19 results on '"Nghia Van Khuu"'
Search Results
2. Estimated Number of People who Inject Drugs in Ho Chi Minh City, Vietnam: Findings from a Two-survey Capture–Recapture Population Size Estimation Exercise
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Nghia Van Khuu, Phuc Duy Nguyen, Giang Tong Le, Hoa Thi Yen Luong, Van Thi Thu Tieu, Hau Phuc Tran, Thuong Vu Nguyen, Meade Morgan, and Abu S. Abdul-Quader
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Population size estimation ,people who inject drugs ,respondent-driven sampling ,Ho Chi Minh City ,Vietnam ,Public aspects of medicine ,RA1-1270 - Abstract
Background: HIV/AIDS program managers in Ho Chi Minh City (HCMC), Vietnam have always relied on the police reports and the UNAIDS Estimation and Projection Package for population size estimation of People Who Inject Drugs (PWID). Methods: We used Respondent-driven Sampling (RDS) to implement a two-source capture–recapture study to estimate the population size of PWID in HCMC in 2017. The study was implemented in seven out of 24 districts and included men and women ages 18 years and older who reported injecting illicit drugs in the last 90 days, and who had lived in the city for the past six months. Estimates of the PWID population size for each of the seven districts were calculated accounting for the RDS sampling design. These were then adjusted to account for the district sampling probabilities to give an estimate for HCMC. Chapman two-source capture–recapture estimates of population size, based on simple random sampling assumptions, were also calculated for comparison. Results: The estimates resulted in a population size for HCMC of 19,155 [95% Confidence Interval (CI): 17,006–25,039] using the RDS approach and 17,947 (95% CI: 15,968–19,928), using the Chapman approach. Conclusion: The two-survey capture–recapture exercise provided estimates of PWID in HCMC – based on Chapman estimator and RDS approach – are similar. For planning HIV prevention and care service needs among PWID in HCMC, both estimates may need to be taken into consideration together with size estimates from other sources.
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- 2020
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3. HIV infection, risk factors, and preventive services utilization among female sex workers in the Mekong Delta Region of Vietnam.
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Bach Xuan Tran, Thuong Vu Nguyen, Quang Duy Pham, Phuc Duy Nguyen, Nghia Van Khuu, Nhung Phuong Nguyen, Duc Hoang Bui, Huong Thu Thi Phan, and Long Thanh Nguyen
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Medicine ,Science - Abstract
BACKGROUND: Risk behaviors among female sex workers (FSW) are considerable drivers of HIV infections in Vietnam, especially transmission between high-risk and low-risk groups. We assessed HIV prevalence and its correlates among FSWs, and the use of preventive services among this community in the Mekong Delta region, southern Vietnam. METHODS: A cross-sectional survey of 1,999 FSWs was carried out in five provinces including Ben Tre, Hau Giang, Kien Giang, Tien Giang, and Vinh Long between June, 2006 and June, 2007. We interviewed participants face-to-face in order to elicit information about their lives and potential risk factors, and we tested their sera to determine their HIV status. We then performed multivariate logistic regression analyses to investigate factors associated with HIV infection. RESULTS: Seventeen percent of the participating FSWs were street-based sex workers (SSWs) and the rest (83%) were entertainment establishment-based sex workers (ESWs). Unprotected sex with regular and casual clients in the past month was frequent among study participants (40.5% and 33.5% respectively). However, few respondents (1.3%) had ever injected drugs. Only 2.1% (95% confidence interval (CI): 1.6%-2.8%) of FSWs were found to be infected with HIV. HIV prevalence among SSWs was greater than among ESWs (3.8% vs. 1.8%, p = 0.02, respectively). Increased risk for HIV infection was significantly associated with the number of clients per month (adjusted odd ratio (aOR) = 2.65, 95% CI: 1.26-5.59). CONCLUSIONS: Interventions to reduce unsafe sex and drug injection, and to increase uptake of HIV testing among FSWs are necessary. Differences in HIV prevalence and its correlates by type of sex work emphasize the importance of constrained contexts in shaping risk behaviors among FSWs; that should be considered in designing HIV prevention programs.
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- 2014
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4. Increases in both HIV and syphilis among men who have sex with men in Vietnam: Urgent need for comprehensive responses
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Canh D Hoang, Thu Q Le, Ton Tran, Lan T. Phan, Tu N Le, Phuc Duy Nguyen, Nghia Van Khuu, Thuong Vu Nguyen, Quang D Pham, and Hau P Tran
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Male ,China ,Adolescent ,Sexual Behavior ,Sexually Transmitted Diseases ,Human immunodeficiency virus (HIV) ,Prevalence ,HIV Infections ,Dermatology ,Logistic regression ,medicine.disease_cause ,Men who have sex with men ,Sexual and Gender Minorities ,Risk Factors ,Surveys and Questionnaires ,medicine ,Humans ,Pharmacology (medical) ,Syphilis ,Homosexuality, Male ,Sti prevention ,business.industry ,Public Health, Environmental and Occupational Health ,virus diseases ,medicine.disease ,Infectious Diseases ,Vietnam ,Residence ,Consistent condom ,business ,Demography - Abstract
The objective of this study was to determine the temporal trends and factors associated with HIV and syphilis infection among men who have sex with men (MSM) in southern Vietnam. Data from the 2014–2018 national HIV sentinel surveillance of MSM aged 16 years or older were collected from three provinces, including An Giang ( N = 761), Can Tho ( N = 900), and Ho Chi Minh City ( N = 1426), and examined for changes in prevalence rates of HIV and syphilis and risk behaviors over time. Multivariate logistic regression was performed to assess the trends and correlates of HIV and syphilis infections among MSM. There were upward trends for HIV (9.5% in 2014 to 14.2% in 2018, p-trend
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- 2021
5. Genome‐wide analysis of SARS‐CoV‐2 strains circulating in Vietnam: Understanding the nature of the epidemic and role of the D614G mutation
