Abstract
Two calves were born normally in January and February, 1980, respectively. They showed ataxia, obvious cerebellar hypoplasia, and a high postcolostrous titer of bovine viral diarrhea-mucosal disease (BVD-MD) virus neutralizing antibody. Fetal infection was confirmed in a clinically healthy calf born at the same time with one of them.
A survey revealed that the positive rate of BVD-MD virus infiltration was relatively high among cattle grazed on pasture.
