title: Seroprevalence of bovine immunodeficiency virus and bovine leukemia virus in dairy and beef cattle in hokkaido.
abstract: Serological survey of bovine immunodeficiency virus (BIV) and bovine leukemia virus (BLV) infection was conducted in dairy cattle from 10 different regions of Hokkaido, Japan. Among 390 cattle, 11.0% of cattle were BIV-seropositive and 3.3% were BLV-seropositive. Moreover, in two dairy farms, where bovine leukosis has been reported, prevalence of BIV infections were 6.4 and 9.1%, respectively. In contrast, among 150 beef cattle, 16.6% were BIV-seropositive while none was BLV-seropositive. Dual infections with BLV and BIV in dairy cattle were tested by using 107 BLV-seropositive sera, and 20 sera were found BIV-positive (18.7%). These results indicate that BIV infection was widespread in Hokkaido.
authors.affiliation: Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Tatsufumi
authors.initials: T
authors.lastname: Usui
authors.forename: Sothy
authors.initials: S
authors.lastname: Meas
authors.forename: Satoru
authors.initials: S
authors.lastname: Konnai
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ohashi
authors.forename: Misao
authors.initials: M
authors.lastname: Onuma
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D002417:Cattle; D003612:Dairying; D016583:Enzootic Bovine Leukosis / Q000453:epidemiology* / Q000276:immunology / Q000821:virology; D005260:Female; D016087:Immunodeficiency Virus, Bovine / Q000276:immunology* / Q000302:isolation & purification*; D007564:Japan; D016180:Lentivirus Infections / Q000453:epidemiology* / Q000276:immunology / Q000662:veterinary*; D001909:Leukemia Virus, Bovine / Q000276:immunology* / Q000302:isolation & purification*; D008297:Male; D008460:Meat; D016036:Seroepidemiologic Studies
chemical_list: D000914:Antibodies, Viral