Bacteroides fragilis are the most common human anaerobic pathogens.
BFT has two major types of biologic activities identified to date. First, BFT stimulates chloride secretion as well as swelling of intestinal epithelial cells. Second, BFT rapidly causes actin rearrangement in intestinal epithelial cells. Enterotoxigenic Bacteroides fragilis. Mechanisms of Action and Linkage to Intestinal Secretion.