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Thang Minh Cao, Tung Xuan Trinh, Hang T. T. Pham, Nghia Van Khuu, Thao P. Huynh, Loan Kim Thi Huynh, Hieu T. Nguyen, Quang C Luong, Thinh V. Nguyen, Manh H. Dao, Quang D Pham, Dung T. Nguyen, Long T. Nguyen, Nhung H. P. Vu, Anh H. Nguyen, Thuong Vu Nguyen, Hung T Do, Hang Minh Nguyen, Hieu Cong Truong, Quan H. Nguyen, Lan T. Phan, and Trieu B Nguyen
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Adult ,Male ,Adolescent ,Short Communication ,Short Communications ,next‐generation sequencing ,Virulence ,Biology ,SARS‐CoV‐2 ,DNA sequencing ,law.invention ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,law ,Virology ,Quarantine ,Humans ,030212 general & internal medicine ,Phylogeny ,Aged ,Infectivity ,Whole genome sequencing ,Whole Genome Sequencing ,SARS-CoV-2 ,Transmission (medicine) ,COVID-19 ,Genetic Variation ,Outbreak ,Middle Aged ,D614G ,Infectious Diseases ,Vietnam ,Mutation ,Spike Glycoprotein, Coronavirus ,Regression Analysis ,Female ,030211 gastroenterology & hepatology ,Contact Tracing ,Contact tracing - Abstract
Genome‐wide analysis of severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) strains is essential to better understand infectivity and virulence and to track coronavirus disease 2019 (COVID‐19) cases and outbreaks. We performed whole‐genome sequencing of 27 SARS‐CoV‐2 strains isolated between January 2020 and April 2020. A total of 54 mutations in different genomic regions was found. The D614G mutation, first detected in March 2020, was identified in 18 strains and was more likely associated with a lower cycle threshold (
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- 2021
6. Prevalence and Determinants of Vaginal Infection With Human Papillomavirus Among Female University Students in Vietnam
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NGUYEN VAN TRANG, KIESHA PREM, ZHENG QUAN TOH, BUI THI VIET HA, PHAM THI NGOC LAN, HAU PHUC TRAN, QUANG DUY PHAM, NGHIA VAN KHUU, MARK JIT, DUNG THI LUU, LE THI KHANH LY, VAN CAO, TAM-DUONG LE-HA, KATHRYN BRIGHT, SUZANNE M. GARLAND, DANG DUC ANH, and KIM MULHOLLAND
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Pharmacology ,Cancer Research ,Health Knowledge, Attitudes, Practice ,Adolescent ,Universities ,Papillomavirus Infections ,virus diseases ,Uterine Cervical Neoplasms ,Alphapapillomavirus ,General Biochemistry, Genetics and Molecular Biology ,female genital diseases and pregnancy complications ,Cross-Sectional Studies ,Vietnam ,Prevalence ,Humans ,Female ,Papillomavirus Vaccines ,Students ,Papillomaviridae ,Research Article - Abstract
Background/Aim: Cervical cancer is the second most common malignancy among women in Vietnam, but the country is yet to introduce a national human papillomavirus (HPV) vaccine programme targeted at adolescents. We determined HPV prevalence and HPV vaccine knowledge among female university students in Vietnam. Patients and Methods: We surveyed and screened 1,491 female university students in Hanoi, Hue, and Ho Chi Minh City for their sexual behaviours, HPV knowledge and low- and high-risk HPV infection. Results: The prevalence of any HPV infection and any high-risk HPV infection were 4.2% (95%CI=3.3%-5.4%) and 3.4% (95%CI=2.5%-4.4%), respectively. Being sexually active [adjusted prevalence ratio (aPR): 6.22; 95%CI=3.4-11.37] and having ever been pregnant (aPR: 4.82; 95%CI=1.93-12.04) were positively associated with high-risk HPV infection. Whilst 60% of participants had heard of HPV vaccine, only 4.6% had received the vaccine. Conclusion: The low HPV prevalence found in university students in Vietnam indicates that they can benefit from HPV vaccination, along with a well-designed HPV health promotion programme.
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- 2021
7. Estimated Number of People who Inject Drugs in Ho Chi Minh City, Vietnam: Findings from a Two-survey Capture-Recapture Population Size Estimation Exercise
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Thuong Vu Nguyen, Abu S. Abdul-Quader, Hoa Thi Yen Luong, Nghia Van Khuu, Van Thi Thu Tieu, Phuc Duy Nguyen, Hau Phuc Tran, Giang Tong Le, and Meade Morgan
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Adult ,Male ,Adolescent ,people who inject drugs ,Population size estimation ,Ho Chi Minh City ,Mark and recapture ,Young Adult ,Acquired immunodeficiency syndrome (AIDS) ,Surveys and Questionnaires ,Sampling design ,Medicine ,Humans ,Cities ,Substance Abuse, Intravenous ,Estimation ,Population Density ,business.industry ,Population size ,lcsh:Public aspects of medicine ,Sampling (statistics) ,lcsh:RA1-1270 ,Middle Aged ,medicine.disease ,Simple random sample ,Confidence interval ,Vietnam ,respondent-driven sampling ,Female ,business ,Demography ,Research Article - Abstract
Background: HIV/AIDS program managers in Ho Chi Minh City (HCMC), Vietnam have always relied on the police reports and the UNAIDS Estimation and Projection Package for population size estimation of People Who Inject Drugs (PWID). Methods: We used Respondent-driven Sampling (RDS) to implement a two-source capture–recapture study to estimate the population size of PWID in HCMC in 2017. The study was implemented in seven out of 24 districts and included men and women ages 18 years and older who reported injecting illicit drugs in the last 90 days, and who had lived in the city for the past six months. Estimates of the PWID population size for each of the seven districts were calculated accounting for the RDS sampling design. These were then adjusted to account for the district sampling probabilities to give an estimate for HCMC. Chapman two-source capture–recapture estimates of population size, based on simple random sampling assumptions, were also calculated for comparison. Results: The estimates resulted in a population size for HCMC of 19,155 [95% Confidence Interval (CI): 17,006–25,039] using the RDS approach and 17,947 (95% CI: 15,968–19,928), using the Chapman approach. Conclusion: The two-survey capture–recapture exercise provided estimates of PWID in HCMC – based on Chapman estimator and RDS approach – are similar. For planning HIV prevention and care service needs among PWID in HCMC, both estimates may need to be taken into consideration together with size estimates from other sources.
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- 2020
8. Prevalence and Determinants of Vaginal Infection With Human Papillomavirus Among Female University Students in Vietnam.
