NCIt definition : A species of facultatively anaerobic, Gram positive, rod shaped bacteria in the phylum
Firmicutes. This species is motile by peritrichous flagella, asporogenous, catalase
positive, oxidase negative, unable to reduce nitrates to nitrites, hydrolyzes esculin
and produces acid from D glucose, D xylose and alpha methyl D mannoside. L. welshimeri
is found in soil and is regarded as nonpathogenic.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Listeria welshimeri.;