ileibacterium ileibacterium ileibacterium is a genus from the family of erysipelotrichidae. ileibacterium scientific classification domain: bacteria phylum: bacillota class: erysipelotrichia order: erysipelotrichales family: erysipelotrichaceae genus: ileibacteriumcox et al. 2017 type species ileibacterium valens species i. valens i. massiliense