<unk>  is an anaerobic, non-motile, gram-positive bacterium that reproduces by sporulation. While there are over 130 species of<unk> , C.<unk>  is the third most commonly isolated. Although it is not normally considered an aggressive human pathogen, it has been isolated in some disease processes. C.<unk>  and other<unk>  line the oropharynx and gastrointestinal tract, and are considered normal gut flora.
Clostridium innocuum
Clostridium tetani
Clostridium ramosum
Clostridium perfringens
Bacillus cereus
Corynebacterium pseudotuberculosis
Bacteroides caccae
Clostridium botulinum