40 results on '"Tamekloe A"'
Search Results
2. Applications of molecular docking in natural products-based drug discovery
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Asiamah, Isaac, Obiri, Samuel Asiamah, Tamekloe, Woasiedem, Armah, Francis Ackah, and Borquaye, Lawrence Sheringham
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- 2023
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3. Applications of molecular docking in natural products-based drug discovery
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Isaac Asiamah, Samuel Asiamah Obiri, Woasiedem Tamekloe, Francis Ackah Armah, and Lawrence Sheringham Borquaye
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Natural products ,Drug discovery and development ,Molecular docking ,Phytochemicals ,Ligands ,Protein target ,Science - Abstract
Natural products have a long history of use in the treatment of various diseases particularly in developing countries. The use of compounds of natural origin as lead compounds for the development of conventional drugs is widely recognised. Natural product-based drug discovery efforts in developing countries mostly involve the use of crude extracts in in-vitro and/or in-vivo assays. There are limited efforts at isolating active principles for structure elucidation studies. Studies that isolate pure secondary metabolites and characterize their structures have limited bioactivity evaluations. In conventional drug discovery programs, molecular docking serves as a useful tool for predicting interactions of small molecules with drug target(s) to guide synthesis decisions. Medicinal chemists use this tool to predict and synthesize compounds likely to have pharmacological activity and thus save time and cost for drug discovery. Efforts have been made to incorporate molecular docking techniques into natural products-based drug discovery. The objective of this review is to discuss molecular docking in natural product drug discovery programs with the goal of providing easy-to-understand information to help beginners interested in incorporating molecular docking in their research. This is expected to enhance natural product screening programs by predicting which phytochemicals are likely to show success, especially in new disease situations such as COVID-19. Applications in the repositioning of plants for emerging conditions are also discussed.
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- 2023
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4. An approach to integrate population mobility patterns and sociocultural factors in communicable disease preparedness and response
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Rebecca D. Merrill, Ali Imorou Bah Chabi, Elvira McIntyre, Jules Venance Kouassi, Martial Monney Alleby, Corrine Codja, Ouyi Tante, Godjedo Togbemabou Primous Martial, Idriss Kone, Sarah Ward, Tamekloe Tsidi Agbeko, and Clement Glèlè Kakaı
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History of scholarship and learning. The humanities ,AZ20-999 ,Social Sciences - Abstract
Abstract Complex human movement patterns driven by a range of economic, health, social, and environmental factors influence communicable disease spread. Further, cross-border movement impacts disparate public health systems of neighboring countries, making an effective response to disease importation or exportation more challenging. Despite the array of quantitative techniques and social science approaches available to analyze movement patterns, there continues to be a dearth of methods within the applied public health setting to gather and use information about community-level mobility dynamics. Population Connectivity Across Borders (PopCAB) is a rapidly-deployable toolkit to characterize multisectoral movement patterns through community engagement using focus group discussions or key informant interviews, each with participatory mapping, and apply the results to tailor preparedness and response strategies. The Togo and Benin Ministries of Health (MOH), in collaboration with the Abidjan Lagos Corridor Organization and the US Centers for Disease Control and Prevention, adapted and applied PopCAB to inform cross-border preparedness and response strategies for multinational Lassa fever outbreaks. Initially, the team implemented binational, national-level PopCAB activities in March 2017, highlighting details about a circular migration pathway across northern Togo, Benin, and Nigeria. After applying those results to respond to a cross-border Lassa fever outbreak in February 2018, the team designed an expanded PopCAB initiative in April 2018. In eight days, they trained 54 MOH staff who implemented 21 PopCAB focus group discussions in 14 cities with 224 community-level participants representing six stakeholder groups. Using the newly-identified 167 points of interest and 176 routes associated with a circular migration pathway across Togo, Benin, and Nigeria, the Togo and Benin MOH refined their cross-border information sharing and collaboration processes for Lassa fever and other communicable diseases, selected health facilities with increased community connectivity for enhanced training, and identified techniques to better integrate traditional healers in surveillance and community education strategies. They also integrated the final toolkit in national- and district-level public health preparedness plans. Integrating PopCAB in public health practice to better understand and accommodate population movement patterns can help countries mitigate the international spread of disease in support of improved global health security and International Health Regulations requirements.
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- 2021
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- View/download PDF
5. An approach to integrate population mobility patterns and sociocultural factors in communicable disease preparedness and response
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Merrill, Rebecca D., Chabi, Ali Imorou Bah, McIntyre, Elvira, Kouassi, Jules Venance, Alleby, Martial Monney, Codja, Corrine, Tante, Ouyi, Martial, Godjedo Togbemabou Primous, Kone, Idriss, Ward, Sarah, Agbeko, Tamekloe Tsidi, and Kakaı, Clement Glèlè
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- 2021
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6. Gastrointestinal parasites in Papio anubis (Olive baboons) of Yankari game reserve: Zoonotic concerns.
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Tamekloe, S. E., Pam, G., Turshak, L., Ukizintambara, T., and Okpanachi, M. I.
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BABOONS ,PARASITES ,ENTAMOEBA histolytica ,HELMINTHS ,ANIMAL populations ,ZOONOSES ,OLIVE ,INTESTINAL parasites - Abstract
The emergence and reemergence of zoonotic diseases from wildlife is a growing concern. In line with the One Health concept, which recognizes the interconnectedness of human, animal, and environmental health, it is essential to consider all these factors to achieve optimal health outcomes globally. This study investigated the prevalence of gastrointestinal parasites in Papio anubis (olive baboon) troops living in close proximity to humans. The Yankari Game Reserve, a wildlife park in Bauchi State, Nigeria, has diverse wildlife populations, including P. anubis. One hundred and fifty-one faecal samples from P. anubis were collected and examined using formalin ethyl acetate sedimentation and centrifugal flotation techniques, revealing the presence of ten (10) species of intestinal parasites, accounting for an overall parasite prevalence of 145 (96.03 %) in the observed population. The most prevalent parasite species among the P. anubis population was Entamoeba histolytica, with a prevalence of 106 (70.2%), followed by Entamoeba coli with a prevalence of 97 (64.2%). Anclyostoma spp. was the most common helminth species, with a prevalence of 73 (48.3%), followed by Strongyloides stercoralis with a prevalence of 58 (38.4%). The high prevalence of potentially pathogenic parasites, such as Anclyostoma spp. and E. histolytica, among the P. anubis population is of public health importance and underscores the need for further research to examine humans in close proximity with these animals for the presence of gastrointestinal parasites and compare for species similarities. The findings of this research may help to determine the likelihood of cross-species transmission which is critical to safeguarding both humans and animals as they share the same environment. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Natural immunity against capsular group X N. meningitidis following an outbreak in Togo, 2007
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Norheim, Gunnstein, Mueller, Judith E., Njanpop-Lafourcade, Berthe-Marie, Delrieu, Isabelle, Findlow, Helen, Borrow, Ray, Xie, Ouli, Nagaputra, Jerry, Ramasamy, Roshan, Dold, Christina, Tamekloe, Tsidi Agbeko, Rollier, Christine S., Watt, Hilary, Kere, Abiba Banla, Næss, Lisbeth M., and Pollard, Andrew J.
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- 2018
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8. Prevalence of SARS-CoV-2 among high-risk populations in Lomé (Togo) in 2020.
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Wemboo Afiwa Halatoko, Yao Rodion Konu, Fifonsi Adjidossi Gbeasor-Komlanvi, Arnold Junior Sadio, Martin Kouame Tchankoni, Koffi Segbeaya Komlanvi, Mounerou Salou, Ameyo Monique Dorkenoo, Issaka Maman, Amétépé Agbobli, Majesté Ihou Wateba, Komi Séraphin Adjoh, Edem Goeh-Akue, Yem-Bla Kao, Innocent Kpeto, Paul Pana, Rebecca Kinde-Sossou, Agbeko Tamekloe, Josée Nayo-Apétsianyi, Simon-Pierre Hamadi Assane, Mireille Prine-David, Sossinou Marcel Awoussi, Mohaman Djibril, Moustafa Mijiyawa, Anoumou Claver Dagnra, and Didier Koumavi Ekouevi
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Medicine ,Science - Abstract
BackgroundIn December 2019, the COVID-19 outbreak began in China and quickly spread throughout the world and was reclassified as a pandemic in March 2020. The first case of COVID-19 was declared in Togo on March 5. Two months later, few data were available to describe the circulation of the new coronavirus in the country.ObjectiveThis survey aimed to estimate the prevalence of SARS-CoV-2 in high-risk populations in Lomé.Materials and methodsFrom April 23, 2020, to May 8, 2020, we recruited a sample of participants from five sectors: health care, air transport, police, road transport and informal. We collected oropharyngeal swabs for direct detection through real-time reverse transcription polymerase chain reaction (rRT-PCR) and blood for antibody detection by serological tests. The overall prevalence (current and past) of infection was defined by positivity for both tests.ResultsA total of 955 participants with a median age of 36 (IQR 32-43) were included, and 71.6% (n = 684) were men. Approximately 22.1% (n = 212) were from the air transport sector, 20.5% (n = 196) were from the police sector, and 38.7% (n = 370) were from the health sector. Seven participants (0.7%, 95% CI: 0.3-1.6%) had a positive rRT-PCR test result at the time of recruitment, and nine (0.9%, 95% CI: 0.4-1.8%) were seropositive for IgM or IgG against SARS-CoV-2. We found an overall prevalence of 1.6% (n = 15), 95% CI: 0.9-2.6%.ConclusionThe prevalence of SARS-CoV-2 infection among high-risk populations in Lomé was relatively low and could be explained by the various measures taken by the Togolese government. Therefore, we recommend targeted screening.
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- 2020
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9. Case study of Argus in Togo: An SMS and web-based application to support public health surveillance, results from 2016 to 2019.
