Evidence of infection by H5N2 highly pathogenic avian influenza viruses in healthy wild waterfowl

Gaidet Nicolas, Cattoli Giovanni, Hammoumi Saliha, Newman Scott, Hagemeijer Ward, Takekawa John Y., Cappelle Julien, Dodman Tim, Joannis Tony M., Gil Patricia, Monne Isabella, Fusaro Alice, Capua Ilaria, Manu Shiiwuua, Micheloni Pierfrancesco, Ottosson Ulf, Mshelbwala John H., Lubroth Juan, Domenech Joseph, Monicat François. 2008. Evidence of infection by H5N2 highly pathogenic avian influenza viruses in healthy wild waterfowl. PLoS Pathogens, 4 (8) : 1-9.

Type d'url non précisé : http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1000127

Résumé : The potential existence of a wild bird reservoir for highly pathogenic avian influenza (HPAI) has been recently questioned by the spread and the persisting circulation of H5N1 HPAI viruses, responsible for concurrent outbreaks in migratory and domestic birds over Asia, Europe, and Africa. During a large-scale surveillance programme over Eastern Europe, the Middle East, and Africa, we detected avian influenza viruses of H5N2 subtype with a highly pathogenic (HP) viral genotype in healthy birds of two wild waterfowl species sampled in Nigeria. We monitored the survival and regional movements of one of the infected birds through satellite telemetry, providing a rare evidence of a non-lethal natural infection by an HP viral genotype in wild birds. Phylogenetic analysis of the H5N2 viruses revealed close genetic relationships with H5 viruses of low pathogenicity circulating in Eurasian wild and domestic ducks. In addition, genetic analysis did not reveal known gallinaceous poultry adaptive mutations, suggesting that the emergence of HP strains could have taken place in either wild or domestic ducks or in non-gallinaceous species. The presence of coexisting but genetically distinguishable avian influenza viruses with an HP viral genotype in two cohabiting species of wild waterfowl, with evidence of non-lethal infection at least in one species and without evidence of prior extensive circulation of the virus in domestic poultry, suggest that some strains with a potential high pathogenicity for poultry could be maintained in a community of wild waterfowl.

Mots-clés Agrovoc : Influenzavirus aviaire, surveillance épidémiologique, oiseau aquatique, migration animale, animal sauvage, phylogénie, télédétection, biologie moléculaire, génome, pouvoir pathogène, transmission des maladies, infection, grippe aviaire

Mots-clés géographiques Agrovoc : Nigéria

Mots-clés complémentaires : Émergence

Classification Agris : L73 - Maladies des animaux

Champ stratégique Cirad : Axe 4 (2005-2013) - Santé animale et maladies émergentes

Auteurs et affiliations

• Gaidet Nicolas, CIRAD-ES-UPR AGIRs (FRA)
• Cattoli Giovanni, Istituto zooprofilattico sperimentale delle Venezie (ITA)
• Hammoumi Saliha
• Newman Scott, FAO (ITA)
• Hagemeijer Ward, Wetlands International (NLD)
• Takekawa John Y., US Geological Survey (USA)
• Cappelle Julien, CIRAD-ES-UPR AGIRs (FRA) ORCID: 0000-0001-7668-1971
• Dodman Tim, Wetlands International (NLD)
• Joannis Tony M., NVRI (NGA)
• Gil Patricia, CIRAD-BIOS-UPR Contrôle des maladies (FRA) ORCID: 0000-0001-7984-7340
• Monne Isabella, Istituto zooprofilattico sperimentale delle Venezie (ITA)
• Fusaro Alice, Istituto zooprofilattico sperimentale delle Venezie (ITA)
• Capua Ilaria, Istituto zooprofilattico sperimentale delle Venezie (ITA)
• Manu Shiiwuua, APLORI (NGA)
• Micheloni Pierfrancesco, INFS (ITA)
• Ottosson Ulf, Ottenby Bird Observatory (LUX)
• Mshelbwala John H., Federal Department of Forestry (NGA)
• Lubroth Juan, FAO (ITA)
• Domenech Joseph, FAO (ITA)
• Monicat François, CIRAD-ES-UPR AGIRs (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/546007/)

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