alistipes onderdonkii alistipes onderdonkii alistipes onderdonkii is a gram-negative, rod-shaped and anaerobic bacterium from the genus of alistipes which has been isolated from a human abdominal abscess in the united states. alistipes onderdonkii scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: rikenellaceae genus: alistipes species: a. onderdonkii binomial name alistipes onderdonkiisong et al. 2006 type strain atcc baa-1178, ccug 48946, dsm 19147, jcm 16771, wal 8169