ARAF and colonic neoplasm: Comparison of the prevalence or abundance of Morganella in primary gastrointestinal (GI) tumors compared to non-GI tumors identified increased levels of this genus in adenocarcinomas of the colon, rectum and stomach.6 Abnormal colonization of colonic adenomas, carcinomas and mucosa of patients with colon cancer is also a feature of adherent E. coli and pks+ strains.36,81–83