Prevalence of bovines persistently infected with bovine viral diarrhea virus (BVDV) in dairy cattle herds in Paraná State, Brazil

ABSTRACT: This study aimed to establish the prevalence of animals persistently infected (PI) with bovine viral diarrhea virus (BVDV) in dairy farms at Parana State, Brazil. Samples were collected from 6,465 female Holstein Friesian Dairy Cattle, including less than two years old, females over old who had not given birth farm, and mothers calves diagnosed as infected. The cattle came 40 herds distributed 10 municipalities State Paraná. samples obtained May 2015 August 2018. diagnosis PI was made an antigen-capture ELISA test. We detected fifteen sampled (37.5%), ranging one sixteen per herd. State’s 1.78%, 0.3 8.9% positive herds. analysis individual shows significant dissemination BVDV Parana’s municipalities, endemic areas. With this, we highlight need for measures raise awareness among producers about existence importance (BVD) herds, reinforcing animals’ role disease epidemiology economic impact caused by maintenance these farm animals.