<unk>  is an anaerobic, non-motile, thin, spore-forming, gram-positive bacterium that is among the gut flora of humans.
Clostridium ramosum
Bacteroides caccae
Clostridium tetani
Clostridium innocuum
Staphylococcus saprophyticus
Neisseria flavescens
Bacillus cereus
Fusobacterium necrophorum