype H5N1 ,Mice, Inbred C57BL ,Infectious Diseases ,medicine.anatomical_structure ,Viral replication ,Cell culture ,Sialic Acids ,Receptors, Virus ,Immortalised cell line - Abstract
Inbred mice have been widely used for the study of influenza viruses as a mammalian model, while suitable cell lines derived from murine tissue have been limited. Here, we established several immortalized cell clones from respiratory regions of inbred mice (C57BL/6 and BALB/c) by transformation using simian virus 40 large T antigen expression vector. Twenty-five cell clones from C57/BL and BALB/c, designated as MRDC/C and MRDC/B series, respectively, showed different susceptibility to Thai isolates of influenza A virus H5N1. Two murine cell clones, C6 and B7 which were extensively studied expressed both SAα2,3 and SAα2,6 sialic acid receptors. Interestingly, the 6 Thai patient-derived H5N1 isolates examined showed varied virus propagation efficiency in murine cell clones, although there were only slight differences in their propagation in MDCK and A549 cell lines. The results indicate that the murine cell clones are useful for examining the propagation efficiency of H5N1 viruses in vitro.
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- 2010
50. The impact of antigenic drift of influenza A virus on human herd immunity: Sero-epidemiological study of H1N1 in healthy Thai population in 2009
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Pathom Sawanpanyalert, Gui-Rong Bai, Yuta Kanai, Yong-Gang Li, Malinee Chittaganpitch, Kazuo Takahashi, Kazuyoshi Ikuta, Tetsuo Kase, Naphatsawan Boonsathorn, Wipawee Jampangern, and Yoshinobu Okuno
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Immunity, Herd ,Male ,viruses ,animal diseases ,Orthomyxoviridae ,Biology ,medicine.disease_cause ,Antigenic drift ,Virus ,Neutralization ,Herd immunity ,Influenza A Virus, H1N1 Subtype ,Asian People ,Seroepidemiologic Studies ,Immunity ,Influenza, Human ,Influenza A virus ,medicine ,Humans ,Antigens, Viral ,Hemagglutination assay ,General Veterinary ,General Immunology and Microbiology ,Public Health, Environmental and Occupational Health ,Thailand ,biology.organism_classification ,Virology ,Infectious Diseases ,Influenza Vaccines ,Immunology ,Molecular Medicine ,Female - Abstract
To examine the effect of the antigenic drift of H1N1 influenza viruses on herd immunity, neutralization antibodies from 744 sera from Thai healthy volunteers in 2008-2009, who had not been vaccinated for at least the last 5 years, were investigated by microneutralization (MN) and hemagglutination inhibition (HI) assays. Significantly higher MN titers were observed for the H1N1 Thai isolate in 2006 than in 2008. The results indicate that the antigenically drifted virus effectively escaped herd immunity. Since the low neutralization activity of herd immunity against drifted viruses is an important factor for viruses to spread efficiently, continuous sero-epidemiological study is required for public health.
- Published
- 2010
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