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José Guerra, Kokou Mawule Davi, Florentina Chipuila Rafael, Hamadi Assane, Lucile Imboua, Fatoumata Binta Tidiane Diallo, Tsidi Agbeko Tamekloe, Aklagba Kuawo Kuassi, Farihétou Ouro-Kavalah, Ganiou Tchaniley, Nassirou Ouro-Nile, and Pierre Nabeth
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Medicine ,Science - Abstract
IntroductionArgus is an open source electronic solution to facilitate the reporting and management of public health surveillance data. Its components include an Android-phone application, used by healthcare facilities to report results via SMS; and a central server located at the Ministry of Health, displaying aggregated results on a web platform for intermediate and central levels. This study describes the results of the use of Argus in two regions of Togo.MethodsArgus was used in 148 healthcare facilities from May 2016 to July 2018, expanding to 185 healthcare facilities from July 2018. Data from week 21 of 2016 to week 12 of 2019 was extracted from the Argus database and analysed. An assessment mission took place in August 2016 to collect users' satisfaction, to estimate the concordance of the received data with the collected data, and to estimate the time required to report data with Argus.ResultsOverall completeness of data reporting was 76%, with 80% of reports from a given week being received before Tuesday 9PM. Concordance of data received from Argus and standard paper forms was 99.7%. Median time needed to send a report using Argus was 4 minutes. Overall completeness of data review at district, regional, and central levels were 89%, 68%, and 35% respectively. Implementation cost of Argus was 23 760 USD for 148 facilities.ConclusionsThe use of Argus in Togo enabled healthcare facilities to send weekly reports and alerts through SMS in a user-friendly, reliable and timely manner. Reengagement of surveillance officers at all levels, especially at the central level, enabled a dramatic increase in completeness and timeliness of data report and data review.
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- 2020
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10. Evaluation of chest radiography, lytA real-time PCR, and other routine tests for diagnosis of community-acquired pneumonia and estimation of possible attributable fraction of pneumococcus in northern Togo
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BLAKE, A., NJANPOP-LAFOURCADE, B. M., TELLES, J. N., RAJOHARISON, A., MAKAWA, M. S., AGBENOKO, K., TAMEKLOE, S., MUELLER, J. E., TALL, H., GESSNER, B. D., PARANHOS-BACCALÀ, G., and MOÏSI, J. C.
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- 2017
11. Responding to Communicable Diseases in Internationally Mobile Populations at Points of Entry and along Porous Borders, Nigeria, Benin, and Togo
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Rebecca D. Merrill, Kimberly Rogers, Sarah Ward, Olubumni Ojo, Clement Glele Kakaī, Tamekloe Tsidi Agbeko, Hassan Garba, Amanda MacGurn, Marydale Oppert, Idrissa Kone, Olutola Bamsa, Dana Schneider, and Clive Brown
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border crossing ,global health ,global health security ,public health surveillance ,Nigeria ,Benin ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
Recent multinational disease outbreaks demonstrate the risk of disease spreading globally before public health systems can respond to an event. To ensure global health security, countries need robust multisectoral systems to rapidly detect and respond to domestic or imported communicable diseases. The US Centers for Disease Control and Prevention International Border Team works with the governments of Nigeria, Togo, and Benin, along with Pro-Health International and the Abidjan-Lagos Corridor Organization, to build sustainable International Health Regulations capacities at points of entry (POEs) and along border regions. Together, we strengthen comprehensive national and regional border health systems by developing public health emergency response plans for POEs, conducting qualitative assessments of public health preparedness and response capacities at ground crossings, integrating internationally mobile populations into national health surveillance systems, and formalizing cross-border public health coordination. Achieving comprehensive national and regional border health capacity, which advances overall global health security, necessitates multisectoral dedication to the aforementioned components.
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- 2017
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12. Identification of Streptococcus suis Meningitis through Population-Based Surveillance, Togo, 2010–2014
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Haoua Tall, Berthe-Marie Njanpop-Lafourcade, Didier Mounkoro, Loukoumane Tidjani, Kodjo Agbenoko, Issifou Alassani, Moussa Amidou, Stanislas Tamekloe, Kenneth G. Laing, Adam A. Witney, Jason Hinds, Mark P.G. van der Linden, Bradford D. Gessner, and Jennifer C. Moïsi
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meningitis ,zoonoses ,Streptococcus suis ,occupational health ,Africa ,Togo ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
During 2010–2014, we enrolled 511 patients with suspected bacterial meningitis into surveillance in 2 districts of northern Togo. We identified 15 persons with Streptococcus suis infection; 10 had occupational contact with pigs, and 12 suffered neurologic sequelae. S. suis testing should be considered in rural areas of the African meningitis belt.
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- 2016
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13. Burden of Pneumococcal Disease in Northern Togo before the Introduction of Pneumococcal Conjugate Vaccine.
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Jennifer C Moïsi, Makawa-Sy Makawa, Haoua Tall, Kodjo Agbenoko, Berthe-Marie Njanpop-Lafourcade, Stanislas Tamekloe, Moussa Amidou, Judith E Mueller, and Bradford D Gessner
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Medicine ,Science - Abstract
S. pneumoniae is a leading cause of meningitis morbidity and mortality in the African meningitis belt, but little is known of its contribution to the burden of pneumonia in the region. We aimed to estimate the incidence of pneumococcal disease in children and adults in northern Togo, before the introduction of pneumococcal conjugate vaccine (PCV).From May 1st 2010 to April 30th 2013, we systematically enrolled all hospitalized patients meeting a case definition of suspected meningitis or clinical pneumonia, residing in Tone or Cinkasse districts, northern Togo and providing informed consent. We collected clinical data and tested biological specimens according to standardized procedures, including bacteriology and PCR testing of cerebro-spinal fluid for meningitis patients and blood cultures and whole blood lytA PCR for pneumonia patients. Chest X-rays (CXR) were interpreted using the WHO methodology. We included 404 patients with meningitis (104
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- 2017
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14. Emergence of Lassa Fever Disease in Northern Togo: Report of Two Cases in Oti District in 2016
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Akouda Akessiwe Patassi, Dadja Essoya Landoh, Agballa Mebiny-Essoh Tchalla, Wemboo Afiwa Halatoko, Hamadi Assane, Bayaki Saka, Mouchedou Abdoukarim Naba, Issifou Yaya, Kossi Atsissinta Edou, Tsidi Agbeko Tamekloe, Abiba Kere Banla, Kokou Mawule Davi, Magloire Manga, Yao Kassankogno, and Dominique Salmon-Ceron
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Infectious and parasitic diseases ,RC109-216 - Abstract
Background. Lassa fever belongs to the group of potentially fatal hemorrhagic fevers, never reported in Togo. The aim of this paper is to report the first two cases of Lassa fever infection in Togo. Case Presentation. The two first Lassa fever cases occurred in two expatriate’s health professionals working in Togo for more than two years. The symptoms appeared among two health professionals of a clinic located in Oti district in the north of the country. The absence of clinical improvement after antimalarial treatment and the worsening of clinical symptoms led to the medical evacuation. The delayed diagnosis of the first case led to a fatal outcome. The second case recovered under ribavirin treatment. Conclusion. The emergence of this hemorrhagic fever confirms the existence of Lassa fever virus in Togo. After a period of intensive Ebola virus transmission from 2013 to 2015, this is an additional call for the establishment and enhancement of infection prevention and control measures in the health care setting in West Africa.
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- 2017
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15. An approach to integrate population mobility patterns and sociocultural factors in communicable disease preparedness and response
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Idriss Kone, Sarah Ward, Corrine Codja, Rebecca D. Merrill, Tamekloe Tsidi Agbeko, Ouyi Tante, Godjedo Togbemabou Primous Martial, Jules Venance Kouassi, Elvira McIntyre, Clement Glèlè Kakaı, Martial Monney Alleby, and Ali Imorou Bah Chabi
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0301 basic medicine ,Economic growth ,Geographic mobility ,medicine.medical_specialty ,Population ,International Health Regulations ,lcsh:Social Sciences ,03 medical and health sciences ,0302 clinical medicine ,parasitic diseases ,lcsh:AZ20-999 ,medicine ,Global health ,030212 general & internal medicine ,education ,General Psychology ,education.field_of_study ,Communicable disease ,Community engagement ,General Arts and Humanities ,Public health ,General Social Sciences ,General Business, Management and Accounting ,lcsh:History of scholarship and learning. The humanities ,lcsh:H ,030104 developmental biology ,Geography ,Preparedness ,General Economics, Econometrics and Finance - Abstract
Complex human movement patterns driven by a range of economic, health, social, and environmental factors influence communicable disease spread. Further, cross-border movement impacts disparate public health systems of neighboring countries, making an effective response to disease importation or exportation more challenging. Despite the array of quantitative techniques and social science approaches available to analyze movement patterns, there continues to be a dearth of methods within the applied public health setting to gather and use information about community-level mobility dynamics. Population Connectivity Across Borders (PopCAB) is a rapidly-deployable toolkit to characterize multisectoral movement patterns through community engagement using focus group discussions or key informant interviews, each with participatory mapping, and apply the results to tailor preparedness and response strategies. The Togo and Benin Ministries of Health (MOH), in collaboration with the Abidjan Lagos Corridor Organization and the US Centers for Disease Control and Prevention, adapted and applied PopCAB to inform cross-border preparedness and response strategies for multinational Lassa fever outbreaks. Initially, the team implemented binational, national-level PopCAB activities in March 2017, highlighting details about a circular migration pathway across northern Togo, Benin, and Nigeria. After applying those results to respond to a cross-border Lassa fever outbreak in February 2018, the team designed an expanded PopCAB initiative in April 2018. In eight days, they trained 54 MOH staff who implemented 21 PopCAB focus group discussions in 14 cities with 224 community-level participants representing six stakeholder groups. Using the newly-identified 167 points of interest and 176 routes associated with a circular migration pathway across Togo, Benin, and Nigeria, the Togo and Benin MOH refined their cross-border information sharing and collaboration processes for Lassa fever and other communicable diseases, selected health facilities with increased community connectivity for enhanced training, and identified techniques to better integrate traditional healers in surveillance and community education strategies. They also integrated the final toolkit in national- and district-level public health preparedness plans. Integrating PopCAB in public health practice to better understand and accommodate population movement patterns can help countries mitigate the international spread of disease in support of improved global health security and International Health Regulations requirements.
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- 2021
16. National Surveillance Data on the Epidemiology of Cholera in Togo
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Essoya, Landoh Dadja, Gessner, Bradford D., Kossi, Badziklou, Tsidi, Tamekloe, Ibrahim, Nassoury Dalandi, Anoumou, Dagnra, Akouda, Patassi, Tante, Ouyi, Bidjada, Bawoumodom, Tigossou, Segla, and Abiba, Banla Kere
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- 2013
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17. Identification of Streptococcus suis meningitis through population-based surveillance, Togo, 2010-2014
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Tall, Haoua, Njanpop-Lafourcade, Berthe-Marie, Mounkoro, Didier, Tidjani, Loukoumane, Agbenoko, Kodjo, Alassani, Issifou, Amidou, Moussa, Tamekloe, Stanislas, Laing, Kenneth G., Witney, Adam A., Hinds, Jason, van der Linden, Mark P.G., Gessner, Bradford D., and Moisi, Jennifer C.
