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Year 2018 - Volume 38, Number 1
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Prevalence of leptospirosis in cattle herds in the Pantanal of Mato Grosso do Sul, 38(1):41-47
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ABSTRACT.- Miashiro A.F., Vasconcellos S.A., Morais Z.M., Souza G.O., Leal Filho J.M., Figueiredo A.O. & Pellegrin A.O. 2018. [Prevalence of leptospirosis in cattle herds in the Pantanal of Mato Grosso do Sul.] Prevalência de leptospirose em rebanhos bovinos no Pantanal de Mato Grosso do Sul. Pesquisa Veterinária Brasileira 38(1):41-47. Embrapa Pantanal, Empresa Brasileira de Pesquisa Agropecuária, Rua 21 de Setembro 1880, Cx. Postal 109, Corumbá, MS 79320-900, Brazil. E-mail: aiesca.pellegrin@embrapa.br
This is an epidemiological study of leptospirosis in 24 month-old females from 246 herds. Two thousand, seven hundred and sixty six (2,766) animals were randomly sampled in the nine counties comprising the region of Pantanal of Mato Grosso do Sul, Brazil. The risk factors associated with the disease were also identified. Blood samples were collected from September to November 2009 and examined by the microscopic agglutination test (MAT) against a collection of 24 live antigens of Leptospira spp., representatives of serovars Australis, Bratislava, Autumnalis, Butembo, Castellonis, Batavie, Canicola Whitcombi, Cynopteri, Grippotyphosa, Hebdomadis, Copenhageni, Icterohaemorrhagiae, Javanica, Panama, Pomona, Pyrogenes, Hardjo, Wolffi, Shermani, Tarassovi, Sentot, Andamana, and Patoc. Additionally, twelve representatives of Leptospira strains isolated in Brazil were added to the collection of antigens for the microscopic agglutination test (MAT). The apparent prevalence was 66% and the actual prevalence of infected animals was 79.80%, with a confidence interval of 95% (78.3 to 81.3) and 241 herds having at least one reactive animal. The most likely serovars were Hardjo followed by Wolffi. Results show that bovine leptospirosis is still present in Pantanal, with high prevalence both in animals and herds, the main risk factors for the disease being the type of cattle farming and breeding. |
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