About: Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010

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About: Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010–2012 Goto Sponge NotDistinct Permalink

An Entity of Type : schema:ScholarlyArticle, within Data Space : wasabi.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010–2012
Creator	Widdowson, Marc-Alain Lagare, Adamou Coulibaly, Daouda Sow, Samba Moen, Ann Badziklou, Kossi Cisse, Assana Duque, Jazmin Makaya, Sonia Maman, Issaka Tamboura, Boubou Tarnagda, Zekiba Williams, Thelma Adedeji, Adebayo Adje, Herve Bara, Ahmed Elkory, Mohamed Keita, Adama Maïnassara, Halima Mcmorrow, Meredith Nzussouo, Ndahwouh Shilo, Paul
Source	PMC
abstract	BACKGROUND: Over 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. METHODS: We 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. RESULTS: Of 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. CONCLUSIONS: Influenza 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. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12879-017-2839-1) contains supplementary material, which is available to authorized users.
has issue date	2017-12-04(xsd:dateTime)
bibo:doi	10.1186/s12879-017-2839-1
bibo:pmid	29202715
has license	cc-by
sha1sum (hex)	80c9179236f8b034ec0763a86209141ea894b2ec
schema:url	https://doi.org/10.1186/s12879-017-2839-1
resource representing a document's title	Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010–2012
has PubMed Central identifier	PMC5716025
has PubMed identifier	29202715
schema:publication	BMC Infect Dis
resource representing a document's body	covid:80c9179236f8b034ec0763a86209141ea894b2ec#body_text
is schema:about of	named entity 'influenza-like illness' named entity 'influenza' named entity 'Surveillance' named entity 'specimens' named entity 'majority' named entity 'capacity' named entity 'number' named entity 'regions' named entity 'period' named entity 'robust' named entity 'January 2010' covid:arg/80c9179236f8b034ec0763a86209141ea894b2ec named entity 'sites' named entity 'definitions' named entity 'shape' named entity 'continued' named entity 'number' named entity 'Nigeria' named entity 'influenza B' named entity 'influenza A' named entity 'Niger' named entity 'samples' named entity 'ILI' named entity 'positive' named entity 'West African' named entity 'H1N1' named entity 'influenza' named entity 'H3N2' named entity 'SARI' named entity 'influenza' named entity 'SARI' named entity 'Influenza' named entity 'ILI' named entity 'influenza' named entity 'ILI' named entity 'West Africa' named entity 'influenza' named entity 'influenza' named entity 'influenza' named entity 'Cote d'Ivoire' named entity 'influenza transmission' named entity 'denominator data' named entity '2009 pandemic' named entity 'Mali' named entity 'influenza' named entity 'influenza' named entity 'influenza' named entity 'Africa' named entity 'influenza' named entity 'H3N2' named entity 'Mauritania' named entity 'January 1, 2010' named entity 'A(H1N1)pdm09' named entity 'influenza' named entity 'influenza' named entity 'influenza' named entity 'Ghana' named entity 'SARI' named entity 'SARI' named entity 'ILI'

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