| pestiviral infections in sheep and pigs in northern ireland. | serological surveys were carried out to determine the prevalence of pestiviral infections in sheep and pigs in northern ireland. sera from 918 ewes in 92 flocks from 10 regions were tested by elisa for antibodies to border disease virus and positive results were obtained from 49 ewes (5.3 per cent) in 28 flocks (30.4 per cent). there were highly significant geographical variations in its flock prevalence ranging from 0 per cent in the enniskillen region to 70 per cent in the coleraine region. th ... | 2001 | 12503593 |