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NGUYEN VAN TRANG, KIESHA PREM, ZHENG QUAN TOH, BUI THI VIET HA, PHAM THI NGOC LAN, HAU PHUC TRAN, QUANG DUY PHAM, NGHIA VAN KHUU, MARK JIT, DUNG THI LUU, LE THI KHANH LY, VAN CAO, TAM-DUONG LE-HA, KATHRYN BRIGHT, SUZANNE M. GARLAND, DANG DUC ANH, and KIM MULHOLLAND
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VAGINAL diseases ,HUMAN papillomavirus vaccines ,WOMEN college students ,HUMAN sexuality - Abstract
Background/Aim: Cervical cancer is the second most common malignancy among women in Vietnam, but the country is yet to introduce a national human papillomavirus (HPV) vaccine programme targeted at adolescents. We determined HPV prevalence and HPV vaccine knowledge among female university students in Vietnam. Patients and Methods: We surveyed and screened 1,491 female university students in Hanoi, Hue, and Ho Chi Minh City for their sexual behaviours, HPV knowledge and low- and high-risk HPV infection. Results: The prevalence of any HPV infection and any high-risk HPV infection were 4.2% (95%CI=3.3%- 5.4%) and 3.4% (95%CI=2.5%-4.4%), respectively. Being sexually active [adjusted prevalence ratio (aPR): 6.22; 95%CI=3.4-11.37] and having ever been pregnant (aPR: 4.82; 95%CI=1.93-12.04) were positively associated with high-risk HPV infection. Whilst 60% of participants had heard of HPV vaccine, only 4.6% had received the vaccine. Conclusion: The low HPV prevalence found in university students in Vietnam indicates that they can benefit from HPV vaccination, along with a well-designed HPV health promotion programme. [ABSTRACT FROM AUTHOR]
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- 2022
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9. Sociodemographic Factors, Sexual Behaviors, and Alcohol and Recreational Drug Use Associated with HIV Among Men Who Have Sex with Men in Southern Vietnam
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Thuong Vu Nguyen, Lan Trong Phan, Huong Thu Thi Phan, Nghia Van Khuu, Hau Phuc Tran, Phuc Duy Nguyen, and Roger Detels
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Male ,and promotion of well-being ,Cross-sectional study ,HIV Infections ,Men who have sex with men ,law.invention ,Condoms ,Alcohol Use and Health ,Substance Misuse ,0302 clinical medicine ,law ,Surveys and Questionnaires ,Prevalence ,2.2 Factors relating to the physical environment ,Medicine ,030212 general & internal medicine ,Aetiology ,Substance Abuse, Intravenous ,Substance Abuse ,virus diseases ,Homosexuality ,Recreational drug use ,Alcoholism ,Infectious Diseases ,Vietnam ,Public Health and Health Services ,HIV/AIDS ,Public Health ,Intravenous ,Infection ,0305 other medical science ,Adult ,Social Work ,medicine.medical_specialty ,Adolescent ,Social Psychology ,Recreational Drug ,Substance-Related Disorders ,Sexual Behavior ,Sexually Transmitted Diseases ,Sexual and Gender Minorities (SGM/LGBT*) ,Article ,Young Adult ,03 medical and health sciences ,Risk-Taking ,Condom ,Clinical Research ,Behavioral and Social Science ,Humans ,MSM ,Homosexuality, Male ,Psychiatry ,Harm reduction ,030505 public health ,Illicit Drugs ,business.industry ,Prevention ,Public health ,Public Health, Environmental and Occupational Health ,HIV ,Prevention of disease and conditions ,medicine.disease ,Cross-Sectional Studies ,Good Health and Well Being ,Risk factors ,Sexually Transmitted Infections ,3.1 Primary prevention interventions to modify behaviours or promote wellbeing ,Syphilis ,business ,Demography - Abstract
A total of 2768 MSM participated in a survey in southern Vietnam. Univariate and multivariate logistic regression analyses were performed to determine predictors of HIV infection. The prevalence of HIV among MSM was 2.6%. HIV infection was more likely in MSM who were older, had a religion, had engaged in anal sex with a foreigner in the past 12months, previously or currently used recreational drugs, perceived themselves as likely or very likely to be infected with HIV, and/or were syphilis seropositive. MSM who had ever married, were exclusively or frequently receptive, sometimes consumed alcohol before sex, and/or frequently used condoms during anal sex in the past 3months were less likely to be infected with HIV. Recreational drug use is strongly associated with HIV infection among MSM in southern Vietnam. HIV interventions among MSM should incorporate health promotion, condom promotion, harm reduction, sexually transmitted infection treatment, and address risk behaviors.
