eggerthia catenaformis eggerthia catenaformis eggerthia catenaformis is an anaerobic, gram-positive, non-spore-forming rod-shaped bacterium. it is an uncommon cause of infection in humans and is known to be associated with dental abscess. eggerthia catenaformis scientific classification domain: bacteria phylum: bacillota class: erysipelotrichi order: erysipelotrichales family: coprobacillaceae genus: eggerthia species: e. catenaformis binomial name eggerthia catenaformis(eggerth 1935) salvetti et al. 2011 type strain atcc 25536, ccug 48174 synonyms bacteroides catenaformis,catenabacterium catenaforme