Genus Listeria Pirie 1940 |
Gram-positive short rods, nonspore-forming, noncapsulated, motile when cultured below 30 ºC; aerobe and facultative anaerobic, temperature limits of growth 0 to 45 ºC, acid produced from some carbohydrates (no gas from glucose), catalase positive, oxidase negative, methyl-red positive, Voges-Proskauer usually positive, indole and H2S are not produced, urea is not hydrolysed, organic growth factors are required. |
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Genus Brochothrix Sneath and Jones 1976 |
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Gram-positive rods, nonspore-forming, noncapsulated, nonmotile, aerobic & facultative anaerobic, temperature limits 0 to 30 ºC, acid produced from some carbohydrates (no gas from glucose), catalase positive, oxidase negative, methyl-red positive, indole not produced. |