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.