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- 2016
10. Viral load testing to monitor the HIV epidemic among PWID in Vietnam
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Van Thi Thu Tieu, Thuong Vu Nguyen, Duc H. Bui, Giang T. Le, Hau P Tran, Thinh X. Vu, Ton Tran, Nghia Van Khuu, Diep T. Vu, Huong Thu Thi Phan, Abu S. Abdul-Quader, Duong C. Thanh, Phuc Duy Nguyen, and Linh N. Nguyen
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Hiv epidemic ,Population ,Hiv testing ,ISDS 2018 Conference Abstracts ,Direct measure ,03 medical and health sciences ,0302 clinical medicine ,Acquired immunodeficiency syndrome (AIDS) ,Environmental health ,Medicine ,030212 general & internal medicine ,PWID ,education ,Hiv transmission ,General Environmental Science ,Plasma specimen ,education.field_of_study ,business.industry ,030503 health policy & services ,HIV sentinel surveillance ,medicine.disease ,Viral load testing ,3. Good health ,Vietnam ,General Earth and Planetary Sciences ,0305 other medical science ,business ,Viral load - Abstract
Objective: To share Vietnam’s experiences piloting the integration of viral load (VL) testing into the national HIV sentinel surveillance (HSS) system to better understand the level of HIV viral transmission among people who inject drugs (PWID). Introduction: Vietnam initiated the HSS system in 1994 in selected provinces with high HIV burden. The surveillance has two components: monitor HIV sero-prevalence and risk behaviors among key population including PWID. However, no VL data were collected among HIV infected people. In 2016, Vietnam piloted an added component of VL testing to the existing HSS system. The purpose was to test the feasibility of adding VL testing to the HSS so that VL data among PWID would be available. The pilot was conducted in two provinces in southern Vietnam-Ho Chi Minh City and Long An. It was expected that adding the VL testing to the existing HSS would also save resources and help monitor HIV viral transmission among PWID in the community regardless if they are currently on anti-retroviral therapy (ART). Methods: Male PWIDs were enrolled into 2016 HSS+ following the standard operating procedure (SOP) [1] . Community-based sampling was based on random selection of wards/communes listed in the sampling frame. In each selected ward/commune, all eligible PWID were invited to voluntarily participate in the survey. Eligibility criteria were males 16 years of age or older, reporting injecting drug in the past month, and residing in the selected area. . The survey included an interview using a standardized questionnaire and 7ml blood drawn for HIV testing. Blood specimens were transferred from districts to provincial labs for plasma separation in the same day. Each plasma specimen was divided into three aliquots of 1ml each. One aliquot was used to test for HIV diagnosis at provincial labs, using the national HIV testing strategy III [2] . The remaining 2 aliquots were stored at provincial labs at 2-8 0 C and within 5 days, were shipped to Pasteur Institute in Ho Chi Minh City (PIHCM) where the plasma specimens were stored at -80 0 C. Processing of samples for VL testing was conducted at the end of the survey where all plasma specimen were transferred to PIHCM lab, which was 2 months since the collection of the first blood specimen. VL was undertaken on COBAS AMPLYPREP/COBAS TAQMAN 48, with identification threshold 20 cps/ml and specificity of 100% using Kit CAP-G/CTM HIV-1 V 2.0. The VL testing results were sent back to relevant Provicial AIDS Centers to return to respective participants, within 3 months. Results: Five hundred male PWID (HCMC: 300; LA: 200) were enrolled into 2016 HSS/HSS+ and agreed to provide blood specimen without any refusal. 84 tested positive for HIV (16.8%. HCMC: 15.0%; LA: 19.5%), 43 (51.2%) specimens had unsuppressed VL (>1000 copies/ml) (HCMC: 66.7%; LA: 33.3%), 35 (41.7%) specimens had undetected level (
- Published
- 2018
11. Application of tablet for data collection in HIV sentinel surveillance in Vietnam
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Duc H. Bui, Giang T. Le, Duong C. Thanh, Ha T. Nguyen, Lo T. Dang, Tuan Anh Nguyen, Diep T. Vu, Huong Thu Thi Phan, and Nghia Van Khuu
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tablet ,data collection ,Data collection ,business.industry ,Computer science ,mobile device ,ISDS 2018 Conference Abstracts ,medicine.disease ,Data flow diagram ,Data access ,Backup ,Analytics ,Data quality ,medicine ,General Earth and Planetary Sciences ,Survey data collection ,The Internet ,Medical emergency ,HSS ,business ,HSS+ ,General Environmental Science - Abstract
Objective To describe the implementation process, successes, challenges, and lessons learned of the application of tablet for data collection and data system in HIV sentinel surveillance in Vietnam Introduction Vietnam has routinely monitored HIV sero-prevalence among key populations through its HIV sentinel surveillance system (HSS). In 2010, this system was updated to include a behavioral component (HSS+) among people who inject drugs, female sex workers, and men who have sex with men. HSS+ has historically used a paper-based questionnaire for data collection (1) . At the end of the survey, provincial data were manually entered into computers using EpiData Entry forms (http://www.epidata.dk/) and submitted to the Vietnam Authority of HIV/AIDS Control (VAAC). As a result, feedback to provinces on data issues was not provided until after fieldwork completion. One recent survey used tablets for data collection and found that it saved time, required fewer staff, and reduced costs compared to paper-based data collection (2) . In 2017, Vietnam introduced tablet for behavioral data collection in HSS+ to improve data quality, resource saving, and to provide more timely access to data. Methods Development of data entry forms and data system Survey data entry forms were designed using free Epi Info ™ software for mobile devices (3) and installed on tablets. A SQL database was established via SFPT data transfer to the current database in VAAC’s server. Field data were instantly synced to the national database when the internet signal was available (Picture 1). Real-time data analysis was granted to surveillance staff at all levels using authorized access to the database via Epi Info ™ Cloud Data Analytics (ECDA), dashboards were used to track progress and data quality (Figure 1). HSS+ data were frequently reviewed by the National Surveillance Technical Working Group (NSTWG) and timely feedback was provided. Deployment Manuals and e-leaning materials were developed. The NSTWG conducted a pilot to test the forms and data flow from field to the national database before installed into all tablets. Four to seven tablets were distributed to each province depending on number of HSS+ sites and populations. Surveillance staff at Provincial AIDS Centers (PACs) were trained by the NSTWG on how to use the tablet to interview, check, update, save data, and sync data to cloud and to the national database, and to backup the provincial dataset. They then provided trainings to their local field staff. The NSTWG provided technical assistance and troubleshooting through field visits and online support to help local staff address issues regarding tablet use in addition to other HSS/HSS+ issues. Results Currently, 18 HSS+ provinces have implemented the 2017 HSS+. Of these, nine provinces applied tablets exclusively. Two provinces used