NCIt 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.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Megasphaera elsdenii.;