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Kremer J, Langlet J, Skraber S, Weicherding P, Weber B, Cauchie HM, De Landtsheer S, Even J, Muller C, Hoffmann L, Mossong J. Genetic diversity of noroviruses from outbreaks, sporadic cases and wastewater in Luxembourg 2008–2009. Clin Microbiol Infect 2011; 17:1173-6. [DOI: 10.1111/j.1469-0691.2010.03407.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ducatez MF, Olinger CM, Owoade AA, Tarnagda Z, Tahita MC, Sow A, De Landtsheer S, Ammerlaan W, Ouedraogo JB, Osterhaus ADME, Fouchier RAM, Muller CP. Molecular and antigenic evolution and geographical spread of H5N1 highly pathogenic avian influenza viruses in western Africa. J Gen Virol 2007; 88:2297-2306. [PMID: 17622635 DOI: 10.1099/vir.0.82939-0] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In Africa, highly pathogenic avian influenza H5N1 virus was first detected in northern Nigeria and later also in other regions of the country. Since then, seven other African countries have reported H5N1 infections. This study reports a comparison of full-length genomic sequences of H5N1 isolates from seven chicken farms in Nigeria and chicken and hooded vultures in Burkina Faso with earlier H5N1 outbreaks worldwide. In addition, the antigenicity of Nigerian H5N1 isolates was compared with earlier strains. All African strains clustered within three sublineages denominated A (south-west Nigeria, Niger), B (south-west Nigeria, Egypt, Djibouti) and C (northern Nigeria, Burkina Faso, Sudan, Côte d'Ivoire), with distinct nucleotide and amino acid signatures and distinct geographical distributions within Africa. Probable non-African ancestors within the west Asian/Russian/European lineage distinct from the south-east Asian lineages were identified for each sublineage. All reported human cases in Africa were caused by sublineage B. Substitution rates were calculated on the basis of sequences from 11 strains from a single farm in south-west Nigeria. As H5N1 emerged essentially at the same time in the north and south-west of Nigeria, the substitution rates confirmed that the virus probably did not spread from the north to the south, given the observed sequence diversity, but that it entered the country via three independent introductions. The strains from Burkina Faso seemed to originate from northern Nigeria. At least two of the sublineages also circulated in Europe in 2006 as seen in Germany, further suggesting that the sublineages had already emerged outside of Africa and seemed to have followed the east African/west Asian and Black Sea/Mediterranean flyways of migratory birds.
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Affiliation(s)
- M F Ducatez
- Institute of Immunology, National Public Health Laboratory, 20A rue Auguste Lumière, L-1950 Luxembourg, Luxembourg
| | - C M Olinger
- Institute of Immunology, National Public Health Laboratory, 20A rue Auguste Lumière, L-1950 Luxembourg, Luxembourg
| | - A A Owoade
- Department of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - Z Tarnagda
- Institut de Recherche en Sciences de la Santé, 399 Avenue de la liberté, BP 545 Bobo-Dioulasso, Burkina Faso
| | - M C Tahita
- Institut de Recherche en Sciences de la Santé, 399 Avenue de la liberté, BP 545 Bobo-Dioulasso, Burkina Faso
| | - A Sow
- Laboratoire National de l'Elevage, 03 BP 7026 Ouagadougou, Burkina Faso
| | - S De Landtsheer
- Institute of Immunology, National Public Health Laboratory, 20A rue Auguste Lumière, L-1950 Luxembourg, Luxembourg
| | - W Ammerlaan
- Institute of Immunology, National Public Health Laboratory, 20A rue Auguste Lumière, L-1950 Luxembourg, Luxembourg
| | - J B Ouedraogo
- Institut de Recherche en Sciences de la Santé, 399 Avenue de la liberté, BP 545 Bobo-Dioulasso, Burkina Faso
| | - A D M E Osterhaus
- Department of Virology, Erasmus Medical Center, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - R A M Fouchier
- Department of Virology, Erasmus Medical Center, Dr Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
| | - C P Muller
- Institute of Immunology, National Public Health Laboratory, 20A rue Auguste Lumière, L-1950 Luxembourg, Luxembourg
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Ducatez MF, Olinger CM, Owoade AA, De Landtsheer S, Ammerlaan W, Niesters HGM, Osterhaus ADME, Fouchier RAM, Muller CP. Multiple introductions of H5N1 in Nigeria. Nature 2006; 442:37. [PMID: 16823443 DOI: 10.1038/442037a] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2006] [Accepted: 06/13/2006] [Indexed: 11/09/2022]
Abstract
As the avian influenza virus H5N1 swept from Asia across Russia to Europe, Nigeria was the first country in Africa to report the emergence of this highly pathogenic virus. Here we analyse H5N1 sequences in poultry from two different farms in Lagos state and find that three H5N1 lineages were independently introduced through routes that coincide with the flight paths of migratory birds, although independent trade imports cannot be excluded.
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Affiliation(s)
- M F Ducatez
- Institute of Immunology, National Public Health Laboratory, 1950 Luxembourg
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