tablets, but also used paper-based questionnaires when not enough tablets were available. Seven Global Fund supported provinces used the paper-based questionnaires and entered data into tablets after interview completion due to copies of completed paper-based questionnaires are required by these provincial project management units (PMU) for fund re-imbursement. Additional updates were required after the first few days, which created issues around updating forms once revised forms were sent out by NSTWG. Another challenge was that local staff were not familiar with using tablets at the beginning. Also frequent complaints were mainly on data entry and synchronization regarding participant identity code or a record could not be synced. The NSTWG and PAC staff were able to monitor the HSS+ progress and provided feedback daily. Most commonly, feedbacks were provided on participant codings and site names. Using the tablet did not require staff, time or money for data entry and eliminated data entry errors. In general, staff prefered to use this data collection mode. Conclusions This mobile device application for data collection in routine HSS+ in Vietnam is feasible and accepted. However, harmonization and coordination from the central Global Fund PMU and provincial PMU will be required to successfully roll-out this system in all HSS+ provinces. This application in addition to ECDA help to improve data quality, due to timeliness of the data, is cost saving and reduces workload. Most importantly, better quality and timely data will facilitate preparation for timely local planning and response. References 1. Thanh DC et al. Brief behavioural surveys in routine HIV sentinel surveillance: a new tool for monitoring the HIV epidemic in Vietnam. Western Pacific Surveillance and Response Journal. Vol 6, No. 1/2015 2. National Institute of Hygiene and Epidemiology. HIV/STI Integrated Biological and Behavioural Surveillance in Vietnam. Hanoi, 2014. 3. https://www.cdc.gov/epiinfo/mobile.html
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- 2018
12. Return of test results in Vietnam HIV sentinel surveillance: Implementation and preliminary results
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Diep T. Vu, Giang T. Le, Sheryl B. Lyss, Huong Thu Thi Phan, Nghia Van Khuu, Duong C. Thanh, Duc H. Bui, and Abu S. Abdul-Quader
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medicine.medical_specialty ,business.industry ,Human immunodeficiency virus (HIV) ,virus diseases ,Survey sampling ,HIV ,sentinel surveillance ,ISDS 2018 Conference Abstracts ,medicine.disease ,medicine.disease_cause ,Men who have sex with men ,Test (assessment) ,Acquired immunodeficiency syndrome (AIDS) ,Quality of life ,Vietnam ,Phone ,Family medicine ,medicine ,General Earth and Planetary Sciences ,test return ,Serostatus ,business ,General Environmental Science - Abstract
Objective To describe the implementation and preliminary results of returning HIV test results to participants in Vietnam HIV sentinel surveillance. Introduction Knowledge of one’s HIV serostatus helps improve quality of life for those who test positive and decreases the risk of HIV transmission. WHO recommends that all participants in HIV prevalence surveys be provided access to their test results, especially those who test HIV positive [1]. Anonymous Vietnam HIV sentinel surveillance (HSS), implemented since 1994, focuses on people who inject drugs (PWID), female sex workers (FSW), and men who have sex with men (MSM) [2]. According to national guidelines, the HIV testing algorithm for surveillance purposes was based on two tests whereas the diagnostic algorithm for individuals was based on three tests. Thus, surveillance test results could not be returned to participants [3] who were instead encouraged to learn their HIV serostatus by testing at public confirmatory testing sites. In 2015, a three-test strategy was applied as part of HSS so that test results could be returned to participants. Methods In 2015, return of HIV test results was implemented as a pilot in 16 HSS provinces. HSS participants were asked to identify which of the designated HIV testing and counselling centers (HTC) in the province was most convenient for them. Participants were then given appointment cards with an assigned survey ID to receive their test results at the chosen venue at a specific date and time. Specimens, with assigned survey IDs, were transferred to the respective HIV laboratory at the Province AIDS Center (PAC) for confirmatory testing. The same three-test algorithm was used for surveillance purposes as well as to return confirmatory test results to participants [3]. Final test results were classified as “positive”, “negative” or “indeterminate”. HIV confirmatory test results were made available at all designated HTC in the provinces within 10 days after blood collection; thus, if a participant presented at a location, date or time that differed from the appointment card, s/he could still receive the test result. In some settings in which provinces integrated HSS with either static or mobile HTC, three rapid tests were used at point-of-care so that same-day test results were available. In this case, participants received test results at the end of the specified time regardless of their infection status. At the HTC, individuals showed their appointment cards. The IDs were used to identify the correct test results which were then given verbally to participants by HTC counsellors. Test results were not returned by phone or email. Individuals who tested positive were immediately referred to HIV treatment and other available health/social services in the province. The proportion of participants who received their test results was calculated for each survey group and province. Results The number of provinces that reported returning of HIV test results in 2015 and 2016 were 14 and 15, respectively. Overall, among 15,530 persons tested through HSS in 2015 and 2016, 7,354 persons returned to receive their test results. The proportion of participants who returned for test results varied by province and survey population (table 1). In some provinces where HSS was integrated with HTC, such as Hai Phong and Dong Thap, 100% of participants received their test results within a day [4]. Conclusions Returning HIV test results to HIV surveillance participants is feasible and beneficial in low-income countries like Vietnam. This enhancement facilitates participants learning their serostatus and contributes toward Vietnam’s achievement of HIV control [4]. Based on the pilot experiences, Vietnam Ministry of Health decided to extend test result notifications to all 20 HSS provinces in 2017. Key factors that contributed to the success of the activity were fast turnaround time, roles and level of commitment of PAC, and coordination between the survey and HTC. The returning rate in HSS 2015 and 2016 are promising but these could be improved further. Better coordination and commitment between the survey and HIV testing service are needed to further increase return rates so that HIV-positive individuals can learn their serostatus and be better linked to care and treatment services. References 1. WHO, Guidelines for second generation HIV surveillance: An update: Know your epidemic, 2013. 2. VAAC, Guidance for epidemiological surveillance of HIV/AIDS & sexually transmitted infections , 2012. 3. MOH, National guideline on HIV serology testing , in Decision 1098/QD-BYT , 2013. 4. VAAC, Primarily results of HSS, 2016.
