oribacterium oribacterium oribacterium is a strictly anaerobic and non-spore-forming bacterial genus from the family of lachnospiraceae. oribacterium scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: oribacteriumcarlier et al. 2004 type species oribacterium sinus species o. asaccharolyticum o. parvum o. sinus