1982 Volume 35 Issue 6 Pages 340-343
Over a 5-month period beginning with December, 1979, 17 calves were born on two farms to suffer from yellowish watery diarrhea. Of them, fifteen (88.2%) died in 1-3 days. Autopsy revealed no marked changes. Histologically, the small intestine was affected with catarrhal enteritis.
Colibacilli were isolated in a pure form from the brain and other organs. All of them showed a serotype of O101: H-, produced thermostabile enterotoxin, and possessed an immobilized factor, K99 ciliary antigen. Sensitivity was noticed to chloramphenicol, colistin, and oleandomycin. Virological examination gave negative results.