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Distribution of Equine Infectious Anemia in Horses in the North of Minas Gerais State, Brazil

Correspondence: ¹ Corresponding Author: Dominique J Bicout, Biomathematics and Epidemiology Unit – TIMC, National Veterinary School of Lyon, 1 avenue Bourgelat, B.P. 83, 69280 Marcy l'Etoile, France, bicout{at}ill.fr

The paper examines the prevalence of equine infectious anemia (EIA) in horse populations in the northern part (comprising 89 cities) of Minas Gerais State, Brazil, from January 2002 to December 2004. Data on 8,981 agar gel immunodiffusion test results from the region were used as input for a statistical and autoregressive analysis model to construct a city-level map of the distribution of EIA prevalence. The following EIA prevalence (P) levels were found: 49 cities with 0 < P 0.5%, 26 with 0.5% < P 1.5%, 10 with 1.5% < P 5%, and 4 with 5% < P 25%.

Key Words: Brazil • equine infectious anemia virus • prevalence • relative risk