Ultrastructural Lesions of Enterotoxigenic Bacteroides fragilis in Rabbits

In previou s studies, enterotox igenic isolates of the obligate an aerobic bacterium Bacteroides fragi lis have been found in the feces of 10 to 20% of diarrheic livestock an d hu man beings.6•7•1O•1J Isolates were considere d enterotoxigenic if viable bacteria or concen tra ted bacteria-free broth filtrat es caused acc umulation of fluid in the lamb ligated intestina l loo p test. 7. 10 Enterotoxigenic isolates of B. jragilis caused enteric disease when ad mi nistered orally to gnotobio tic pigs-