Frequency of antibodies Anti-Leptospira Spp. and Anti-Brucella abortus in bulls of the Amazônia-cerrado econtone
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Data
2015
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Resumo
Brucellosis and Leptospirosis play a particularly significant role when present in cattle herds, as they can
adversely affect the reproductive performance of the herd, therefore causing direct and indirect losses. Because
bulls can mate with many cows, they can spread these diseases throughout the herd. It is therefore important to
assess the reproductive health status of the herd. The purpose of this study was to identify the frequency of anti-
Leptospira spp. and anti-Brucella abortus antibodies in bulls in the microregion of Araguaína, as well as
identify the contributing factors for the occurrence of such diseases. Samples were taken from 165 breeding
bulls from ten rural producers in eight cities of this microregion. They underwent andrological examination and
standard serological tests to diagnosis B. abortus (AAT) and Leptospira spp. (SAM). Among bulls that
underwent B. abortus (AAT) and Leptospira spp. (SAM) tests, 98.1% were considered to be fit for
reproduction. Among the 165 breeding bulls that underwent SAM testing, 67.3% (111) were serum-reagent for
at least one Leptospira spp. serovar, and Hardjo and Wolffi serovars were more frequently found. None of the
animals displayed serological findings for B. abortus as a result of AAT. Among the sampled bulls, the
frequency of anti-Leptospira antibodies in tested bulls was high, but none of the animals tested positive for B.
abortus, this result was associated with the use of PNCEBT by the producers surveyed. As for the
predisposition elements assessed, only herd size was considered to be significant, with a 2.32 fold increase in
the likelihood of occurrence of leptospirosis in farms with more than 1,000 animals.
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Bulls, Infectious diseases, Serology
Citação
DE CASTRO, A. A. P.; JAYME, V. D. S.; GALVÃO S. R.; CAVALCANTE, T. V.; MINHARRO, S.; SANTOS, H. D.; DOS SANTOS, P. A.; ARRIVABENE, M.; MARUO, V. M.; DIAS, F. E. F. Frequency of antibodies Anti-leptospira Spp. and Anti-Brucella abortus in bulls of the Amazônia-cerrado econtone. Journal of Animal Science Advances, Eastleigh, v. 5, n. 6, p. 1322-1328, 2015.