2002 Volume 55 Issue 4 Pages 240-243
In conjunction with other meat-inspection topics, investigations were made of the parasitic hepatitis and roundworm infection in 46, 071 pigs (90 100 days old) on three farms in the southern part of Hokkaido between November 1995 and December 1996. Rates of parasitic-hepatitis emergence differed greatly among the three farms. In addition, changes occurred from week to week, but weekly changes on one farm failed to coincide with those occurring on either of the other two. Correlation was observed between rates of parasitichepatitis emergence and infection with pig roundworms. There was no correlation, however, between parasitic-hepatitis emergence rate and numbers of roundworms or white liver spots. A pig roundworm body width of more than 4 mm indicated female sexual maturation and is considered effective as a mean of discriminating roundworm sex.
