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Year : 2005
Tome : 156
Volume : 2
Pages : 77-84
Title : Prevalence for West Nile Virus infection in the horse in the Camargue area, South of France (2001).
Authors : A. LEBLOND, S. ZIENTARA, J. CHADOEUF, N. COMBY, M.A. HENG et P. SABATIER
Summary : West Nile disease is considered as a re-emerging disease in France. An ELISA IgG test was used to test the horses.Among 488 horses sampled, 5.3% were positive. The disease is transmitted by infected mosquitoes to dead - end hosts as humans and horses. Birds are the reservoirs. The survey presented in this paper aimed at seeking for a low - level circulation of West Nile Virus and identifying risk factors for the infection in the horse. Among the horses included in the study, four horses which were IgG negative in 2000 were found positive in 2001. The statistical analysis identified the following risk factors in the environment of the horse studs: breeding of game birds (OR = 6,9; p = 0,002) and the presence of ponds (OR = 10,4; p = 0,008). The spatial analysis suggested the presence of two significant clusters of positive stables in the dry zone. Our results suggest the presence of a low - level circulation of West Nile Virus during 2001. The risk factors identified should be evaluated in further studies and, if confirmed, could be included in global surveillance protocols for the early warning of risk of epidemic.
Keywords : West Nile Virus - Horse - ELISA assay - Risk factor - Environment - Cluster.
Correspondence : A. LEBLOND
Adress : TIMC - UMR 5525 - Unit Environnement et Prvision de la Sant des Populations, Ecole Nationale Vtrinaire de Lyon, 1 avenue Bourgelat , 69280 Marcy lEtoile, France. Email : : a.leblond@vet-lyon.fr
Link : pdf

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