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- 2018
13. Refocusing the Vietnam HIV surveillance to the most burden areas for epidemic control
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Huong Thu Thi Phan, Giang T. Le, Diep T. Vu, Abu Abdel-Quader, Nghia Van Khuu, Duc H. Bui, and Duong C. Thanh
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Prioritization ,Government ,Psychological intervention ,sentinel surveillance ,ISDS 2018 Conference Abstracts ,medicine.disease ,Men who have sex with men ,Geography ,Acquired immunodeficiency syndrome (AIDS) ,Sample size determination ,Environmental health ,medicine ,General Earth and Planetary Sciences ,HIV/AIDS ,Epidemic control ,Hiv surveillance ,General Environmental Science ,policy - Abstract
ObjectiveTo describe an exercise to identify priority provinces to be focused in the Vietnam National HIV Sentinel Surveillance (HSS).IntroductionThe Vietnam National HSS was established in 1994. In the late 1990s and early 2000s, when the epidemic was increasing rapidly, the HSS helped with the intensive close monitoring of the HIV epidemic. In its first 10 years, the HSS was rapidly expanded from 6 to 40 provinces and in some years, it was conducted semi-annually. After two decades, the HIV epidemic situation has changed. In most provinces, HIV prevalence has reported to have declined. Compared to the peak period, the HIV prevalence among key populations (KP) in the past decade decreased from 40-60% to 20% or lower. In many provinces, HIV prevalence was less than 10% among people who inject drugs (PWID) and less than 3% among female sex workers (FSW), and among men who have sex with men (MSM) (Table 1). At the same time, the HIV programme has since been scaled up widely with various interventions and expanded to most of the 63 provinces. In 2014, the government of Vietnam and international stakeholders conducted a joint review of the health sector response to the HIV epidemic and concluded that for better monitoring of the epidemic, a more focused and higher quality surveillance system was needed(1). In 2015, surveillance stakeholders conducted a detailed review of the HSS to discuss prioritization of the surveillance activities.MethodsThe prioritization exercise followed a principle that the HSS should be conducted in locations where there is a large population of KP with a high HIV prevalence and it is feasible to implement. Criteria for prioritizing provinces for inclusion were: 1) a high estimated KP size; 2) high HIV prevalence, measured as a 5 year (2011-2015) average prevalence (P); 3) few years with low HIV prevalence, defined as P
- Published
- 2018
14. Pretreatment HIV-1 drug resistance to first-line drugs: results from a baseline assessment of a large cohort initiating ART in Vietnam, 2009-10
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Lei Zhang, Yen Ngoc Le, Lien Xuan Truong, Duc B. Nguyen, Michelle S. McConnell, Phuc Duy Nguyen, Duong Duc Bui, Nghia Van Khuu, Thuong Vu Nguyen, Long Thanh Nguyen, Thu Khanh Hoang Huynh, Nhan Thi Do, Hai Huu Nguyen, Quang Duy Pham, Anh Que Luong, and Hien Bui
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Adult ,Male ,Microbiology (medical) ,medicine.medical_specialty ,Genotype ,Vietnamese ,Population ,HIV Infections ,Drug resistance ,Logistic regression ,Article ,Cohort Studies ,Acquired immunodeficiency syndrome (AIDS) ,Internal medicine ,Drug Resistance, Viral ,Prevalence ,medicine ,Humans ,Outpatient clinic ,Pharmacology (medical) ,education ,Genotyping ,Pharmacology ,education.field_of_study ,business.industry ,Sequence Analysis, DNA ,medicine.disease ,language.human_language ,Infectious Diseases ,Anti-Retroviral Agents ,Vietnam ,Immunology ,HIV-1 ,language ,Female ,business ,Viral load - Abstract
Objectives The objective of this study was to determine the prevalence and correlates of pretreatment drug resistance (PDR) to first-line antiretroviral drugs among people initiating therapy for HIV in Vietnam. Methods Blood was collected during November 2009 to October 2010 from people consecutively initiating ART in four purposively selected public outpatient clinics in three Vietnamese cities. At each study site, recruitment lasted for 6-10 months until the target sample size (range 120-130 individuals) had been reached. The viral load was measured in 501 samples; 490 samples (viral load ≥1000 copies/mL) were genotyped using a nucleotide population-based sequencing assay. Self-reported demographic and clinical data were elicited through interviews. We classified drug-resistance-associated mutations (DRMs) according to the 2009 WHO surveillance list. Results DRMs were identified in 17/490 participants (3.5%; 95% CI 2.2%-5.5%). The prevalence of DRMs was 1.6% (8/490) against NRTIs, 1.6% (8/490) against NNRTIs and 0.8% (4/490) against PIs; three (0.6%) participants were resistant to both NRTIs and NNRTIs. The overall prevalence of PDR to first-line drugs was low [2.7% (13/490); 95% CI 1.6%-4.4%]. The prevalence of PDR to first-line drugs was greater among 198 HIV-infected participants who injected drugs than among 286 participants who reported risks for sexually acquired HIV (4.0% versus 1.4%, P = 0.079). Multivariable logistic regression analysis suggested that PDR to first-line drugs was significantly higher among people who injected drugs (OR = 3.94; 95% CI 1.13-13.68). Conclusions With low PDR, first-line ART may be effective in Vietnam and pretreatment genotyping may be unnecessary. Continuing strategies for the prevention and surveillance of antiretroviral resistance are important for maintaining a low prevalence of antiretroviral resistance in Vietnam. The association between resistance and injection drug use warrants further research.
- Published
- 2014
15. Population Size Estimation of Venue-Based Female Sex Workers in Ho Chi Minh City, Vietnam: Capture-Recapture Exercise
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Hau Phuc Tran, Meade Morgan, Hoa Thi Yen Luong, Phuc Duy Nguyen, Van Thi Thu Tieu, Quang Duy Pham, Giang Tong Le, Nghia Van Khuu, Thuong Vu Nguyen, and Abu S. Abdul-Quader
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020205 medical informatics ,capture-recapture ,Distribution (economics) ,Health Informatics ,Sample (statistics) ,Ho Chi Minh City ,02 engineering and technology ,Mark and recapture ,03 medical and health sciences ,0302 clinical medicine ,population size estimation ,0202 electrical engineering, electronic engineering, information engineering ,030212 general & internal medicine ,female sex workers ,Estimation ,Original Paper ,business.industry ,Population size ,Public Health, Environmental and Occupational Health ,Sampling (statistics) ,Female sex ,Ho chi minh ,3. Good health ,venue-based ,Geography ,business ,Demography - Abstract
Background There is limited population size estimation of female sex workers (FSWs) in Ho Chi Minh City (HCMC)-the largest city in Vietnam. Only 1 population size estimation among venue-based female sex workers (VFSWs) was conducted in 2012 in HCMC. Appropriate estimates of the sizes of key populations are critical for resource allocation to prevent HIV infection. Objective The aim of this study was to estimate the population size of the VFSWs from December 2016 to January 2017 in HCMC, Vietnam. Methods A multistage capture-recapture study was conducted in HCMC. The capture procedures included selection of districts using stratified probability proportion to size, mapping to identify venues, approaching all VFSWs to screen their eligibility, and then distribution of a unique object (a small pink makeup bag) to all eligible VFSWs in all identified venues. The recapture exercise included equal probability random selection of a sample of venues from the initial mapping and then approaching FSWs in those venues to determine the number and proportion of women who received the unique object. The proportion and associated confidence bounds, calculated using sampling weights and accounting for study design, were then divided by the number of objects distributed to calculate the number of VFSWs in the selected districts. This was then multiplied by the inverse of the proportion of districts selected to calculate the number of VFSWs in HCMC as a whole. Results Out of 24 districts, 6 were selected for the study. Mapping identified 573 venues across which 2317 unique objects were distributed in the first capture. During the recapture round, 103 venues were selected and 645 VFSWs were approached and interviewed. Of those, 570 VFSWs reported receiving the unique object during the capture round. Total estimated VFSWs in the 6 selected districts were 2616 (95% CI 2445-3014), accounting for the fact that only 25% (6/24) of total districts were selected gives an overall estimate of 10,465 (95% CI 9782-12,055) VFSWs in HCMC. Conclusions The capture-recapture exercise provided an estimated number of VFSWs in HCMC. However, for planning HIV prevention and care service needs among all FSWs, studies are needed to assess the number of sex workers who are not venue-based, including those who use social media platforms to sell services.
