Delayed 2009 Pandemic Influenza A Virus Subtype H1N1 Circulation in West Africa, May 2009–April 2010
Ndahwouh Talla Nzussouo
(1, 2)
,
Jennifer Michalove
(1)
,
Ousmane M. Diop
(3)
,
Richard Njouom
(4)
,
Maria de Lourdes Monteiro
(5)
,
Herve Kadjo Adje
(6)
,
Serge Manoncourt
(2)
,
Joseph Amankwa
(7)
,
Lamine Koivogui
(8)
,
Samba Sow
(9)
,
Mohamed Brahim Elkory
(10)
,
Jean-Marc Collard
(11)
,
Ibrahim Dalhatu
(12)
,
Mbayame Ndiaye Niang
(3)
,
Kathryn Lafond
(1)
,
Filomena Moniz
(13)
,
Daouda Coulibaly
(14)
,
Karl C. Kronman
(2)
,
Buhari A. Oyofo
(2)
,
William Ampofo
(15)
,
Boubou Tamboura
(9)
,
Ahmed Ould Bara
(10)
,
Jean-François Jusot
(11)
,
Ekanem Ekanem
(12)
,
Fatoumata Diène Sarr
(3)
,
Inzune Hwang
(1)
,
Claire Cornelius
(2)
,
Babajide Coker
(16)
,
Stephen Lindstrom
(1)
,
Richard Davis
(1)
,
Erica Dueger
(1, 2)
,
Ann Moen
(1)
,
Marc-Alain Widdowson
(1)
1
CDC -
Centers for Disease Control and Prevention [Atlanta]
2 U.S. Naval Medical Research Unit-3
3 Institut Pasteur de Dakar
4 Centre Pasteur du Cameroun
5 Ministry of Health [Cape Verde]
6 Institut Pasteur de Côte d'Ivoire
7 Ghana Health Service [Accra, Ghana]
8 Hôpîtal Donka
9 Centre pour le Développement des Vaccins [Mali]
10 Institut National de Recherche en Santé Publique
11 CERMES - Centre de Recherche Médicale et Sanitaire [Niamey, Niger]
12 NCDC - Nigeria Centre for Disease Control [Abuja, Nigeria]
13 National Laboratory Network [Praia, Cape Verde]
14 INHP - Institut National d'Hygiène Publique [Côte d'Ivoire]
15 NMIMR - Noguchi Memorial Institute for Medical Research [Accra, Ghana]
16 Federal Ministry of Health
2 U.S. Naval Medical Research Unit-3
3 Institut Pasteur de Dakar
4 Centre Pasteur du Cameroun
5 Ministry of Health [Cape Verde]
6 Institut Pasteur de Côte d'Ivoire
7 Ghana Health Service [Accra, Ghana]
8 Hôpîtal Donka
9 Centre pour le Développement des Vaccins [Mali]
10 Institut National de Recherche en Santé Publique
11 CERMES - Centre de Recherche Médicale et Sanitaire [Niamey, Niger]
12 NCDC - Nigeria Centre for Disease Control [Abuja, Nigeria]
13 National Laboratory Network [Praia, Cape Verde]
14 INHP - Institut National d'Hygiène Publique [Côte d'Ivoire]
15 NMIMR - Noguchi Memorial Institute for Medical Research [Accra, Ghana]
16 Federal Ministry of Health
Ndahwouh Talla Nzussouo
Connectez-vous pour contacter l'auteur
- Fonction : Auteur correspondant
- PersonId : 1103304
Connectez-vous pour contacter l'auteur
Jean-Marc Collard
- Fonction : Auteur
- PersonId : 16014
- IdHAL : jean-marc-collard
- ORCID : 0000-0002-4487-1874
Résumé
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.