Liver cirrhosis occurred collectively to 115 head (14%) of 750 hogs fed a ration prepared by the “N” Company and slaughtered at the abattoir in Omiya, Saitama Prefecture, over a period of January to May, 1969. When a total of 63, 387 hogs, exclusive of the 750 hogs, brought to the abattoir over the same period were examined comparatively, severe liver cirrhosis was found in 64 hogs (0.1%). The difference in rate of detection was significant (P<0.01). When severe cases were observed, the peak of occurrence was seen in March. The etiology of the liver cirrhosis encountered was presumed to consistin feed.