- Published
- 2019
16. Correlation Between HIV and Sexual Behavior, Drug Use, Trichomoniasis and Candidiasis Among Female Sex Workers in a Mekong Delta Province of Vietnam
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Nghia Van Khuu, Lien Xuan Thi Truong, Roger Detels, Thuong Vu Nguyen, Anh Phuong Nguyen, and Phong Hoai Truong
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Adult ,medicine.medical_specialty ,Adolescent ,Social Psychology ,Substance-Related Disorders ,Sexually Transmitted Diseases ,Trichomonas Infections ,HIV Infections ,urologic and male genital diseases ,Article ,law.invention ,Interviews as Topic ,Young Adult ,Condom ,Risk Factors ,law ,Prevalence ,medicine ,Humans ,Syringe ,Sex work ,Gynecology ,Trichomoniasis ,Unsafe Sex ,business.industry ,Public health ,Age Factors ,Candidiasis ,Public Health, Environmental and Occupational Health ,virus diseases ,Middle Aged ,medicine.disease ,Health Surveys ,Sex Work ,Health psychology ,Infectious Diseases ,Socioeconomic Factors ,Vietnam ,Structured interview ,HIV-1 ,Female ,business ,Demography ,Methadone ,medicine.drug - Abstract
To determine the prevalence of HIV and correlates of HIV infection among female sex workers (FSWs) in Soc Trang province, Vietnam, a survey of 406 FSWs in Soc Trang province was conducted between May and August, 2003. The participants were interviewed, using a standardized interview, to obtain information about socio-demographic and behavioral characteristics, and gynecologic and sexually transmitted infection (STI) history. The prevalence of HIV was 3.3%. An increased risk for HIV was associated with ever using illicit drugs, direct sex work, early sexual debut, age of FSWs, and infection with candidiasis and trichomoniasis. Reduced likelihood of HIV was only associated with withdrawal as a contraceptive method. A strong association of HIV with drug use and candidiasis and trichomoniasis infection among FSWs was found. Needle/syringe exchange, STI treatment, and methadone programs targeting FSWs should be implemented, and should include 100% condom use promotion.
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- 2008
17. HIV Infection, Risk Factors, and Preventive Services Utilization among Female Sex Workers in the Mekong Delta Region of Vietnam
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Duc H. Bui, Long Thanh Nguyen, Bach Xuan Tran, Nghia Van Khuu, Huong Thu Thi Phan, Thuong Vu Nguyen, Quang Duy Pham, Nhung Nguyen, and Phuc Duy Nguyen
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Gerontology ,Non-Clinical Medicine ,Cross-sectional study ,Epidemiology ,Psychological intervention ,lcsh:Medicine ,HIV Infections ,Logistic regression ,Unsafe Sex ,Risk Factors ,Surveys and Questionnaires ,Prevalence ,Medicine ,Young adult ,lcsh:Science ,Animal Management ,Drug injection ,Multidisciplinary ,Animal Behavior ,Transmission (medicine) ,virus diseases ,HIV diagnosis and management ,Vietnam ,HIV epidemiology ,Infectious diseases ,Female ,Research Article ,Adult ,Sexual Behavior ,HIV prevention ,Sexually Transmitted Diseases ,Viral diseases ,Infectious Disease Epidemiology ,Sexual and Gender Issues ,Young Adult ,Humans ,Biology ,Sex work ,Health Care Policy ,Sex Workers ,Population Biology ,business.industry ,lcsh:R ,HIV ,Cross-Sectional Studies ,lcsh:Q ,Veterinary Science ,business ,Demography - Abstract
BACKGROUND: Risk behaviors among female sex workers (FSW) are considerable drivers of HIV infections in Vietnam, especially transmission between high-risk and low-risk groups. We assessed HIV prevalence and its correlates among FSWs, and the use of preventive services among this community in the Mekong Delta region, southern Vietnam. METHODS: A cross-sectional survey of 1,999 FSWs was carried out in five provinces including Ben Tre, Hau Giang, Kien Giang, Tien Giang, and Vinh Long between June, 2006 and June, 2007. We interviewed participants face-to-face in order to elicit information about their lives and potential risk factors, and we tested their sera to determine their HIV status. We then performed multivariate logistic regression analyses to investigate factors associated with HIV infection. RESULTS: Seventeen percent of the participating FSWs were street-based sex workers (SSWs) and the rest (83%) were entertainment establishment-based sex workers (ESWs). Unprotected sex with regular and casual clients in the past month was frequent among study participants (40.5% and 33.5% respectively). However, few respondents (1.3%) had ever injected drugs. Only 2.1% (95% confidence interval (CI): 1.6%-2.8%) of FSWs were found to be infected with HIV. HIV prevalence among SSWs was greater than among ESWs (3.8% vs. 1.8%, p = 0.02, respectively). Increased risk for HIV infection was significantly associated with the number of clients per month (adjusted odd ratio (aOR) = 2.65, 95% CI: 1.26-5.59). CONCLUSIONS: Interventions to reduce unsafe sex and drug injection, and to increase uptake of HIV testing among FSWs are necessary. Differences in HIV prevalence and its correlates by type of sex work emphasize the importance of constrained contexts in shaping risk behaviors among FSWs; that should be considered in designing HIV prevention programs.
