Chevalier V., Lancelot R., Diaite A., 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), p. 525-528. ISSN 0950-2688.
Titre du document
Use of sentinel chickens to study the transmission dynamics of West Nile virus in a sahelian ecosystem
Chevalier V., Lancelot R., Diaite A., Mondet Bernard, de Lamballerie Xavier
Source
Epidemiology and Infection, 2008,
136 (4), p. 525-528 ISSN 0950-2688
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 salielian ecosystem: the Ferlo (Senegal). The estimated incidence rate in chickens was 14% (95%, CI 7-29), with it 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.
