Leptospirose bovina no Estado da Bahia Brasil. Prevalência, sorovares predominantes, distribuição espacial e fatores de risco / Bovine leptospirose in the State of the Brazil Bahia. Prevalence, sorovares predominant, space distribution and factors of risk

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The aim of this work was to determine the seroprevalence of bovine leptospirosis in Bahia State, Northeastern Brazil, as well as to identify risk factors associated to infection. The sampling was delineated for the determination of the prevalence of positive herds and seropositive animals for bovine leptospiroses. The State was divided into four productive circuits in which 10,823 bovine females aged ≥24 months allocated in 1,414 herds were sampled. On the occasion of the blood collection, an epidemiological questionnaire was applied in each herd and the geographical coordinates were obtained with a GPS. The Microscopic Agglutination Teste (MAT), using 24 Leptospira spp. serovars as antigens, was employed as diagnostic test. The herd was considered positive if at least one animal was seropositive. The prevalences of positive herds and seropositive animals in State were 77. 93% [75.73% 79.99%] and 45.42% [42.00% 48.88%], respectively. Serovar Hardjoprajitno was the most frequent, with 34.49% [31.93% 37.14%] of positive herds and 14.95% [12.59% - 17.67%] of seropositive animals. In the productive circuits 1, 2, 3 and 4, the prevalences of positive herds were 62.40% [57.43% 67.13%], 88.10% [84.16% 91.15%], 77.47% [72.88% 81.49%] and 78.25% [73.47% 82.37%], and the revalences of seropositive animals were 42.52% [35.82% 49.51%], 48.60% [43.68% 53.56%], 47.72% [40.36% 55.18%] and 44.18% [38.13% 50.41%], respectively. Purchase of reproducers, presence of wild animals, utilization of shared pasturage, presence of equine, dogs and swine, presence of cervides, slaughter of reproducers in the farms, existence of flooded areas, meat farm enterprise, rent of pasturage and predominance of specialized breeds were the main identified risk factors. Presence of cats was a protective factor against leptospirosis.

ASSUNTO(S)

prevalence prevalência leptospirose bovine (females) bovinos (fêmeas) leptospirosis

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