利用哨兵鸡研究西尼罗河病毒在萨赫勒生态系统中的传播动态。
Use of sentinel chickens to study the transmission dynamics of West Nile virus in a sahelian ecosystem.
作者信息
Chevalier V, Lancelot R, Diaïte A, Mondet B, De Lamballerie X
机构信息
CIRAD, UPR 'Epidemiology and ecology, Campus International de Baillarguet, Montpellier, France.
出版信息
Epidemiol Infect. 2008 Apr;136(4):525-8. doi: 10.1017/S0950268807008801. Epub 2007 Jun 11.
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.
在2003年雨季期间，对哨兵鸡进行了一项后续调查，以评估西尼罗河病毒（WNV）在萨赫勒生态系统——费洛（塞内加尔）中的季节性传播情况。鸡的估计发病率为14%（95%置信区间7-29），7月至9月间传播水平很低，9月至10月间出现传播高峰。将这些结果与同年在同一地区对马匹进行的先前横向血清学研究所得估计值进行比较，凸显了哨兵鸡在估计WNV传播率方面的相关性。传统上，成年蚊子种群在旱季消失，但WN疾病在研究区域呈地方流行。文中讨论了病毒维持的机制。
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