parabacteroides merdae parabacteroides merdae parabacteroides merdae is a gram-negative, non-sporeforming, obligately anaerobic, rod-shaped, and non-motile bacterium from the genus of parabacteroides which has been isolated from human faeces in the united states. parabacteroides merdae scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: "tannerellaceae" genus: parabacteroides species: p. merdae binomial name parabacteroides merdae(johnson et al. 1986) sakamoto and benno 2006 type strain atcc 43184, ccug 38734, cip 104202, dsm 19495, jcm 9497, moore vpi t4-1, nctc 13052, vpi t4-1, vtt e-062953 synonyms parabacteroides merdae