Use of sentinel chickens to study the transmission dynamics of West Nile virus in a sahelian ecosystem

Chevalier Véronique, Lancelot Renaud, Diaite Amadou, Mondet Bernard, De Lamballerie Xavier. 2008. Use of sentinel chickens to study the transmission dynamics of West Nile virus in a sahelian ecosystem. Epidemiology and Infection, 136 (4) : 525-528.

https://doi.org/10.1017/S0950268807008801

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Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : During the 2003 rainy season, a follow-up survey in sentinel chickens was undertaken to assess the seasonal transmission of West Nile virus (WNV) in a sahelian ecosystem: the Ferlo (Senegal). The estimated incidence rate in chickens was 14% (95% CI 7-29), with a very low level of transmission between July and September, and a transmission peak occurring between September and October. Comparing these results with the estimate obtained from a previous transversal serological study performed on horses the same year in the same area, the relevance of sentinel chickens in estimating the WNV transmission rate is highlighted. Conventionally adult mosquito populations disappear during the dry season but WN disease was shown to be endemic in the study area. The mechanisms of virus maintenance are discussed.

Mots-clés Agrovoc : virus, flavivirus, transmission des maladies, surveillance épidémiologique, animal indicateur, poulet, immunologie, épidémiologie, écosystème

Mots-clés géographiques Agrovoc : Sénégal, Sahel

Mots-clés complémentaires : Émergence, Fièvre du Nil occidental

Classification Agris : L73 - Maladies des animaux

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

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