serological study of bovine viral respiratory diseases in dairy herds in kerman province, iran

respiratory disorders are major concern for dairy cattle industry. viruses and bacteria in combinationwith stress play a key role in triggering acute respiratory infections. the most important viral agents arebovine viral diarrhoea virus (bvdv), bovine herpes virus type 1 (bhv-1), bovine respiratory syncytial virus(brsv), parainfluenza virus type 3 (piv-3) and bovine adenovirus (bav). this cross-sectional study wasconducted to evaluate the serological status of bvdv, bhv-1, brsv, piv-3 and bav in dairy herds inkerman province, iran. from june to november 2007, 181 serum samples were collected from 1–3-year-oldcattle from 15 industrial dairy farms in kerman province using cluster sampling. the samples were tested bycommercial indirect elisa kits. antibodies were detected against bvdv, bhv-1, brsv, piv-3 and bavin 77.90, 30.39, 100, 100 and 100% of serum samples, respectively. all farms were positive at least for oneof these viruses and antibodies against all the 5 viruses were detected in 4 (26.66%) herds among 15 dairyfarms. according to the present study, bvdv, brsv, piv-3 and bav are common viruses in dairy herds inkerman province.