Fatores de risco para infecção por Brucella abortus em bovinos e bubalinos de três municípios da Amazônia Maranhense

Abstract

Brucellosis is an important zoonosis, caused by the bacterium brucella abortus, widespread in the world that affects cattle and buffaloes, causing serious economic losses due to reproductive disorders and reduced meat and milk production. Risk factors for the disease vary with the region and are related to the movement of animals and inadequate handling. A cross-sectional state was performed to analyze factors associated with brucellosis in three municipalities in the state of Maranhão, Brazil, using a logistic regression model followed and ROC curve analysis. Blood was collected from farms and slaughterhouses in the region. For serological diagnosis, a buffered acidified Antigen test was used. The results show that 5.1% of the animals and 31.25% of the herds were infected with Brucella Abortus. The risk factors associated with brucellosis were: acquisition of animals (RC = 3.3); history of abortion (RC = 3.1) and herd size greater than 60 heads (RC = 3.0). The final model showed a good fit (area under curve = 0.731, CI 0.627 -0.834) in the forecast of cases of bovine brucellosis in the population