Carbapenem resistance in enterotoxigenic Bacteroides fragilis isolated from colonoscopy candidates.

Overall, 71.64%, 33.83%, and 20.4% of patients were positive for B. fragilis group, B. fragilis, and Enterotoxigenic Bacteroides fragilis, respectively.

28 (68.3%) tested positive for the bft-1 gene, whereas only one isolate (2.4%) contained the bft-3 gene.

80% (n = 4/5) of patients with polyp in sigmoid colon + colorectal polyp and 72.7% (n = 8/11) of patients with hemorrhoids were positive to Enterotoxigenic Bacteroides fragilis.

Out of the 41 Enterotoxigenic Bacteroides fragilis isolates, 28 (68.3%) were positive for carbapenemase production.