Abstract
Extract
Little published data is available on the distribution and prevalence of viral diseases in the New Zealand cattle population. Infectious bovine rhinotracheitis (IBR) virusCitation(4) Citation(5) Citation(7) and bovine virus diarrhoea (BVD) virus Citation(5) Citation(7) Citation(l0) appear on serological grounds to be widespread. A serological survey by Fastier and Hansen Citation(7) also suggests that parainfluenza type 3 (PI3) virus is common in the North Island.