Lactobacillus namurensis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, Lactobacillus namurensis
Scheirlinck, Van der Meulen, Van Schoor, Cleenwerck, Huys, Vandamme, De Vuyst and Vancanneyt 2005.
Gram-positive rods, 0.5-1.0/2.0-10 µm,  occuring singly or in pairs. Nonmotile.
Nonspore-forming.
Colonies are beige, circular with an irregular surface, and 0.5-1 mm in diameter on
MRS5 agar, after 2 days of incubation. Aerobic and anaerobic growth. Can grow at
10-40 ºC, but not at 45 ºC. Can grow in 1-6% NaCl (variable growth in 7% NaCl).
Grows at pH pH 3-10.
Isolated from an artisanal sourdough manufactured with wheat, rye and spelt flour in the province of Namur, Belgium.
Undetermined.
  1. Scheirlinck I., Van der Meulen R., Van Schoor A., Cleenwerck I., Huys G., Vandamme P., De Vuyst L. and Vancanneyt M., 2005.
    Lactobacillus namurensis sp. nov., isolated from a traditional Belgian sourdough. IJSEM 57, 223-227.
  2. Guu JR, Wang LT, Hamada M, Wang C, Lin RW, Huang L and Watanabe K, 2018. Lactobacillus bambusae sp. nov., isolated from
    traditional fermented ma bamboo shoots in Taiwan. Int J Syst Evol Microbiol 68, 2424-2430.
Both D- and L-lactate are produced in equimolar amounts and glucose is metabolized heterofermentatively.

Positive results for arginine hydrolysis, acid phosphatase, alkaline phosphatase, alpha-chymotrypsin, cystine arylamidas, esterase
C4, esterase lipase C8, esculin hydrolysis, alpha- and  beta-galactosidase, alpha- and  beta-glucosidase, leucine arylamidase,
valine arylamidase, Voges-Proskauer fermentation of: aesculin, fructose, galactose, glucose (acid & gas), maltose, and methyl
alpha-D-xylopyranoside.

Negative results for catalase, alpha-fucosidase, gelatin hydrolysis, beta-glucuronidase, N-acetyl-beta-glucosaminidase, H2S
production, indole production, lipase C14, alpha-mannosidas, trypsin, urease, fermentation of: adonitol, amygdalin, arbutin, L- or
D-arabinose, L- or D-arabitol, cellobiose, dulcitol, erythritol, D,L-fucose, gentiobiose, glycerol, glycogen, inositol, inulin, 2- or
5-ketogluconate, lactose, lyxose, mannose, melezitose, raffinose, rhamnose, salicin, sorbitol, sorbose, starch, sucrose, tagatose,
trehalose, turanose, xylose, and methyl alpha-D-glucopyranoside.

Variable results for N-acetylglucosamine, gluconate (with gas production), mannitol, melibiose, and ribose
(c) Costin Stoica
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