Serologic Studies of Myxovirus Para-Influenza 3 in Cattle and the Prevalence of Antibodies in Bovines

[摘要] The relative sensitivities of the hemagglutination inhibition (HI), neutralization (N) and complement fixation (CF) tests to detect parainfluenza 3 antibodies in bovine sera were compared. The HI and N tests were essentially similar in sensitivity; the CF test was less sensitive but appeared to be useful in detecting recent infections. The temporal appearance and persistence of each type of antibody was studied.A serologic survey of market cattle bled at slaughter showed that at least 70% had parainfluenza 3 antibodies and that infection had a wide geographic distribution. The data suggest that greater numbers of new infections occur during the fall than during other periods of the year.

[学科分类] 生物科学（综合）