| epidemiological survey of border disease virus among sheep from northern districts of japan. | the first epidemiological survey of border disease virus (bdv) was undertaken in small ruminants in japan. ovine sera, collected from the northern prefectures of hokkaido, aomori and iwate, were examined for the presence of antibodies against bdv using the neutralization peroxidase-linked antibody test. twenty-nine (17.6%) of one hundred and sixty-five samples were seropositive for bdv. results were specific, excluding cross-reactions with bovine viral diarrhea virus (bvdv). only one sample (0.6 ... | 2011 | 21778667 |