Читать книгу Farm Animal Medicine and Surgery - Graham R Duncanson - Страница 193

This virus will cause abortion after 150 days post service. There is venereal spread of a strain of virus which appears to be different from the virus that causes respiratory signs. Animals which have aborted are then immune. There is a vaccine, which is not licensed in the UK, which should be given to heifers before service when at risk from the disease.