Serological Survey on Bovine Viral Diarrhea Virus Infection of Cattle in Industrial and Non-Industrial Farms of Hamadan area

Infection with bovine viral diarrhea virus (BVDV) is endemic in cattle populations in most part of the world. The high prevalence in combination with the negative effects on reproduction and the general health condition in affected herds result in significant economic losses to the cattle industry globally. ELISA is better suited test for BVD screening of large series of samples. In this study, serological investigation was performed to determine the prevalence of bovine viral diarrhea virus infection of cattle in Hamedan erea. Blood samples were taken from 399 cattle (237 from industrial and 162 from non-industrial farms) and sera were stored at -70°C. The sera were tested by enzyme linked immunoabsorbent assay (ELISA) for detection of anti-BVDV antibodies. The antibodies against BVDV were showed in 309 (77.4%) of tested cattle. A total of 182 (76.8%) and 127 (78.4%) sera of industrial and non-industrial farms were positive, respectively. Statistical analysis of data by chi-square did not show any significant differences between age groups and also between the methods of husbandry.