ArticleBMC infectious diseases2017
Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010-2012.
Article in BMC infectious diseases, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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13 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.
- The epidemiology of seasonal influenza after the 2009 influenza pandemic in Africa: a systematic review.African health sciences · 2020Pooled it
- Genomic Surveillance and Phylogenetic Analysis of Influenza A(H1N1) pdm09 and A(H3N2) Viruses in Burkina Faso, 2024.Advances in virology · 2026Article
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- Circulation and seasonality of influenza viruses in different transmission zones in Africa.BMC infectious diseases · 2022Article
- Atypical B cells up-regulate costimulatory molecules during malaria and secrete antibodies with T follicular helper cell support.Science immunology · 2022Article
- The first epidemiological and virological influenza surveillance in the Republic of Guinea revealed the predominance of influenza A/H3N2 and B Victoria viruses.Epidemiology and infection · 2021Article
- Comparison of performance between Fast Track Diagnostics Respiratory Kit and the CDC global reference laboratory for influenza rRT-PCR panel for detection of influenza A and influenza B.Influenza and other respiratory viruses · 2021Article
- Plasmodium falciparum-specific IgM B cells dominate in children, expand with malaria, and produce functional IgM.The Journal of experimental medicine · 2021Article
- Converting a Small Surgical Team into a Pandemic Response Team for an Isolated Population.Journal of the American College of Surgeons · 2020Article
- Burden and seasonality of medically attended influenza like illness (ILI) in Ethiopia, 2012 to 2017.BMC infectious diseases · 2020Article
- Circulation of influenza virus from 2009 to 2018 in Cameroon: 10 years of surveillance data.PloS one · 2019Article
- Epidemiology of influenza in Ethiopia: findings from influenza sentinel surveillance and respiratory infection outbreak investigations, 2009-2015.BMC infectious diseases · 2018Article
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22 authors at 8 institutions in 8 countries.
Funding
Abstract
backgroundOver the last decade, capacity for influenza surveillance and research in West Africa has strengthened. Data from these surveillance systems showed influenza A(H1N1)pdm09 circulated in West Africa later than in other regions of the continent.
methodsWe contacted 11 West African countries to collect information about their influenza surveillance systems (number of sites, type of surveillance, sampling strategy, populations sampled, case definitions used, number of specimens collected and number of specimens positive for influenza viruses) for the time period January 2010 through December 2012.
resultsOf the 11 countries contacted, 8 responded: Burkina Faso, Cote d'Ivoire, Mali, Mauritania, Niger, Nigeria, Sierra Leone and Togo. Countries used standard World Health Organization (WHO) case definitions for influenza-like illness (ILI) and severe acute respiratory illness (SARI) or slight variations thereof. There were 70 surveillance sites: 26 SARI and 44 ILI. Seven countries conducted SARI surveillance and collected 3114 specimens of which 209 (7%) were positive for influenza viruses. Among influenza-positive SARI patients, 132 (63%) were influenza A [68 influenza A(H1N1)pdm09, 64 influenza A(H3N2)] and 77 (37%) were influenza B. All eight countries conducted ILI surveillance and collected 20,375 specimens, of which 2278 (11%) were positive for influenza viruses. Among influenza-positive ILI patients, 1431 (63%) were influenza A [820 influenza A(H1N1)pdm09, 611 influenza A(H3N2)] and 847 (37%) were influenza B. A majority of SARI and ILI case-patients who tested positive for influenza (72% SARI and 59% ILI) were children aged 0-4 years, as were a majority of those enrolled in surveillance. The seasonality of influenza and the predominant influenza type or subtype varied by country and year.
conclusionsInfluenza A(H1N1)pdm09 continued to circulate in West Africa along with influenza A(H3N2) and influenza B during 2010-2012. Although ILI surveillance systems produced a robust number of samples during the study period, more could be done to strengthen surveillance among hospitalized SARI case-patients. Surveillance systems captured young children but lacked data on adults and the elderly. More data on risk groups for severe influenza in West Africa are needed to help shape influenza prevention and clinical management policies and guidelines.
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