ileibacterium massiliense ileibacterium massiliense ileibacterium massiliense is a bacterium from the genus of ileibacterium which has been isolated from the ileum of a human. ileibacteriummassiliense scientific classification domain: bacteria phylum: bacillota class: erysipelotrichia order: erysipelotrichales family: erysipelotrichaceae genus: ileibacterium species: i. massiliense binomial name ileibacterium massiliensemailhe et al. 2017 type strain csur p3115, dsm 103486, marseille-p3115