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Streptococcal infections -- Diagnosis ,Meningitis -- Diagnosis ,Sentinel surveillance -- Methods ,Health - Abstract
Streptococcus suis, an encapsulated, gram-positive bacterium, commonly colonizes the respiratory, genital, and intestinal tracts of pigs and may cause severe disease, including meningitis, sepsis, and bronchopneumonia (1). Zoonotic cases of [...]
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- 2016
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18. Neisseria meningitidis Serogroup W Meningitis Epidemic in Togo, 2016
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Haoua Tall, Agoro Sibabe, Catherine H Bozio, Agbenoko Kodjo, Christelle Nikiema, Berthe-Marie Njanpop-Lafourcade, Essofa O Abodji, Didier Mounkoro, Jennifer C. Moïsi, Issaka Maman, Téné Alima Essoh, Souleymane Sakande, Détèma W Maba, Dadja Essoya Landoh, Bradford D. Gessner, Tsidi Agbeko Tamekloe, and Adodo Yao Sadji
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0301 basic medicine ,030231 tropical medicine ,Population ,Attack rate ,Supplement Articles ,Meningococcal Vaccines ,Neisseria meningitidis ,Meningitis, Meningococcal ,Meningococcal disease ,medicine.disease_cause ,Serogroup ,History, 21st Century ,Mass Vaccination ,epidemic ,Disease Outbreaks ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Immunology and Allergy ,Humans ,education ,education.field_of_study ,Geography ,business.industry ,Incidence ,Outbreak ,medicine.disease ,vaccination ,Virology ,Vaccination ,030104 developmental biology ,Infectious Diseases ,Togo ,Population Surveillance ,African meningitis belt ,business ,Meningitis - Abstract
BackgroundDuring 2014, 4 regions in Togo within the African meningitis belt implemented vaccination campaigns with meningococcal serogroup A conjugate vaccine (MACV). From January to July 2016, Togo experienced its first major Neisseria meningitidis serogroup W (NmW) outbreak. We describe the epidemiology, response, and management of the outbreak.MethodsSuspected, probable, and confirmed cases were identified using World Health Organization case definitions. Through case-based surveillance, epidemiologic and laboratory data were collected for each case. Cerebrospinal fluid specimens were analyzed by polymerase chain reaction, culture, or latex agglutination. Vaccination campaigns were conducted in affected districts.ResultsFrom January 11 to July 5, 2016, 1995 suspected meningitis cases were reported, with 128 deaths. Among them, 479 (24.0%) were confirmed by laboratory testing, and 94 (4.7%) and 1422 (71.3%) remained as probable and suspected cases, respectively. Seven epidemic districts had cumulative attack rates greater than 100 per 100 000 population. Of the confirmed cases, 91.5% were NmW; 39 of 40 available NmW isolates were sequence type-11/clonal complex-11.ConclusionsThis outbreak demonstrates that, although high coverage with MACV has reduced serogroup A outbreaks, large meningococcal meningitis outbreaks due to other serogroups may continue to occur; effective multivalent meningococcal conjugate vaccines could improve meningococcal disease prevention within meningitis belt populations.
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- 2019
19. Screening for extended-spectrum beta-lactamase-producing Enterobacteriaceae intestinal carriage among children aged under five in Lomé, Togo
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Nikiema Pessinaba, C., Landoh, D.E., Dossim, S., Bidjada, B., Kere-Banla, A., Tamekloe, T.A., Doumbia, T., Douti, K., Bakonde, B.V., and Segbena, A.Y.
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- 2018
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20. Natural immunity against capsular group X N. meningitidis following an outbreak in Togo, 2007
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Andrew J. Pollard, Tsidi Agbeko Tamekloe, Gunnstein Norheim, Berthe-Marie Njanpop-Lafourcade, Roshan Ramasamy, Ray Borrow, Jerry C. Nagaputra, Lisbeth Meyer Næss, Christine S. Rollier, Hilary Watt, Helen Findlow, Judith E. Mueller, Ouli Xie, Abiba Banla Kere, Christina Dold, Isabelle Delrieu, Norwegian Institute of Public Health [Oslo] (NIPH), Oxford Vaccine Group, University of Oxford [Oxford]-Oxford NIHR Biomedical Research Centre-The Churchill hospital, École des Hautes Études en Santé Publique [EHESP] (EHESP), Département Méthodes quantitatives en santé publique (METIS), Epidémiologie des Maladies Emergentes - Emerging Diseases Epidemiology, Pasteur-Cnam Risques infectieux et émergents (PACRI), Institut Pasteur [Paris]-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Institut Pasteur [Paris]-Conservatoire National des Arts et Métiers [CNAM] (CNAM), Agence de Médecine Préventive, Public Health England [London], Ministry of Health [Togo], Imperial College London, Institut National d’Hygiene [Togo], This work was funded by a research grant from the Meningitis Research Foundation, U.K. (Grant number 0906.1) and supported by the Oxford Partnership Comprehensive Biomedical Research Centre with funding from the NIHR Biomedical Research Centre Programme., University of Oxford-Oxford NIHR Biomedical Research Centre-The Churchill hospital, Institut Pasteur [Paris] (IP), Institut Pasteur [Paris] (IP)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Institut Pasteur [Paris] (IP)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)
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Male ,[SDV]Life Sciences [q-bio] ,Physiology ,Neisseria meningitidis ,medicine.disease_cause ,MESH: Meningococcal Vaccines ,Disease Outbreaks ,0302 clinical medicine ,Seroepidemiologic Studies ,MESH: Child ,MESH: Antibodies, Bacterial ,030212 general & internal medicine ,MESH: Disease Outbreaks ,Child ,Polysaccharide ,MESH: Immunoglobulin G ,Meningococcal ,biology ,MESH: Meningitis, Meningococcal ,Age Factors ,11 Medical And Health Sciences ,Antibodies, Bacterial ,3. Good health ,Titer ,Infectious Diseases ,MESH: Young Adult ,Child, Preschool ,Population Surveillance ,Togo ,Molecular Medicine ,MESH: Immunity, Innate ,Female ,Antibody ,Adult ,Adolescent ,030231 tropical medicine ,Meningococcal Vaccines ,Meningitis, Meningococcal ,MESH: Neisseria meningitidis ,Antibodies ,MESH: Population Surveillance ,Capsular group X ,Young Adult ,03 medical and health sciences ,Immune system ,Antigen ,Conjugate vaccine ,Virology ,medicine ,Humans ,MESH: Adolescent ,MESH: Age Factors ,Antigens, Bacterial ,MESH: Humans ,MESH: Seroepidemiologic Studies ,Innate immune system ,General Veterinary ,General Immunology and Microbiology ,business.industry ,MESH: Child, Preschool ,Public Health, Environmental and Occupational Health ,Outbreak ,MESH: Adult ,06 Biological Sciences ,MESH: Male ,Immunity, Innate ,MESH: Togo ,Immunoglobulin G ,biology.protein ,Bactericidal ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,07 Agricultural And Veterinary Sciences ,business ,MESH: Female ,MESH: Antigens, Bacterial - Abstract
Background Capsular group X N. meningitidis (MenX) has emerged as a cause of localized disease outbreaks in sub-Saharan Africa, but the human immune response following exposure to MenX antigens is poorly described. We therefore assessed the natural immunity against MenX in individuals who were living in an area affected by a MenX outbreak during 2007 in Togo, West Africa. During 2009, 300 healthy individuals (100 aged 3–5 years, 100 aged 13–19 years and 100 aged 20–25 years) were included in the study, and serum responses were compared with sera from age-matched controls from the U.K. and Burkina Faso. Methods MenX serum bactericidal antibody (SBA) was measured using rabbit complement, and antibodies against MenX polysaccharide (XPS) and outer membrane vesicles (XOMVs) were quantified by ELISA. Results The proportion of Togolese individuals with an SBA titer of ≥8 against the MenX strain was 29% (95% confidence interval (CI) 18–41) among those aged 3–5 years, 34% (95% CI 9–60) among those aged 13–19 years and 32% (95% CI 24–40) among those aged 20–25 years. These were significantly higher than observed in the control populations from the U.K (range 13–16%) and Burkina Faso (range 2–6%). Conclusion In Togolese individuals, the concentration of serum IgG against XPS was higher among the two older age groups as compared to the youngest age group. Antibody concentrations against MenX PS correlated significantly with SBA titers. This supports further development of a MenX PS based conjugate vaccine. Further studies are needed to verify the ability of MenX PS to induce SBA in humans.
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- 2018
21. Responding to Communicable Diseases in Internationally Mobile Populations at Points of Entry and along Porous Borders, Nigeria, Benin, and Togo
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Olutola Bamsa, Amanda MacGurn, Hassan Garba, Sarah Ward, Marydale Cauble Oppert, Tamekloe Tsidi Agbeko, Clement Glele Kakaī, Idrissa Kone, Clive Brown, Rebecca D. Merrill, Dana Schneider, Olubumni Ojo, and Kimberly B Rogers
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Microbiology (medical) ,Economic growth ,medicine.medical_specialty ,Epidemiology ,International Cooperation ,global health ,Nigeria ,lcsh:Medicine ,Disease ,01 natural sciences ,Communicable Diseases ,International Health Regulations ,Disease Outbreaks ,border crossing ,lcsh:Infectious and parasitic diseases ,03 medical and health sciences ,0302 clinical medicine ,Public health surveillance ,Environmental protection ,medicine ,Global health ,Humans ,Benin ,lcsh:RC109-216 ,030212 general & internal medicine ,0101 mathematics ,global health security ,National health ,Public health ,Research ,010102 general mathematics ,lcsh:R ,Emigration and Immigration ,public health surveillance ,Infectious Diseases ,Emergency response ,Multinational corporation ,Togo ,Population Surveillance ,Communicable Disease Control ,Responding to Communicable Diseases in Internationally Mobile Populations at Points of Entry and along Porous Borders, Nigeria, Benin, and Togo ,Business - Abstract
Recent multinational disease outbreaks demonstrate the risk of disease spreading globally before public health systems can respond to an event. To ensure global health security, countries need robust multisectoral systems to rapidly detect and respond to domestic or imported communicable diseases. The US Centers for Disease Control and Prevention International Border Team works with the governments of Nigeria, Togo, and Benin, along with Pro-Health International and the Abidjan-Lagos Corridor Organization, to build sustainable International Health Regulations capacities at points of entry (POEs) and along border regions. Together, we strengthen comprehensive national and regional border health systems by developing public health emergency response plans for POEs, conducting qualitative assessments of public health preparedness and response capacities at ground crossings, integrating internationally mobile populations into national health surveillance systems, and formalizing cross-border public health coordination. Achieving comprehensive national and regional border health capacity, which advances overall global health security, necessitates multisectoral dedication to the aforementioned components.
