Ruminococcus gnavus

**Semantic type:** Bacterium

**Definition:** A species of anaerobic, Gram-positive gut microbes in the class Clostridia. R. gnavus is described as a normal part of the human gut flora, but can form opportunistic infections. The species is catalase negative, and growth is inhibited by metronidazole, bile, and vancomycin but not by kanamycin or colistin.

**Synonyms:** - RUMINOCOCCUS GNAVUS