| a serologic epidemiological study of parainfluenza 1, 2, and 3 viruses in beef cattle and calves in illinois. | beef cattle and calves in four illinois populations were studied. serum was tested by the hemagglutination-inhibition (hi) test for antibodies to parainfluenza viruses (piv) 1, 2, and 3. in all but group 3 a low level of antibody to piv-1 and 2 was demonstrated. the highest prevalence and incidence of hi-antibodies was found for piv-3, followed by piv-1. there may have been a cross-reaction between piv-1 and -3 in group 1 calves. the low level of hi antibodies to piv-1 and 2 may have resulted fr ... | 1985 | 2986256 |