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- 2017
22. Case study of Argus in Togo: An SMS and web-based application to support public health surveillance, results from 2016 to 2019.
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Guerra, José, Davi, Kokou Mawule, Rafael, Florentina Chipuila, Assane, Hamadi, Imboua, Lucile, Diallo, Fatoumata Binta Tidiane, Tamekloe, Tsidi Agbeko, Kuassi, Aklagba Kuawo, Ouro-kavalah, Farihétou, Tchaniley, Ganiou, Ouro-Nile, Nassirou, and Nabeth, Pierre
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WEB-based user interfaces ,PUBLIC support ,HEALTH facilities ,PUBLIC health surveillance ,WARNING labels ,BLACKBERRY (Smartphone) - Abstract
Introduction: Argus is an open source electronic solution to facilitate the reporting and management of public health surveillance data. Its components include an Android-phone application, used by healthcare facilities to report results via SMS; and a central server located at the Ministry of Health, displaying aggregated results on a web platform for intermediate and central levels. This study describes the results of the use of Argus in two regions of Togo. Methods: Argus was used in 148 healthcare facilities from May 2016 to July 2018, expanding to 185 healthcare facilities from July 2018. Data from week 21 of 2016 to week 12 of 2019 was extracted from the Argus database and analysed. An assessment mission took place in August 2016 to collect users' satisfaction, to estimate the concordance of the received data with the collected data, and to estimate the time required to report data with Argus. Results: Overall completeness of data reporting was 76%, with 80% of reports from a given week being received before Tuesday 9PM. Concordance of data received from Argus and standard paper forms was 99.7%. Median time needed to send a report using Argus was 4 minutes. Overall completeness of data review at district, regional, and central levels were 89%, 68%, and 35% respectively. Implementation cost of Argus was 23 760 USD for 148 facilities. Conclusions: The use of Argus in Togo enabled healthcare facilities to send weekly reports and alerts through SMS in a user-friendly, reliable and timely manner. Reengagement of surveillance officers at all levels, especially at the central level, enabled a dramatic increase in completeness and timeliness of data report and data review. [ABSTRACT FROM AUTHOR]
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- 2020
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23. Identification of Streptococcus suis Meningitis through Population-Based Surveillance, Togo, 2010–2014
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Adam A. Witney, Moussa Amidou, Berthe-Marie Njanpop-Lafourcade, Bradford D. Gessner, Mark van der Linden, Haoua Tall, Issifou Alassani, Didier Mounkoro, Stanislas Tamekloe, Jason Hinds, Kodjo Agbenoko, Loukoumane Tidjani, Jennifer C. Moïsi, and Ken Laing
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0301 basic medicine ,Male ,Pediatrics ,Streptococcus suis ,Epidemiology ,lcsh:Medicine ,meningitis belt ,Identification of Streptococcus suis Meningitis through Population-Based Surveillance, Togo, 2010–2014 ,Drug Resistance, Multiple, Bacterial ,bacteria ,Child ,biology ,Dispatch ,meningitis ,Middle Aged ,Anti-Bacterial Agents ,Infectious Diseases ,Togo ,Child, Preschool ,Population Surveillance ,surveillance ,Bacterial meningitis ,Female ,African meningitis belt ,Meningitis ,Microbiology (medical) ,Adult ,medicine.medical_specialty ,Adolescent ,030106 microbiology ,Population based ,lcsh:Infectious and parasitic diseases ,Meningitis, Bacterial ,03 medical and health sciences ,Young Adult ,parasitic diseases ,medicine ,Humans ,lcsh:RC109-216 ,Neurologic sequelae ,business.industry ,lcsh:R ,medicine.disease ,biology.organism_classification ,Virology ,zoonoses ,occupational health ,Africa ,business - Abstract
Emerging infectious diseases 22(7), 1262-1264 (2016). doi:10.3201/eid2207.151511, Published by CDC, Atlanta, Ga.
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- 2016
24. Evaluation of chest radiography, lytA real-time PCR, and other routine tests for diagnosis of community-acquired pneumonia and estimation of possible attributable fraction of pneumococcus in northern Togo
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A, Blake, B M, Njanpop-Lafourcade, J N, Telles, A, Rajoharison, M S, Makawa, K, Agbenoko, S, Tamekloe, J E, Mueller, H, Tall, B D, Gessner, G, Paranhos-Baccalà, J C, Moïsi, École des Hautes Études en Santé Publique [EHESP] (EHESP), and Département Méthodes quantitatives en santé publique (METIS)
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Bacteriological Techniques ,Diagnostic Tests, Routine ,Chest radiography ,Pneumonia, Pneumococcal ,Real-Time Polymerase Chain Reaction ,Sensitivity and Specificity ,Original Papers ,Community-Acquired Infections ,Other Bacterial Infections ,C-Reactive Protein ,Streptococcus pneumoniae ,Togo ,Latent class analysis ,Prevalence ,Humans ,pneumonia ,Radiography, Thoracic ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Aetiology ,Ppneumonia - Abstract
International audience; Streptococcus pneumoniae (Spn) is a leading cause of community-acquired pneumonia (CAP), yet existing diagnostic tools remain inadequate. We aimed to evaluate laboratory and radiological methods for detecting pneumococcal aetiology in CAP patients and to estimate Spn prevalence in this group. All-aged patients hospitalized with clinically defined CAP in northern Togo were enrolled during 2010-2013. Latent class analysis pooled results of semi-automated blood culture (SABC), whole blood lytA real-time polymerase chain reaction (rt-PCR), serum C-reactive protein (CRP), and chest radiography (CXR) and categorized patients as likely pneumococcal or non-pneumococcal CAP. We enrolled 1684 patients; 1501 had results for all tests. CXR, SABC, lytA rt-PCR and CRP >71·2 mg/l had sensitivities of 94% [95% confidence interval (CI) 87-100], 13% (95% CI 10-16), 17% (95% CI 14-21) and 78% (95% CI 75-80), and specificities of 88% (95% CI 84-93), 100% (95% CI 99-100), 97% (95% CI 96-99) and 77% (95% CI 75-79), respectively. Pneumococcal attributable proportion was 34% (95% CI 32-37), increasing with age and in men. We estimated that Spn caused one third of CAP. Whole blood lytA rt-PCR was more sensitive than SABC; both had low sensitivity and high specificity. Conversely CXR was highly sensitive and reasonably specific; it could be a useful tool for epidemiological studies aiming to define Spn pneumonia incidence across all ages.
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- 2017
25. Emergence of Lassa Fever Disease in Northern Togo: Report of Two Cases in Oti District in 2016
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Patassi, Akouda Akessiwe, Landoh, Dadja Essoya, Mebiny-Essoh Tchalla, Agballa, Halatoko, Wemboo Afiwa, Assane, Hamadi, Saka, Bayaki, Naba, Mouchedou Abdoukarim, Yaya, Issifou, Edou, Kossi Atsissinta, Tamekloe, Tsidi Agbeko, Banla, Abiba Kere, Davi, Kokou Mawule, Manga, Magloire, Kassankogno, Yao, and Salmon-Ceron, Dominique
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Article Subject ,viruses ,parasitic diseases ,virus diseases - Abstract
Background. Lassa fever belongs to the group of potentially fatal hemorrhagic fevers, never reported in Togo. The aim of this paper is to report the first two cases of Lassa fever infection in Togo. Case Presentation. The two first Lassa fever cases occurred in two expatriate’s health professionals working in Togo for more than two years. The symptoms appeared among two health professionals of a clinic located in Oti district in the north of the country. The absence of clinical improvement after antimalarial treatment and the worsening of clinical symptoms led to the medical evacuation. The delayed diagnosis of the first case led to a fatal outcome. The second case recovered under ribavirin treatment. Conclusion. The emergence of this hemorrhagic fever confirms the existence of Lassa fever virus in Togo. After a period of intensive Ebola virus transmission from 2013 to 2015, this is an additional call for the establishment and enhancement of infection prevention and control measures in the health care setting in West Africa.
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- 2017
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26. Prevalence of SARS-CoV-2 among high-risk populations in Lomé (Togo) in 2020.
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Halatoko, Wemboo Afiwa, Konu, Yao Rodion, Gbeasor-Komlanvi, Fifonsi Adjidossi, Sadio, Arnold Junior, Tchankoni, Martin Kouame, Komlanvi, Koffi Segbeaya, Salou, Mounerou, Dorkenoo, Ameyo Monique, Maman, Issaka, Agbobli, Amétépé, Wateba, Majesté Ihou, Adjoh, Komi Séraphin, Goeh-Akue, Edem, Kao, Yem-bla, Kpeto, Innocent, Pana, Paul, Kinde-Sossou, Rebecca, Tamekloe, Agbeko, Nayo-Apétsianyi, Josée, and Assane, Simon-Pierre Hamadi
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SARS-CoV-2 ,REVERSE transcriptase polymerase chain reaction ,COVID-19 pandemic ,SERODIAGNOSIS ,COVID-19 - Abstract
Background: In December 2019, the COVID-19 outbreak began in China and quickly spread throughout the world and was reclassified as a pandemic in March 2020. The first case of COVID-19 was declared in Togo on March 5. Two months later, few data were available to describe the circulation of the new coronavirus in the country. Objective: This survey aimed to estimate the prevalence of SARS-CoV-2 in high-risk populations in Lomé. Materials and methods: From April 23, 2020, to May 8, 2020, we recruited a sample of participants from five sectors: health care, air transport, police, road transport and informal. We collected oropharyngeal swabs for direct detection through real-time reverse transcription polymerase chain reaction (rRT-PCR) and blood for antibody detection by serological tests. The overall prevalence (current and past) of infection was defined by positivity for both tests. Results: A total of 955 participants with a median age of 36 (IQR 32–43) were included, and 71.6% (n = 684) were men. Approximately 22.1% (n = 212) were from the air transport sector, 20.5% (n = 196) were from the police sector, and 38.7% (n = 370) were from the health sector. Seven participants (0.7%, 95% CI: 0.3–1.6%) had a positive rRT-PCR test result at the time of recruitment, and nine (0.9%, 95% CI: 0.4–1.8%) were seropositive for IgM or IgG against SARS-CoV-2. We found an overall prevalence of 1.6% (n = 15), 95% CI: 0.9–2.6%. Conclusion: The prevalence of SARS-CoV-2 infection among high-risk populations in Lomé was relatively low and could be explained by the various measures taken by the Togolese government. Therefore, we recommend targeted screening. [ABSTRACT FROM AUTHOR]
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- 2020
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27. Improving Cross-Border Preparedness and Response: Lessons Learned from 3 Lassa Fever Outbreaks Across Benin, Nigeria, and Togo, 2017-2019.
