| vertical transmission of bovine leukemia virus and bovine immunodeficiency virus in dairy cattle herds. | vertical transmission of bovine leukemia virus (blv) and bovine immunodeficiency virus (biv) was investigated in five dairy cattle herds in hokkaido, where 36.1 and 17.0% of cattle were blv and biv seropositive, respectively, and 9.9% of dams were co-infected with both biv and blv. twenty six cases of offspring born from dams infected with only blv (17 cases) or with both biv and blv (9 cases) were examined for the presence of blv and biv before and after colostrum feeding by polymerase chain re ... | 2002 | 11731179 |
| prevalence and risk factor analysis of bovine hemoplasma infection by direct pcr in eastern hokkaido, japan. | the prevalence and risk factors of 2 bovine hemoplasma species-mycoplasma wenyonii (mw) and "candidatus mycoplasma haemobos" (cmh)-were examined by direct pcr using whole blood samples collected from 343 cattle in eastern hokkaido, japan. the sensitivity of the direct pcr assay was 10-fold higher than the standard pcr assay, detecting 5 copies of bovine hemoplasma dna per reaction. an epidemiological survey of sampling location, living conditions, age and bovine leukemia virus antibody was perfo ... | 2012 | 22673725 |
| seroprevalence of bovine immunodeficiency virus and bovine leukemia virus in dairy and beef cattle in hokkaido. | 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 i ... | 2003 | 12655131 |
| detection of antibodies against bovine immunodeficiency-like virus in daily cattle in hokkaido. | serological survey of bovine immunodeficiency-like virus (biv) infection was performed in cattle of 3 different farms in hokkaido, where a relatively high seroprevalence was recorded for bovine leukemia virus (blv). about a half of 120 cattle tested were seropositive for blv, while 7.5% of the cattle were seropositive for biv. though increased numbers of leukocytes were frequently observed in blv-seropositive cows, no such changes were observed in biv-positive but blv-negative cows. no correlati ... | 1996 | 8741608 |