alistipes ihumii alistipes ihumii alistipes ihumii is a gram-negative, non-spore-forming, anaerobic and non-motile bacterium from the genus of alistipes which has been isolated from human feces. alistipes ihumii scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: rikenellaceae genus: alistipes species: a. ihumii binomial name alistipes ihumiipfleiderer et al. 2017 type strain csur p204, dsm 26107 synonyms candidatus alistipes marseilloanorexicus