Use of Sentinel Chickens to Study the Transmission Dynamics of West Nile Virus in a Sahelian Ecosystem

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 betwee...

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Bibliographic Details
Published inEpidemiology and infection Vol. 136; no. 4; pp. 525 - 528
Main Authors Chevalier, V., Lancelot, R., Diaïte, A., Mondet, B., de Lamballerie, X.
Format Journal Article
LanguageEnglish
Published Cambridge University Press 01.04.2008
Subjects
Chickens
Disease transmission
Epidemiology
Horses
Mosquitos
Ponds
Rain
Rainy seasons
Short Report
Viruses
West Nile virus
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Summary: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.
ISSN:0950-2688
1469-4409
DOI:10.1017/S09050268807008801