EN
The presence of antibodies against IBR/IPV (BHV-1), BVD-MD and PI-3 was serologically examined in sera of cows and heifers after abortion. It was found that the greater number of animals have antibodies against PI-3 (40.4%). Antibodies against IBR/IPV were found in 26.8% and against BVD-MD in 19.6% of animals. The obtained results suggest that infections caused by these viruses are the risk factors in cows as causes of disturbances in reproduction.