Megasphaera elsdenii

**Semantic type:** Bacterium

**Definition:** A species of anaerobic, Gram negative, cocci shaped bacteria in the phylum Firmicutes. This species is nonmotile, indole negative, produces acid from fructose, glucose and maltose, does not reduce nitrate and is catalase negative. M. elsdenii is a commensal organism of the intestinal tract and rarely has been shown to be an opportunistic pathogen in humans.

**Synonyms:** - MEGASPHAERA ELSDENII - Peptostreptococcus elsdenii - Peptostreptococcus elsdenii