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Kakaī, Clement Glèlè, Okunromade, Oyeladun Funmi, Dan-Nwafor, Chioma Cindy, Chabi, Ali Imorou Bah, Martial, Godjedo Togbemabou Primous, Dalhat, Mahmood Muazu, Ward, Sarah, Tante, Ouyi, Nguku, Patrick Mboya, Hamadi, Assane, Ilori, Elsie, Lokossou, Virgil, Brito, Carlos, Ojo, Olubunmi Eyitayo, Kone, Idrissa, Agbeko, Tamekloe Tsidi, Ihekweazu, Chikwe, and Merrill, Rebecca D.
- Abstract
Long-standing cultural, economic, and political relationships among Benin, Nigeria, and Togo contribute to the complexity of their cross-border connectivity. The associated human movement increases the risk of international spread of communicable disease. The Benin and Togo ministries of health and the Nigeria Centre for Disease Control, in collaboration with the Abidjan Lagos Corridor Organization (a 5-country intergovernmental organization) and the US Centers for Disease Control and Prevention, sought to minimize the risk of cross-border outbreaks by defining and implementing procedures for binational and multinational public health collaboration. Through 2 multinational meetings, regular district-level binational meetings, and fieldwork to characterize population movement and connectivity patterns, the countries improved cross-border public health coordination. Across 3 sequential cross-border Lassa fever outbreaks identified in Benin or Togo between February 2017 and March 2019, the 3 countries improved their collection and sharing of patients' cross-border travel histories, shortened the time between case identification and cross-border information sharing, and streamlined multinational coordination during response efforts. Notably, they refined collaborative efforts using lessons learned from the January to March 2018 Benin outbreak, which had a 100% case fatality rate among the 5 laboratory-confirmed cases, 3 of whom migrated from Nigeria across porous borders when ill. Aligning countries' expectations for sharing public health information would assist in reducing the international spread of communicable diseases by facilitating coordinated preparedness and responses strategies. Additionally, these binational and multinational strategies could be made more effective by tailoring them to the unique cultural connections and population movement patterns in the region. [ABSTRACT FROM AUTHOR]
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- 2020
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28. Meningococcal Meningitis Outbreaks in the African Meningitis Belt After Meningococcal Serogroup A Conjugate Vaccine Introduction, 2011–2017.
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Fernandez, Katya, Lingani, Clément, Aderinola, Olaolu Moses, Goumbi, Kadadé, Bicaba, Brice, Edea, Zewdu Assefa, Glèlè, Clément, Sarkodie, Badu, Tamekloe, Agbeko, Ngomba, Armelle, Djingarey, Mamoudou, Bwaka, Ado, Perea, William, and Ronveaux, Olivier
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MENINGOCOCCAL infections ,MENINGITIS ,VACCINES ,NEISSERIA meningitidis ,PUBLIC health surveillance - Abstract
Background In 2010–2017, meningococcal serogroup A conjugate vaccine (MACV) was introduced in 21 African meningitis belt countries. Neisseria meningitidis A epidemics have been eliminated here; however, non-A serogroup epidemics continue. Methods We reviewed epidemiological and laboratory World Health Organization data after MACV introduction in 20 countries. Information from the International Coordinating Group documented reactive vaccination. Results In 2011–2017, 17 outbreaks were reported (31 786 suspected cases from 8 countries, 1–6 outbreaks/year). Outbreaks were of 18–14 542 cases in 113 districts (median 3 districts/outbreak). The most affected countries were Nigeria (17 375 cases) and Niger (9343 cases). Cumulative average attack rates per outbreak were 37–203 cases/100 000 population (median 112). Serogroup C accounted for 11 outbreaks and W for 6. The median proportion of laboratory confirmed cases was 20%. Reactive vaccination was conducted during 14 outbreaks (5.7 million people vaccinated, median response time 36 days). Conclusion Outbreaks due to non-A serogroup meningococci continue to be a significant burden in this region. Until an affordable multivalent conjugate vaccine becomes available, the need for timely reactive vaccination and an emergency vaccine stockpile remains high. Countries must continue to strengthen detection, confirmation, and timeliness of outbreak control measures. [ABSTRACT FROM AUTHOR]
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- 2019
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29. Neisseria meningitidis Serogroup W Meningitis Epidemic in Togo, 2016.
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Mounkoro, Didier, Nikiema, Christelle S, Maman, Issaka, Sakandé, Souleymane, Bozio, Catherine H, Tall, Haoua, Sadji, Adodo Yao, Njanpop-Lafourcade, Berthe-Marie, Sibabe, Agoro, Landoh, Dadja E, Abodji, Essofa O, Kodjo, Agbenoko, Tamekloe, Tsidi A, Essoh, Téné Alima, Maba, Détèma W, Gessner, Bradford D, and Moïsi, Jennifer C
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MENINGOCOCCAL infections ,NEISSERIA meningitidis ,MENINGITIS ,MENINGOCOCCAL vaccines ,EPIDEMICS ,POLYMERASE chain reaction - Abstract
Background During 2014, 4 regions in Togo within the African meningitis belt implemented vaccination campaigns with meningococcal serogroup A conjugate vaccine (MACV). From January to July 2016, Togo experienced its first major Neisseria meningitidis serogroup W (NmW) outbreak. We describe the epidemiology, response, and management of the outbreak. Methods Suspected, probable, and confirmed cases were identified using World Health Organization case definitions. Through case-based surveillance, epidemiologic and laboratory data were collected for each case. Cerebrospinal fluid specimens were analyzed by polymerase chain reaction, culture, or latex agglutination. Vaccination campaigns were conducted in affected districts. Results From January 11 to July 5, 2016, 1995 suspected meningitis cases were reported, with 128 deaths. Among them, 479 (24.0%) were confirmed by laboratory testing, and 94 (4.7%) and 1422 (71.3%) remained as probable and suspected cases, respectively. Seven epidemic districts had cumulative attack rates greater than 100 per 100 000 population. Of the confirmed cases, 91.5% were NmW; 39 of 40 available NmW isolates were sequence type-11/clonal complex-11. Conclusions This outbreak demonstrates that, although high coverage with MACV has reduced serogroup A outbreaks, large meningococcal meningitis outbreaks due to other serogroups may continue to occur; effective multivalent meningococcal conjugate vaccines could improve meningococcal disease prevention within meningitis belt populations. [ABSTRACT FROM AUTHOR]
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- 2019
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30. Characterization of size, structure and purity of serogroup X Neisseria meningitidis polysaccharide, and development of an assay for quantification of human antibodies
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Fang Gao, Kay Lockyer, Barbara Bolgiano, Andrew J. Pollard, Gunnstein Norheim, Tsidi Agbeko Tamekloe, Berthe-Marie Njanpop-Lafourcade, Carolyn Swann, Ouli Xie, Christopher Jones, and Isabelle Delrieu
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Adult ,Serotype ,Magnetic Resonance Spectroscopy ,Adolescent ,Enzyme-Linked Immunosorbent Assay ,Neisseria meningitidis ,medicine.disease_cause ,Polysaccharide ,Microbiology ,Young Adult ,Molecular size ,Serogroup c ,medicine ,Humans ,Serotyping ,Africa South of the Sahara ,Chromatography, High Pressure Liquid ,chemistry.chemical_classification ,Chromatography ,Molecular Structure ,General Veterinary ,General Immunology and Microbiology ,biology ,Polysaccharides, Bacterial ,Public Health, Environmental and Occupational Health ,Molecular Sequence Annotation ,Nuclear magnetic resonance spectroscopy ,Antibodies, Bacterial ,Infectious Diseases ,chemistry ,Immunoglobulin G ,Chromatography, Gel ,biology.protein ,Molecular Medicine ,Antibody ,Heteronuclear single quantum coherence spectroscopy - Abstract
Serogroup X Neisseria meningitidis (MenX) has recently emerged as a cause of localized disease outbreaks in sub-Saharan Africa. In order to prepare for vaccine development, MenX polysaccharide (MenX PS) was purified by standard methods and analyzed for identity and structure by NMR spectroscopy. This study presents the first full assignment of the structure of the MenX PS using (13)C, (1)H and (31)P NMR spectroscopy and total correlation spectroscopy (TOCSY) and (1)H-(13)C heteronuclear single quantum coherence (HSQC). Molecular size distribution analysis using HPLC-SEC with multi-angle laser light scattering (MALLS) found the single peak of MenX PS to have a weight-average molar mass of 247,000g/mol, slightly higher than a reference preparation of purified serogroup C meningococcal polysaccharide. MenX PS tended to be more thermostable than serogroup A PS. A method for the quantification of MenX PS was developed by use of high performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD). A novel and specific ELISA assay for quantification of human anti-MenX PS IgG based on covalent linkage of the MenX PS to functionally modified microtitre plates was developed and found valid for the assessment of the specific antibody concentrations produced in response to MenX vaccination or natural infection. The current work thus provides the necessary background for the development of a MenX PS-based vaccine to prevent meningococcal infection caused by bacteria bearing this capsule.
