Bacteroides: the good, the bad, and the nitty-gritty. Wexler HM(1). SUMMARY: Bacteroides species are significant clinical pathogens and are found in most anaerobic infections, with an associated mortality of more than 19%.Click to see full answer. Similarly, you may ask, what does Bacteroides cause? It is part of the normal microbiota of the human colon and is generally commensal, but can cause infection if displaced into the bloodstream or surrounding tissue following surgery, disease, or trauma. Bacteroides fragilis Class: Bacteroidia Order: Bacteroidales Family: Bacteroidaceae Genus: Bacteroides Additionally, how is Bacteroides fragilis transmitted? MODE OF TRANSMISSION: Infection results from displacement of Bacteroides spp. or closely related genera from normal mucosal location as a result of trauma such as animal/human bites, burns, cuts, or penetration of foreign objects, including those involved in surgery(1,4,6). Similarly, is Bacteroides positive or negative? Bacteroides is a genus of Gram-negative, obligate anaerobic bacteria. Bacteroides species are non endospore-forming bacilli, and may be either motile or nonmotile, depending on the species. The DNA base composition is 40–48% GC. Unusual in bacterial organisms, Bacteroides membranes contain sphingolipids.What is Bacteroides Uniformis?Bacteroides uniformis is a putative bacterial species associated with the degradation of the isoflavone genistein in human feces.