Bovine Abnormal Birth in Okayama Prefecture from 1984 to 1985

Abstract

Over a 2-year period from January, 1984 to December, 1985, there were 46 bovine cases of abnormal births. Of these cases, 10 were abortion, 11 stillbirths, and 25 abnormal newborn calves with kyphosis, blindness, infirmity, hydrocephalia and cerebellar hypoplasia. All the calves had cerebellar encephalitis. Seven stillborn young had neutralizing antibody to Ibaraki virus, but not antibodies to Akabane virus or bovine viral diarrhea-mucosal disease virus.
It was suggest that these cases of abnormal births might have been caused by infection with Ibaraki virus or a virus which had the same antigen as this virus.