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- 2016
31. Implementation of Influenza-like illness Sentinel Surveillance in Togo
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Gabriel N Defang, Talla N Nzussouo, Komlan Kossi, Issaka Maman, Williams Thelma, Afiwa Wembo Halatoko, Zoulkarneiri Issa, Tsidi Agbeko Tamekloe, Essoya D Landoh, Pamela Kennedy, Kossi Badziklou, and Abiba Banla Kere
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Orthomyxoviridae ,Influenza-like illness (ILI) ,Sentinel surveillance ,medicine.disease_cause ,Real-Time Polymerase Chain Reaction ,parasitic diseases ,Epidemiology ,Influenza, Human ,medicine ,Humans ,Lomé commune ,Cities ,Child ,Aged ,Influenza-like illness ,biology ,business.industry ,Public health ,Pandemic influenza ,Public Health, Environmental and Occupational Health ,Infant, Newborn ,virus diseases ,Infant ,Middle Aged ,biology.organism_classification ,medicine.disease ,Virology ,Influenza A virus subtype H5N1 ,Influenza ,United States ,Child, Preschool ,Togo ,Christian ministry ,Female ,Medical emergency ,Seasons ,Biostatistics ,business ,Research Article ,Human - Abstract
Background The emergence of avian influenza A/H5N1 in 2003 as well as the pandemic influenza A (H1N1) pdm09 highlighted the need to establish influenza sentinel surveillance in Togo. The Ministry of Health decided to introduce Influenza to the list of diseases with epidemic potential. By April 2010, Togo was actively involved in influenza surveillance. This study aims to describe the implementation of ILI surveillance and results obtained from April 2010 to December 2012. Methods Two sites were selected based on their accessibility and affordability to patients, their adequate specimen storage capacity and transportation system. Patients with ILI presenting at sentinel sites were enrolled by trained medical staff based on the World Health Organization (WHO) case definitions. Oropharyngeal and nasopharyngeal samples were collected and they were tested at the National Influenza Reference Laboratory using a U.S. Centers for Disease Control and Prevention (CDC) validated real time RT-PCR protocol. Laboratory results and epidemiological data were reported weekly and shared with all sentinel sites, Ministry of Health, Division of Epidemiology, WHO and CDC/NAMRU-3. Results From April 2010 to December 2012, a total of 955 samples were collected with 52% of the study population aged between 0 and 4 years. Of the 955 samples, 236 (24.7%) tested positive for influenza viruses; with 136 (14.2%) positive for influenza A and 100 (10.5%) positive for influenza B. The highest influenza positive percentage (30%) was observed in 5–14 years old and patients aged 0–4 and >60 years had the lowest percentage (20%). Clinical symptoms such as cough and rhinorrhea were associated more with ILI patients who were positive for influenza type A than influenza type B. Influenza viruses circulated throughout the year with the positivity rate peaking around the months of January, May and again in October; corresponding respectively to the dry-dusty harmattan season and the long and then the short raining season. The pandemic A (H1N1) pdm09 was the predominantly circulating strain in 2010 while influenza B was the predominantly circulating strain in 2011. The seasonal A/H3N2 was observed throughout 2012 year. Conclusions This study provides information on influenza epidemiology in the capital city of Togo.
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- 2014
32. Responding to Communicable Diseases in Internationally Mobile Populations at Points of Entry and along Porous Borders, Nigeria, Benin, and Togo.
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Merrill, Rebecca D., Rogers, Kimberly, Ward, Sarah, Ojo, Olubumni, Kakaī, Clement Glele, Agbeko, Tamekloe Tsidi, Garba, Hassan, MacGurn, Amanda, Oppert, Marydale, Kone, Idrissa, Bamsa, Olutola, Schneider, Dana, and Brown, Clive
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EPIDEMICS ,WORLD health ,INTERNATIONAL cooperation on public health ,PUBLIC health surveillance - Abstract
Recent multinational disease outbreaks demonstrate the risk of disease spreading globally before public health systems can respond to an event. To ensure global health security, countries need robust multisectoral systems to rapidly detect and respond to domestic or imported communicable diseases. The US Centers for Disease Control and Prevention International Border Team works with the governments of Nigeria, Togo, and Benin, along with Pro-Health International and the Abidjan-Lagos Corridor Organization, to build sustainable International Health Regulations capacities at points of entry (POEs) and along border regions. Together, we strengthen comprehensive national and regional border health systems by developing public health emergency response plans for POEs, conducting qualitative assessments of public health preparedness and response capacities at ground crossings, integrating internationally mobile populations into national health surveillance systems, and formalizing cross-border public health coordination. Achieving comprehensive national and regional border health capacity, which advances overall global health security, necessitates multisectoral dedication to the aforementioned components. [ABSTRACT FROM AUTHOR]
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- 2017
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33. Emergence of Epidemic Neisseria meningitidis Serogroup X Meningitis in Togo and Burkina Faso
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Aly Drabo, Judith E. Mueller, Tsidi Agbeko Tamekloe, Bradford D. Gessner, Berthe Marie Njanpop-Lafourcade, Macaire S. Ouedraogo, Philippe Jaillard, Oumarou Sanou, Seydou Yaro, Kossi Badziklou, Isabelle Delrieu, Jean Ludovic Kambou, Haoua Tall, Agence de Médecine Préventive, École des Hautes Études en Santé Publique [EHESP] (EHESP), and Département Méthodes quantitatives en santé publique (METIS)
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Serotype ,Bacterial Diseases ,Veterinary medicine ,Etiology ,Epidemiology ,lcsh:Medicine ,Meningococcal Disease ,Neisseria meningitidis ,medicine.disease_cause ,Global Health ,Polymerase Chain Reaction ,Disease Outbreaks ,0302 clinical medicine ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Medicine ,Cumulative incidence ,MESH: Incidence ,030212 general & internal medicine ,MESH: Disease Outbreaks ,lcsh:Science ,[SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseases ,Multidisciplinary ,Disease surveillance ,Incidence (epidemiology) ,Incidence ,MESH: Meningitis, Meningococcal ,3. Good health ,Infectious Diseases ,Population Surveillance ,Togo ,Public Health ,African meningitis belt ,Meningitis ,Research Article ,Infectious Disease Control ,030231 tropical medicine ,Meningitis, Meningococcal ,Microbiology ,MESH: Neisseria meningitidis ,Infectious Disease Epidemiology ,MESH: Population Surveillance ,03 medical and health sciences ,Bacterial Meningitis ,parasitic diseases ,Burkina Faso ,Humans ,MESH: Burkina Faso ,Serotyping ,Epidemics ,Biology ,MESH: Epidemics ,MESH: Humans ,business.industry ,lcsh:R ,MESH: Serotyping ,Outbreak ,MESH: Polymerase Chain Reaction ,medicine.disease ,Virology ,MESH: DNA, Viral ,Emerging Infectious Diseases ,MESH: Togo ,DNA, Viral ,lcsh:Q ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Preventive Medicine ,business ,MenAfriVac - Abstract
International audience; Serogroup X meningococci (NmX) historically have caused sporadic and clustered meningitis cases in sub-Saharan Africa. To study recent NmX epidemiology, we analyzed data from population-based, sentinel and passive surveillance, and outbreak investigations of bacterial meningitis in Togo and Burkina Faso during 2006-2010. Cerebrospinal fluid specimens were analyzed by PCR. In Togo during 2006-2009, NmX accounted for 16% of the 702 confirmed bacterial meningitis cases. Kozah district experienced an NmX outbreak in March 2007 with an NmX seasonal cumulative incidence of 33/100,000. In Burkina Faso during 2007-2010, NmX accounted for 7% of the 778 confirmed bacterial meningitis cases, with an increase from 2009 to 2010 (4% to 35% of all confirmed cases, respectively). In 2010, NmX epidemics occurred in northern and central regions of Burkina Faso; the highest district cumulative incidence of NmX was estimated as 130/100,000 during March-April. Although limited to a few districts, we have documented NmX meningitis epidemics occurring with a seasonal incidence previously only reported in the meningitis belt for NmW135 and NmA, which argues for development of an NmX vaccine.
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- 2011
34. Standardizing surveillance of pneumococcal disease
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Knoll, MD, Moïsi, JC, Muhib, FB, Wonodi, CB, Lee, EH, Grant, L, Gilani, Z, Anude, CJ, O'Brien, KL, Cherian, T, Levine, OS, Adhikari, N, Anh, DD, Baggett, H, Batu, R, Brooks, A, Dowell, S, El Arifeen, S, English, M, Fisher, J, Gessner, BD, Kelly, D, Kilgore, P, Lafourcade, BM, Lalitha, MK, Lourd, M, Luby, S, Maloney, S, Mate, C, Mudhune, S, Mueller, J, Murdoch, DR, Naheed, A, Naorat, S, Nyambat, B, Olsen, S, Peruski, LF, Pollard, AJ, Prapasiri, P, Rhodes, J, Saha, SK, Sangare, L, Scott, JAG, Shah, AS, Steinhoff, MC, Tamekloe, TA, Thamthitiwat, S, Thomas, K, Thorson, S, Tuladhar, NR, Wamae, M, Yaro, S, and Zaidi, AKM
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Microbiology (medical) ,Adult ,medicine.medical_specialty ,Asia ,Adolescent ,Surveillance Methods ,Disease ,medicine.disease_cause ,Severity of Illness Index ,Pneumococcal Infections ,Young Adult ,Internal medicine ,Epidemiology ,Streptococcus pneumoniae ,medicine ,Humans ,Data reporting ,Intensive care medicine ,Child ,Aged ,Aged, 80 and over ,business.industry ,Meningitis, Pneumococcal ,Infant, Newborn ,Infant ,Middle Aged ,Pneumonia, Pneumococcal ,medicine.disease ,Pneumococcal infections ,Pneumonia ,Infectious Diseases ,Child, Preschool ,Population Surveillance ,Africa ,Communicable Disease Control ,business ,Meningitis - Abstract
Background. Surveillance for invasive pneumococcal disease has been conducted using a variety of case ascertainment methods and diagnostic tools. Interstudy differences in observed rates of invasive pneumococcal disease could reflect variations in surveillance methods or true epidemiological differences in disease incidence. To facilitate comparisons of surveillance data among countries, investigators of Pneumococcal Vaccines Accelerated Development and Introduction Plan-sponsored projects have developed standard case definitions and data reporting methods. Methods. Investigators developed case definitions for meningitis, pneumonia, and very severe disease using existing World Health Organization guidelines and clinical definitions from Africa and Asia. Standardized case definitions were used to standardize reporting of aggregated results. Univariate analyses were conducted to compare results among countries and to identify factors contributing to detection of Streptococcus pneumoniae. Results. Surveillance sites varied with regard to the age groups targeted, disease syndromes monitored, specimens collected, and laboratory methods employed. The proportion of specimens positive for pneumococcus was greater for cerebrospinal fluid specimens (1.2%-19.4%) than for blood specimens (0.1%-1.4%) in all countries (range, 1.3-38-fold greater). The distribution of disease syndromes and pneumonia severity captured by surveillance differed among countries. The proportion of disease cases with pneumococcus detected varied by syndrome (meningitis, 1.4%-10.8%; pneumonia, 0.2%-1.3%; other, 0.2%-1.2%) and illness severity (nonsevere pneumonia, 0%-2.7%; severe pneumonia, 0.2%-1.2%), although these variations were not consistent for all sites. Antigen testing and polymerase chain reaction increased the proportion of cerebrospinal fluid specimens with pneumococcus identified by 1.3-5.5-fold, compared with culture alone. Conclusions. Standardized case definitions and data reporting enhanced our understanding of pneumococcal epidemiology and enabled us to assess the contributions of specimen type, disease syndrome, pneumonia severity, and diagnostic tools to rate of pneumococcal detection. Broader standardization and more-detailed data reporting would further improve interpretation of surveillance results. © 2009 by the Infectious Diseases Society of America. All rights reserved.
