Listeria riparia
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
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Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Listeriaceae, Genus Listeria, Listeria riparia Den Bakker et al. 2014.
Gram-positive, straight rods with rounded ends, 0.5-0.7 x 2.3-3.7 µm. Non-motile at
4, 22, 30 or 37 ºC.
Colonies resemble typical Listeria colonies morphology. Optimum growth
temperature is 37-41 ºC. Hemolysis is not produced. CAMP-negative. Aerobic and
facultative anaerobic. Grows well on BHI agar.
Isolated from running water in Florida, USA.
Undetermined.
  1. Den Bakker, H. C., Warchocki, S., Wright, E. M., Allred, A. F., Ahlstrom, C., Manuel, C. S., Stasiewicz, M. J., Burrell, A., Roof, S.,
    Strawn, L. K., Fortes, E., Nightingale, K. K., Kephart, D. and Wiedmann, M. 2014. Listeria floridensis sp. nov., Listeria aquatica sp.
    nov., Listeria cornellensis sp. nov., Listeria riparia sp. nov. and Listeria grandensis sp. nov., from agricultural and natural
    environments. Int. J. Syst. Evol. Microbiol., 64, 1882-1889.
Some characters were determined using API Listeria (numerical profile 6710) and
API 50 CHB/E kits.

Positive results for catalase, methyl red test, nitrate reduction (no nitrite reduction), alpha-mannosidase, acid production from:
aesculin ferric citrate, N-acetylglucosamine, amygdalin, arbutin, L-arabinose, cellobiose, D-fructose, D-galactose, methyl
alpha-D-glucoside, D-glucose, lactose, maltose, D-mannose, L-rhamnose, salicin  D-xylose

Negative results for arylamidase, Voges-Proskauer test, acid production from: D-arabinose, D-arabitol, D-adonitol, L-fucose,
glycogen, glucose 1-phosphate, gluconate, 2- and 5-ketogluconate, inulin, D-lyxose, melezitose, methyl alpha-D-mannopyranoside,
raffinose, L-sorbose, sucrose, D-tagatose, turanose & methyl beta-D-xylopyranoside.

Variable results for acid production from glycerol, inositol, D-mannitol, melibiose & D-ribose.
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