Durand Benoit, Chevalier Véronique, Pouillot Régis, Labie Jacques, Marendat Ingrid, Murgue Bernadette, Zeller Hervé, Zientara Stéphan
Agence Français de Sécurité Sanitaire des Aliments, Maisons-Alfort, France.
Emerg Infect Dis. 2002 Aug;8(8):777-82. doi: 10.3201/eid0808.010486.
During late summer and autumn 2000, a West Nile fever outbreak in southern France resulted in 76 equine clinical cases; 21 horses died. We report the results of a large serosurvey of all equines within a 10-km radius of laboratory-confirmed cases. Blood samples were obtained from 5,107 equines, distributed in groups of 1 to 91 animals. West Nile virus immunoglobulin (Ig) G antibodies were found in 8.5% of animals (n=432). Forty-two percent of the IgG-positive animals were also IgM positive. Horses living in small groups were more affected than those in large groups. The results suggest that West Nile virus is not endemic in the affected area, the Camargue; rather, sporadic outbreaks are separated by long silent periods.
2000年夏末秋初，法国南部爆发西尼罗河热，导致76例马出现临床症状，21匹马死亡。我们报告了对实验室确诊病例半径10公里范围内所有马匹进行的大规模血清学调查结果。从5107匹马采集了血样，这些马被分成1至91只动物的组。在8.5%的动物（n = 432）中发现了西尼罗河病毒免疫球蛋白（Ig）G抗体。42%的IgG阳性动物IgM也呈阳性。生活在小群体中的马比大群体中的马受影响更大。结果表明，西尼罗河病毒在受影响地区卡马尔格并非地方性流行；相反，散发性疫情之间间隔着漫长的无疫情期。
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