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- 2009
35. Burden of Pneumococcal Disease in Northern Togo before the Introduction of Pneumococcal Conjugate Vaccine.
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Moïsi, Jennifer C., Makawa, Makawa-Sy, Tall, Haoua, Agbenoko, Kodjo, Njanpop-Lafourcade, Berthe-Marie, Tamekloe, Stanislas, Amidou, Moussa, Mueller, Judith E., and Gessner, Bradford D.
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PNEUMOCOCCAL meningitis ,PNEUMOCOCCAL vaccines ,MORTALITY ,DISEASE incidence ,PNEUMOCOCCAL pneumonia ,CHILDREN'S health - Abstract
Background: S. pneumoniae is a leading cause of meningitis morbidity and mortality in the African meningitis belt, but little is known of its contribution to the burden of pneumonia in the region. We aimed to estimate the incidence of pneumococcal disease in children and adults in northern Togo, before the introduction of pneumococcal conjugate vaccine (PCV). Methods and findings: From May 1st 2010 to April 30th 2013, we systematically enrolled all hospitalized patients meeting a case definition of suspected meningitis or clinical pneumonia, residing in Tone or Cinkasse districts, northern Togo and providing informed consent. We collected clinical data and tested biological specimens according to standardized procedures, including bacteriology and PCR testing of cerebro-spinal fluid for meningitis patients and blood cultures and whole blood lytA PCR for pneumonia patients. Chest X-rays (CXR) were interpreted using the WHO methodology. We included 404 patients with meningitis (104 <5 years of age) and 1550 with pneumonia (251 <5 years) over the study period. Of these, 78 (19%) had pneumococcal meningitis (13 <5 years), 574 (37%) had radiologically-confirmed pneumonia (83 <5 years) and 73 (5%) had culture-confirmed pneumococcal pneumonia (2 <5 years). PCV13 serotypes caused 79% (54/68) of laboratory-confirmed pneumococcal meningitis and 83% (29/35) of culture-confirmed pneumococcal pneumonia. Serotype 1 predominated in meningitis (n = 33) but not in pneumonia patients (n = 1). The incidence of pneumococcal disease was 7.5 per 100,000 among children <5 years of age and 14.8 in persons 5 years of age and above in the study area. When considering CXR-confirmed and blood PCR-positive pneumonia cases as likely pneumococcal, incidence estimates increased to 43.7 and 66.0 per 100,000 in each of these age groups, respectively. Incidence was at least 3-fold higher when we restricted the analysis to the urban area immediately around the study hospitals. Conclusions: Our findings highlight the important role of S. pneumoniae as a meningitis and pneumonia-causing pathogen in the African meningitis belt. Pneumococcal disease incidence in our population was substantially lower than expected from global models; we hypothesize that poor access to hospital care led us to substantially underestimate the burden of disease. Surveillance is ongoing and will enable an evaluation of PCV impact, providing novel, high quality data from the region. [ABSTRACT FROM AUTHOR]
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- 2017
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36. Detection and management of the first human anthrax outbreak in Togo.
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Patassi, Akouda Akessiwe, Saka, Bayaki, Landoh, Dadja Essoya, Agbenoko, Kodjo, Tamekloe, Tsidi, and Salmon-Ceron, Dominique
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ANTHRAX ,DISEASE outbreaks ,BACILLUS anthracis ,COMMUNICABLE diseases ,PLASMODIUM falciparum ,ANTIBIOTICS ,COMMUNICABLE disease diagnosis ,MEAT microbiology ,SKIN disease diagnosis ,PENICILLIN ,ANTHRAX diagnosis ,COMMUNICABLE disease epidemiology ,BACILLUS (Bacteria) ,SEPSIS ,SKIN diseases ,DISEASE management ,TREATMENT effectiveness ,CONTACT tracing ,THERAPEUTICS - Abstract
Objective: The aim of this study was to describe and define an outbreak of human anthrax in two villages in the northern savannah region of Togo.Patients and Method: In December 2009, localised groups of deaths occurred among villagers and their livestock, confirmed to be due to anthrax at the district hospital of Dapaong in Northern Togo. The National Disease Control department undertook an investigation to describe the epidemiological, clinical and bacteriological characteristics of this outbreak.Results: Thirty-four individuals presented with clinical manifestations of anthrax. All patients were known to have consumed meat from cattle who had died of unknown causes or had been killed as a result of unknown illness. All patients presented with muco-cutaneous lesions; some had gastro-intestinal, neurological or meningeal symptoms, or septicaemia. One patient was co-infected with Plasmodium falciparum. Six deaths (17.6%) were reported at the beginning of the epidemic; 28 patients were successfully treated with a 10-day course of intravenous Penicillin or oral Amoxicillin. The two factors that contributed to the ultimate resolution of the anthrax outbreak were the increase of community awareness toward health promotion and vaccination of all farm animals.Conclusion: Although six deaths occurred among families' members who were infected, new human anthrax cases were prevented by rapid treatment of victims as well as aggressive public health interventions. However the risk of re-emergence of infection and exposure still exists as there are no existing epidemiological mapping and no identification of infected zones; and furthermore, no functional anthrax surveillance system exists in the affected region. [ABSTRACT FROM AUTHOR]- Published
- 2016
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37. Implementation of Influenza-like illness Sentinel Surveillance in Togo.
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Maman, Issaka, Badziklou, Kossi, Landoh, Essoya D., Halatoko, Afiwa W., Nzussouo, Talla N., Defang, Gabriel N., Tamekloe, Tsidi A., Kennedy, Pamela J., Thelma, Williams, Kossi, Komlan, Issa, Zoulkarneiri, and Kere, Abiba B.
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INFLUENZA A virus ,PUBLIC health surveillance ,RESPIRATORY infections ,DISEASE prevalence ,INFLUENZA A virus, H1N1 subtype - Abstract
Background: The emergence of avian influenza A/H5N1 in 2003 as well as the pandemic influenza A (H1N1) pdm09 highlighted the need to establish influenza sentinel surveillance in Togo. The Ministry of Health decided to introduce Influenza to the list of diseases with epidemic potential. By April 2010, Togo was actively involved in influenza surveillance. This study aims to describe the implementation of ILI surveillance and results obtained from April 2010 to December 2012. Methods: Two sites were selected based on their accessibility and affordability to patients, their adequate specimen storage capacity and transportation system. Patients with ILI presenting at sentinel sites were enrolled by trained medical staff based on the World Health Organization (WHO) case definitions. Oropharyngeal and nasopharyngeal samples were collected and they were tested at the National Influenza Reference Laboratory using a U.S. Centers for Disease Control and Prevention (CDC) validated real time RT-PCR protocol. Laboratory results and epidemiological data were reported weekly and shared with all sentinel sites, Ministry of Health, Division of Epidemiology, WHO and CDC/NAMRU-3. Results: From April 2010 to December 2012, a total of 955 samples were collected with 52% of the study population aged between 0 and 4 years. Of the 955 samples, 236 (24.7%) tested positive for influenza viruses; with 136 (14.2%) positive for influenza A and 100 (10.5%) positive for influenza B. The highest influenza positive percentage (30%) was observed in 5-14 years old and patients aged 0-4 and >60 years had the lowest percentage (20%). Clinical symptoms such as cough and rhinorrhea were associated more with ILI patients who were positive for influenza type A than influenza type B. Influenza viruses circulated throughout the year with the positivity rate peaking around the months of January, May and again in October; corresponding respectively to the dry-dusty harmattan season and the long and then the short raining season. The pandemic A (H1N1) pdm09 was the predominantly circulating strain in 2010 while influenza B was the predominantly circulating strain in 2011. The seasonal A/H3N2 was observed throughout 2012 year. Conclusions: This study provides information on influenza epidemiology in the capital city of Togo. [ABSTRACT FROM AUTHOR]
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- 2014
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38. Characterization of size, structure and purity of serogroup X Neisseria meningitidis polysaccharide, and development of an assay for quantification of human antibodies
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Xie, Ouli, Bolgiano, Barbara, Gao, Fang, Lockyer, Kay, Swann, Carolyn, Jones, Christopher, Delrieu, Isabelle, Njanpop-Lafourcade, Berthe-Marie, Tamekloe, Tsidi Agbeko, Pollard, Andrew J., and Norheim, Gunnstein
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POLYSACCHARIDES , *GLYCAN structure , *NEISSERIA meningitidis , *IMMUNOGLOBULINS , *EPIDEMICS , *NUCLEAR magnetic resonance , *SPECTRUM analysis , *MENINGOCOCCAL vaccines , *HIGH performance liquid chromatography - Abstract
Abstract: Serogroup X Neisseria meningitidis (MenX) has recently emerged as a cause of localized disease outbreaks in sub-Saharan Africa. In order to prepare for vaccine development, MenX polysaccharide (MenX PS) was purified by standard methods and analyzed for identity and structure by NMR spectroscopy. This study presents the first full assignment of the structure of the MenX PS using 13C, 1H and 31P NMR spectroscopy and total correlation spectroscopy (TOCSY) and 1H–13C heteronuclear single quantum coherence (HSQC). Molecular size distribution analysis using HPLC–SEC with multi-angle laser light scattering (MALLS) found the single peak of MenX PS to have a weight-average molar mass of 247,000g/mol, slightly higher than a reference preparation of purified serogroup C meningococcal polysaccharide. MenX PS tended to be more thermostable than serogroup A PS. A method for the quantification of MenX PS was developed by use of high performance anion exchange chromatography with pulsed amperometric detection (HPAEC–PAD). A novel and specific ELISA assay for quantification of human anti-MenX PS IgG based on covalent linkage of the MenX PS to functionally modified microtitre plates was developed and found valid for the assessment of the specific antibody concentrations produced in response to MenX vaccination or natural infection. The current work thus provides the necessary background for the development of a MenX PS-based vaccine to prevent meningococcal infection caused by bacteria bearing this capsule. [Copyright &y& Elsevier]
