Spatial characterization of bovine brucellosis in Tocantins State, Brazil / Caracterização espacial da brucelose bovina no Estado do Tocantins

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

In order to support the implementation of PNCEBT in Tocantins State, a study was conducted to characterize the epidemiological situation of the disease from February 2002 to august 2003. The State was divided into six areas with a homogeneous productive system (production circuits). For each area, a simple random sample was calculated, to estimate the prevalence both in farms and cows over two years old. To achieve this, 10 15 adult cows (over two years old) were sampled. A total of 20,908 sera from 1,842 farms were obtained. For the whole State of Tocantins, the prevalence of positive farms (or farms with at least one positive animal) was 21.22% [19.33;23.11]. When the production circuits were considered, the positive farms prevalences from the circuits 1, 2, 3 and 5 were significantly higher than the other circuits: 16.01% [12.08;20.61], 37.63% [32.08;43.43], 26.38% [21.54;31.69] and 29.26% [24.26;34.66], respectively. In the circuits 4 and 6, the prevalences were 5.84% [3.50-9.08] and 8.57% [5.72;12.23], respectively. In each visited farm, a questionnaire was applied, in order to evaluate the association with possible risk factors and the brucellosis. The results of risk factors analysis were: herds of cows >24 months above 120 animals (OR=2.00); vaccinate against brucellosis or vaccinate cows above 8 months (OR=0.37); presence of birth paddock (OR=0.72); Milk exploitation (OR=0.63) and slaughter of breeding animals in farm (OR=1,52).

ASSUNTO(S)

prevalência bovines brucellosis brucelose animal tocantins bovinos prevalence fator de risco tocantins risk factor

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