Serological investigation of infectious bovine rhinotracheitis (IBR) ve bovine viral diarrhoea (BVD) infections in newborn calves and their mothers

In this study, to investigate the incidence of Bovine Viral Diarrhoea Virus (BVDV) and Bovine Herpesvirus type 1 (BHV1) infections in Afyonkarahisar province was aimed. Total of 162 cows and their calves in precolostral period were sampled, the number of sampled cows from three organised herd was 155 and 7 cows was used from family type small enterprises. Total of 324 sera were controlled using Virus Neutralization Test.BVDV specific antibody proportion was determined among 77.7% and 100.0% in cattle organised herd, and 57.1% value detected in family type farms. The all calves were found to be negative in herd one, in other organised herds 10% (3/30) and 14.6% (17/116) proportions were determined. The highest rate in calves was observed in family type farms as 28.5%. In total out of 162 cows 155 (95.6%) and 22 calves (13.5%) were found to be seropositive for BVDV.BHV1 antibody proportions in cows were detected as 69.7% (113/162) in cows while only a calf was seropositive in herd 3. In three organisated herd, seropositivity values in cows were between 66.6% (6/9) and 73.3% (22/30), however, in family type farms, this rate was determined 42.8% (3/7).In this study, it was concluded that, all of the obtained values were result of natural infection. Out of 162 sampled calves, 22 and 1 precolostral calves were detected as antibody positive for BVDV and BHV1, respectively. It is obvious that foetuses were infected after gaining the immune competence and both studied viruses were in the circulation in most of the herds.