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- 2012
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39. Dynamics of cholera epidemics from Benin to Mauritania
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Moore, S., Dongdem, A. Z., Opare, D., Cottavoz, P., Fookes, M., Sadji, A. Y., Dzotsi, E., Dogbe, M., Jeddi, F., Bidjada, B., Piarroux, M., Valentin, O. T., Glele, C. K., Rebaudet, S., Sow, A. G., Constantin de Magny, Guillaume, Koivogui, L., Dunoyer, J., Bellet, F., Garnotel, E., Thomson, N., Piarroux, R., Aix Marseille Université (AMU), University of Health and Allied Sciences [Ho] (UHAS), The Wellcome Trust Sanger Institute [Cambridge], Infections Parasitaires : Transmission, Physiopathologie et Thérapeutiques (IP-TPT), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)-Service de Santé des Armées, Departement de Parasitologie et Mycologie, Assistance Publique - Hôpitaux de Marseille (APHM), Department of Bacteriology, National Institute of Public Health - National Institute of Hygiene [Poland], Institut Pierre Louis d'Epidémiologie et de Santé Publique (iPLESP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Pasteur de Dakar, Réseau International des Instituts Pasteur (RIIP), Institut National de Santé Publique [Conakry, Guinée] (INSP), Ministère de la Santé [Conakry, Guinea], Hôpital d'Instruction des Armées Laveran, Service de Santé des Armées, Vecteurs - Infections tropicales et méditerranéennes (VITROME), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut de Recherche Biomédicale des Armées [Brétigny-sur-Orge] (IRBA), The investigations in Guinea, Ghana, Togo and Benin were supported by UNICEF WCARO and APHM –Hôpital de la Timone/Aix-Marseille University. WTSI authors were funded by Wellcome Trust grant number 098051. Certain cholera experts from UNICEF WCARO assisted in organizing the project (establishing meetings with key stakeholders) and data collection. JD and FB also contributed to manuscript redaction. The funding bodies at UNICEF WCARO, APHM and Wellcome Trust had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript., This study was possible thanks to extensive collaborations in each country. In Ghana, the authors would like to first extend our gratitude to our collaborators at the University of Health and Allied Sciences (Ho, Volta Region, Ghana), Bismarck Dinko, Gideon Kye-Duodu, Frank Nyonator, Fred Binka, and John Tampuori. We are extremely grateful to the staff of the Ghana Health Service, especially Badu Sarkodie, and the Disease Surveillance Officers who collected specimens and data on cholera cases. We thank Kweku Quansah from the Environmental Health and Sanitation Directorate for assistance with the study in Accra. We also thank Lawrence Henry Ofosu-Appiah and Lorreta Antwi from the National Public Health Reference Laboratory in Accra for technical assistance preparing and shipping the V. cholerae isolates. We also thank Ashon Ato, James Addo, Bernard Bright Davies-Teye, John Eleeza, Jonas Amanu, Rosemary Gbadzida, Joseph Kwami Degley, and Atsu Seake-Kwawu for assistance and discussions. We are also thankful to Anthony Karikari from Water Research Institute, Achimota for advice and discussions. We are very thankful to the UNICEF Accra office for their support: Samuel Amoako-Mensah, Kassim Yakubu Al-hassan, David Duncan, and Daniel Yayemain. In Togo, we thank Stanislas Tamekloe for assistance with the epidemiological data. We are also thankful to Kossivi Agbelenko Afanvi, Balanhewa Aguem-Massina, Amidou Sani, and Kwoami Dovi (MoH) for assistance in the field and discussions. We extend thanks to the UNICEF office in Lomé, Isselmou Boukhary, Fataou Salami, Tagba Assih, and Magali Romedenne. In Benin, the authors would like to extend gratitude to Gregoire Adadja, Nadine Agossa, and Adjakidje Senami Aurel (MoH) for assistance with the epidemiological data. We also thank Honore Bankole, Francois Hounsou, and Agnes Hounwanou from the Bacteriology Laboratory, Cotonou for discussion regarding the confirmation of patient V. cholerae isolates. We thank the staff at the UNICEF office in Cotonou: Mamadou Mouctar Baldé, Isabelle Sévédé-Bardem, Adama Ouedraogo, and Wilfried Houeto. In Ivory Coast, we would extend our gratitude to Bisimwa Ruhana Mirindi for organizing our field mission and important discussions. The researchers would like to thank Lindsey Osei (Aix-Marseille University) for assisting with establishment of the mission protocol. We thank Hélène Thefenne and Jean-Jacques Depina (L’Hopital d'Instruction des Armées Laveran, Marseille) for support with the V. cholerae isolates. The authors thank Lindsay Osei for helping to establish the protocol and initial collaborations with our colleagues in Ghana. We thank Dustin Robertson for assistance writing the manuscript. The authors thank Anne-Cécile Normand for assistance with the MLVA. Concerning the missions in Guinea and Sierra Leone, the authors thank all staff who took part in patient care, field investigations, data reporting as well as sample collection, transport, processing, and analysis. In particular, the authors are indebted to Sakoba Keita, Amara Jambai, and Leonard Heyerdahl (AMP, France). We are also grateful to H Diallo (INSP, Guinea) for performing initial vibrio cultures and the Aix-Marseille University staff who sequenced and analyzed the V. cholerae clone from Guinea. Finally, we are extremely grateful to all the families, village chiefs, fishermen, drivers, water vendors, and many others who took the time to explain to us their experience with cholera., Service de Santé des Armées-Assistance Publique - Hôpitaux de Marseille (APHM)-Aix Marseille Université (AMU)-Institut de Recherche pour le Développement (IRD), National Institute of Hygiene, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Institut de Recherche Biomédicale des Armées (IRBA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)
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Bacterial Diseases ,lcsh:Arctic medicine. Tropical medicine ,Genotype ,lcsh:RC955-962 ,Minisatellite Repeats ,Pathology and Laboratory Medicine ,Ghana ,Microbiology ,Disease Outbreaks ,Sierra Leone ,Geographical Locations ,Cholera ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Vibrio Cholerae ,parasitic diseases ,Medicine and Health Sciences ,Benin ,Humans ,Epidemics ,Microbial Pathogens ,Phylogeny ,Vibrio ,Bacteria ,lcsh:Public aspects of medicine ,Mauritania ,Organisms ,Biology and Life Sciences ,lcsh:RA1-1270 ,Tropical Diseases ,Bacterial Pathogens ,Infectious Diseases ,Medical Microbiology ,Togo ,People and Places ,Africa ,Guinea ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Pathogens ,Research Article ,Neglected Tropical Diseases - Abstract
Background The countries of West Africa are largely portrayed as cholera endemic, although the dynamics of outbreaks in this region of Africa remain largely unclear. Methodology/Principal findings To understand the dynamics of cholera in a major portion of West Africa, we analyzed cholera epidemics from 2009 to 2015 from Benin to Mauritania. We conducted a series of field visits as well as multilocus variable tandem repeat analysis and whole-genome sequencing analysis of V. cholerae isolates throughout the study region. During this period, Ghana accounted for 52% of the reported cases in the entire study region (coastal countries from Benin to Mauritania). From 2009 to 2015, we found that one major wave of cholera outbreaks spread from Accra in 2011 northwestward to Sierra Leone and Guinea in 2012. Molecular epidemiology analysis confirmed that the 2011 Ghanaian isolates were related to those that seeded the 2012 epidemics in Guinea and Sierra Leone. Interestingly, we found that many countries deemed “cholera endemic” actually suffered very few outbreaks, with multi-year lulls. Conclusions/Significance This study provides the first cohesive vision of the dynamics of cholera epidemics in a major portion of West Africa. This epidemiological overview shows that from 2009 to 2015, at least 54% of reported cases concerned populations living in the three urban areas of Accra, Freetown, and Conakry. These findings may serve as a guide to better target cholera prevention and control efforts in the identified cholera hotspots in West Africa., Author summary We analyzed cholera epidemics from Benin to Mauritania, during 2009 to 2015, and performed a series of field visits as well as molecular epidemiology analyses of V. cholerae isolates from most recent epidemics throughout West Africa. We found that at least 54% of cases concerned populations living in the three urban areas of Accra, Freetown, and Conakry. Accra, Ghana represented the main cholera hotspot in the entire study region. Our findings indicate that the water network system in Accra may play a role in the rapid diffusion of cholera throughout the city. As observed in Accra, Conakry, and Freetown, once cholera cases arrive in overpopulated urban settings with poor sanitation, increased rainfall facilitated the contamination of unprotected water sources with human waste from cholera patients, thus promoting a rapid increase in cholera incidence. To more efficiently and effectively combat cholera in West Africa, these findings may serve as a guide to better target cholera prevention and control interventions.
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- 2018
40. Pneumococcal serotype distribution among meningitis cases from Togo and Burkina Faso during 2007–2009
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Gessner, Bradford D., Sanou, Oumarou, Drabo, Aly, Tamekloe, Tsidi Agbeko, Yaro, Seydou, Tall, Haoua, Moïsi, Jennifer C., Mueller, Judith E., and Njanpop-LaFourcade, Berthe-Marie
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PNEUMOCOCCAL vaccines , *POLYMERASE chain reaction , *PNEUMOCOCCAL meningitis , *SEROTYPES , *MENINGITIS , *CEREBROSPINAL fluid - Abstract
Abstract: We evaluated pneumococcal serotype/group distribution using polymerase chain reaction (PCR) testing on cerebrospinal fluid collected from patients from Burkina Faso and Togo who presented for care during 2007–2009. We identified 282 pneumococcal meningitis cases based on PCR, latex agglutination, or culture, of which 206 underwent serotyping. Serotype 1 was identified for 18% of serotyped cases from patients aged <5 years and 66% of those aged ≥5 years. The 13-valent and 10-valent pneumococcal conjugate vaccines (PCV-13 and PCV-10) contain 53% of serotypes identified among children age <5 years and 76–77% among persons aged ≥5 years. Pneumococcal meningitis was highly seasonal regardless of serotype. Data from this study emphasize the potential usefulness of PCVs among older children and adults. [Copyright &y& Elsevier]
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- 2012
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