1979 Volume 41 Issue 6 Pages 601-605
A seroepizootiological survey was performed on antibodies against bovineleukemia virus (BLV) in beef cattle in the Hida district by using the immunodiffusion testwith BLV glycoprotein antigens. These cattle were maintained in two different herd styles.In one style, cattle from various herds were placed together on the same pasture duringsummer. In the other, cattle were kept in their own herds throughout the year. Morethan one-half (52.17) of the former cattle was positive for BLV antibodies, but only 8.1%of the latter cattle was positive. Reactors increased gradually in number with the advancein age. Eighty-eight percent of the animals which had shown lymphocytosis in the hematological test was positive for BLV antibodies, whereas 38.3% of the animals free fromlymphocytosis was also positive. These results indicated that there was a relationshipbetween BLV infection and the incidence of lymphocytosis.
