KnowraBacteroides fragilisLinked fromLinked fromThe 2 pages that link to Bacteroides fragilis, each with the reason it gives.All 2Broader topic 2BacteroidotaBroader topic: It illustrates how a common gut resident can act as a pathogen outside its usual niche.BacteroidesBroader topic: It is a leading Bacteroides species in human infections outside the intestine.