Prevalence of the plasma bovine leukaemia virus blocking factor in cattle from a commercial dairy herd.
The prevalence of the plasma bovine leukaemia virus blocking factor was examined in a commercial herd. The detection of the blocking factor activity depended on the nature of the infected target cells used in the assay. Using the sensitive bovine leukaemia virus-infected target lymphocytes, the factor was found to be significantly more prevalent in infected cattle than in virus-free cattle. Furthermore, in infected cattle, no correlation was observed between the level of bovine leukaemia virus antibody and the presence of the blocking factor.
Gupta
P
P
Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania 15261.
Chatterjee
R
R
Cai
Q
Q
D000818:Animals; D001798:Blood Proteins / Q000032:analysis* / Q000502:physiology; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood* / Q000382:microbiology; D002478:Cells, Cultured; D007938:Leukemia / Q000097:blood / Q000382:microbiology / Q000662:veterinary*; D001909:Leukemia Virus, Bovine / Q000378:metabolism*; D008214:Lymphocytes / Q000382:microbiology; D012190:Retroviridae / Q000378:metabolism*; D012191:Retroviridae Proteins / Q000096:biosynthesis
D001798:Blood Proteins; D012191:Retroviridae Proteins