alistipes shahii alistipes shahii alistipes shahii is a gram-negative, strictly anaerobic and rod-shaped bacterium from the genus of alistipes which has been isolated from human appendix tissue from the united states. alistipes shahii scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: rikenellaceae genus: alistipes species: a. shahii binomial name alistipes shahii(song et al. 2006) hahnke et al. 2016 type strain atcc baa-1179, ccug 48947, dsm 19121, jcm 16773, wal 8301