Distribution of economically important viral diseases in cattle

Extending previous studies the current situation of livestock infectious diseases e.g. parainfluenza 3 virus (PI-3), respiratory sincytial virus (RSV), infectious bovine rhinotracheitis (IBR) and bovine viral diarrhea virus (BVDV) were serologically monitored in 19 randomly selected pedegree cattle farms in Lithuania. From 2006 to 2007 PI-3 and BVBV (n=558), RV and IBR (n=538) using antibody ELISA were tested. In the majority of serologically investigated farms antibodies for mixed infections of PI-3, BVDV, RV and IBR were detected, and only in five farms antibodies for mixed infections of two or three monitored diseases were diagnosed. PI-3 and RSV were most frequently detected in investidated farms (95%). The mean serological prevalence of IBR and BVDV in investigated farms was 84,2% and 85%. However, among individual animals in tested farms 72,2%, 54,5%, 43,4% and 3 0,5% were seropositive to PI-3, RSV, BVDV and IBR, respectively. This antibody ELISA test implies that mixed PI-3, BVDV, RSV and IBR livestock virus infectious diseases are frequent in pedegree cattle farms in Lithuania. Moreover, these findings suggest that mean of individual animals in investigated farms are variable, but may be a potential reservuar for virus transmission.