NCIt definition : A species of facultatively anaerobic, Gram positive, rod shaped bacteria in the phylum
Firmicutes. This species is motile, catalase positive, oxidase and indole negative,
nitrate reduction variable, produces acid from glucose and mannitol and hydrolyzes
esculin. L. grayi is found in soil and animal feces and generally regarded as nonpathogenic,
although infection has been documented in immunocompromised patients.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Listeria grayi.;