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- 2014
18. Prevalence of HIV/STIs and associated factors among men who have sex with men in An Giang, Vietnam
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Lei Zhang, Van Cao, David Wilson, Anh Hoang Mai, Huu Ngoc Tran, Thuong Vu Nguyen, Cuong Q. Hoang, Huong Thu Thi Phan, Nghia Van Khuu, and Quang Duy Pham
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Microbiology (medical) ,Adult ,Male ,medicine.medical_specialty ,Adolescent ,Cross-sectional study ,Sexual Behavior ,Population ,HIV Infections ,Dermatology ,Serology ,Men who have sex with men ,Gonorrhea ,Young Adult ,Risk Factors ,Surveys and Questionnaires ,Transgender ,Urethral Diseases ,medicine ,Prevalence ,Humans ,Syphilis ,Homosexuality, Male ,education ,Reproductive health ,Gynecology ,education.field_of_study ,Chlamydia ,business.industry ,Public Health, Environmental and Occupational Health ,virus diseases ,Chlamydia Infections ,medicine.disease ,Infectious Diseases ,Cross-Sectional Studies ,Vietnam ,business ,Demography - Abstract
BACKGROUND: The prevalence of HIV and sexually transmitted infections among men who have sex with men (MSM) has increased substantially in Vietnam. This study aimed to estimate the prevalence of HIV syphilis urethral gonorrhoea and urethral chlamydia and determined correlates of HIV infection among MSM in An Giang Vietnam. METHODS: A group of 381 MSM were recruited in a community-based cross-sectional survey between August and December 2009. Face-to-face interviews were conducted for collecting data on sociodemographics behaviors and access to HIV prevention programs. Serological tests for HIV and syphilis and polymerase chain reaction for gonorrhoea/chlamydia were performed. Multivariate regression analyses were used to investigate the correlates of HIV infection. RESULTS: The prevalence of HIV syphilis gonorrhoea chlamydia and gonorrhoea/chlamydia were 6.3% 1.3% 1.8% 3.2% and 4.7% respectively. HIV prevalence among 63 injecting MSM was significantly higher than that of 318 noninjectors (20.6% vs. 3.5% P < 0.001). Approximately 40.4% identified as heterosexual and 42.8% had ever had sex with females. The rate of unprotected anal intercourse with another male in the last month was substantially high (75.3%). Injecting drugs (adjusted prevalence ratio [aPR] = 2.88 95% confidence interval [CI]: 1.12-7.42) being transgender (aPR = 4.27 95% CI 1.17-15.57) and unprotected sex with a female sex worker (aPR = 4.88 95% CI: 1.91-12.50) were significantly associated with HIV infection. The infection risk increased with age to a peak of 25 years and then decreased. CONCLUSIONS: Although prevalence levels are lower in An Giang Vietnam than in some other comparable locations HIV/sexually transmitted infections prevention and sexual health promotion targeting MSM are highly important in this location.
- Published
- 2012
19. Sexually transmitted infections and risk factors for gonorrhea and chlamydia in female sex workers in Soc Trang, Vietnam
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Anh Phuong Nguyen, Thuong Vu Nguyen, Truc Thanh Thi Le, Nghia Van Khuu, Roger Detels, Dung Chi Tham, and Van Cao
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Microbiology (medical) ,Sexually transmitted disease ,Adult ,medicine.medical_specialty ,Adolescent ,Gonorrhea ,Cervicitis ,Chlamydia trachomatis ,Dermatology ,Rapid plasma reagin ,Article ,law.invention ,Interviews as Topic ,Young Adult ,Condom ,law ,Risk Factors ,medicine ,Prevalence ,Humans ,Syphilis ,Treponema pallidum ,Gynecology ,Chlamydia ,Trichomoniasis ,medicine.diagnostic_test ,business.industry ,Obstetrics ,Public Health, Environmental and Occupational Health ,Candidiasis ,Chlamydia Infections ,medicine.disease ,Sex Work ,Neisseria gonorrhoeae ,Infectious Diseases ,Cross-Sectional Studies ,Vietnam ,Female ,business ,Trichomonas Vaginitis - Abstract
The goal of this study was to determine the prevalence of selected STIs and correlates of chlamydia (CT) and gonorrhea (GC) infection among (FSWs) in Soc Trang province Vietnam. Four hundred and six FSWs in Soc Trang province participated in a cross-sectional study between May and August 2003. The study subjects were interviewed to obtain information about socio-demographic and behavioral characteristics and gynecologic and STI history using a standardized interview. They underwent a physical examination during which cervical swabs were collected for GC and CT testing by polymerase chain reaction (PCR). Vaginal wet mount microscopy was performed to detect candidiasis and trichomoniasis (TV) and blood was drawn for testing for syphilis using rapid plasma reagin (RPR)+ Treponema pallidum hemagglutination assay (TPHA). Univariate and multivariate analyses were used to assess the associations of GC CT and GC/CT with selected variables. Prevalences were 14.9% for GC 48.4% for CT 54.9% for GC/CT 3.8% for syphilis 8.9% for trichomoniasis and 12.2% for candidiasis. Increased risk for CT was associated with sex work for more than 6 months (aOR = 2.40 95% CI: 0.99-5.82) receiving $4 US or less per sexual transaction (aOR = 1.91 95% CI 1.13-3.23) and ever having terminated a pregnancy (aOR = 1.68 95% CI 1.00-2.82). Reduced likelihood of CT was associated with older age (aOR = 0.96 95% CI: 0.93-1.00) and ever having douched in the past month (aOR = 0.60 95% CI 0.36-1.00). Only ever douching in the past month was associated with decreased risk for GC (aOR = 0.47 95% CI 0.25-0.87). Higher likelihood of GC/CT was associated with having more than 4 clients per month (OR = 2.35 95% CI 1.02-5.41) and receiving $4 US or less per sexual transaction (aOR = 1.74 95% CI 1.04-2.93). The prevalence of GC/CT is high amongst FSWs in Soc Trang. Therefore periodic presumptive treatment (PPT) for cervicitis together with World Health Organization-recommended periodic syndromic sexually transmitted disease management for FSWs and further interventions should be considered and a 100% condom use program should be promptly implemented. The existing STI health education program for FSWs should be strengthened with special consideration of the correlates observed in this study.
- Published
- 2008
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