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Delayed 2009 Pandemic Influenza A Virus Subtype H1N1 Circulation in West Africa, May 2009–April 2010

Abstract : To understand 2009 pandemic influenza A virus subtype H1N1 (A[H1N1]pdm09) circulation in West Africa, we collected influenza surveillance data from ministries of health and influenza laboratories in 10 countries, including Cameroon, from 4 May 2009 through 3 April 2010. A total of 10,203 respiratory specimens were tested, of which 25% were positive for influenza virus. Until the end of December 2009, only 14% of all detected strains were A(H1N1)pdm09, but the frequency increased to 89% from January through 3 April 2010. Five West African countries did not report their first A(H1N1)pdm09 case until 6 months after the emergence of the pandemic in North America, in April 2009. The time from first detection of A(H1N1)pdm09 in a country to the time of A(H1N1)pdm09 predominance varied from 0 to 37 weeks. Seven countries did not report A(H1N1)pdm09 predominance until 2010. Introduction and transmission of A(H1N1)pdm09 were delayed in this region.
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https://hal-riip.archives-ouvertes.fr/pasteur-03238564
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Submitted on : Thursday, May 27, 2021 - 10:41:36 AM
Last modification on : Saturday, June 26, 2021 - 3:02:22 AM

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Ndahwouh Talla Nzussouo, Jennifer Michalove, Ousmane Diop, Richard Njouom, Maria de Lourdes Monteiro, et al.. Delayed 2009 Pandemic Influenza A Virus Subtype H1N1 Circulation in West Africa, May 2009–April 2010. Journal of Infectious Diseases, Oxford University Press (OUP), 2012, 206 (suppl_1), pp.S101-S107. ⟨10.1093/infdis/jis572⟩. ⟨pasteur-03238564⟩

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