Risk factors associated with the occurrence of antibodies against bluetongue virus in sheep in the state of Paraná, Brazil

Bluetongue is an arbovirus that affects different animal species, being most relevant in sheep because of the possible disease severity. This study aimed to evaluate occurrence antibodies against bluetongue virus (BTV) central-western region Paraná, Brazil, and risk factors for infection species. first determine these southern Brazil. A serological survey using agar gel immunodiffusion was positive 28.1% (108/350) animals tested, 91.66% (11/12) farms analyzed had at least one seropositive animal. Furthermore, contact between cattle determined as main factor BTV sheep, followed by flooding, a history abortion, with rivers riparian forests. In conclusion, anti-BTV flocks Paraná moderate however, still circulating animals, so greater epidemiological surveillance implementation programs control are necessary.