Читать книгу Farm Animal Medicine and Surgery - Graham R Duncanson - Страница 194

BVDV may cause infertility problems related to early embryonic death, but abortion is rare. The virus will cause diarrhoea in adult cows and mucosal disease in calves infected in utero (these calves are PI). Infected cows will test serologically positive but virus negative, unlike the PI calves. There are very effective vaccines available.