Prevalência e fatores de risco para a leptospirose em bovinos de Mato Grosso do Sul

Figueiredo A.O., Pellegrin A.O., Goncalves V.S.P., Freitas E.B., Monteiro L.A.R.C., Oliveira J.M. & Osorio A.L.A.R. 2009. (Prevalence and risk factors for bovine leptospirosis in Mato Grosso do Sul, Brazil.) Prevalencia e fatores de risco para a leptospirose em bovinos do Mato Grosso do Sul. Pesquisa Veterinaria Brasileira 29(5):375- 381. Programa Mestrado em Ciencia Animal, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS 79070-900, Brazil. E-mail: line_figueiredo@yahoo.com.br The prevalence of anti-Leptospira spp. antibodies was estimated for female cattle aged 24 months or older. The sample comprised 178 herds from 22 counties in the state of Mato Grosso do Sul, Brazil. The risk factors associated with the presence of infeccion were investigated. A total of 2,573 blood serum samples were tested against 10 leptospira serovars using the microagglutination test (MAT). Titers of 100 or higher for one or more serovars were detected in 1,801 females (98.8%) from 161 herds (96.5%). Serovar Hardjo (65.6%) was the most frequent, followed by serovar Wolffi (12.3%). These results suggest that bovine leptospirosis is widespread in all the counties under study, with a high prevalence both at the animal and the herd level. Beef farms and the Zebu breed were associated to the higher risk of herd infection by leptospiras.