| Listeria portnoyi |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Bacillales, Family Listeriaceae, Genus Listeria, Listeria portnoyi Carlin et al. 2021.
Synonym: Paenilisteria portnoyi (Carlin et al. 2021) Bouznada et al. 2024.
Synonym: Paenilisteria portnoyi (Carlin et al. 2021) Bouznada et al. 2024.
Gram-positive, short rods. Non-motile at 25 and 37 ºC.
Colonies on MOX are small, round, black, with sunken centres after 48h incubation at
35 ºC. Colonies on LMCPM are small, round, convex and white following incubation at
35 ºC for 48h. Growth occurs between 4 and 37 ºC in BHI broth with optimal growth at
30 ºC after 24h. Facultative anaerobe.
35 ºC. Colonies on LMCPM are small, round, convex and white following incubation at
35 ºC for 48h. Growth occurs between 4 and 37 ºC in BHI broth with optimal growth at
30 ºC after 24h. Facultative anaerobe.
Isolated from soil in USA.
Presumed to be nonpathogenic based on the absence of haemolysis on SBA, lack of PI-PLC activity on LMCPM, and the absence of
six virulence genes (prfA, plcA, hly, mpl, actA and plcB) located on LIPI-1 as well as the absence inlA and inlB.
six virulence genes (prfA, plcA, hly, mpl, actA and plcB) located on LIPI-1 as well as the absence inlA and inlB.
- Carlin CR, Liao J, Weller D, Guo X, Orsi R, Wiedmann M. Listeria cossartiae sp. nov., Listeria immobilis sp. nov., Listeria portnoyi
sp. nov. and Listeria rustica sp. nov., isolated from agricultural water and natural environments. Int J Syst Evol Microbiol 2021; 71:
4795.
Positive results for catalase, esculin hydrolysis, nitrate reduction, acid production from: D-arabitol (weak), amygladin, arbutin,
D-fructose, D-cellobiose, D-galactose, D-glucose, gentibiose, N-acetylglucosamine, lactose (weak), D-mannitol, D-mannose, methyl
alpha-D-glucopyranoside, L-rhamnose, salicin, D-trehalose and D-xylose.
Negative results for arylamidase, alpha-mannosidase, nitrite reduction, oxidase, Voges-Proskauer test, acid production from: D- and
L-arabinose, D-adonitol, L-arabitol, dulcitol, erythritol, D- and L-fucose, glucose-1-phosphate, glycerol, glycogen, gluconate, 2- and
5-ketoguconate, inositol, inulin, D-lyxose, maltose, melibiose, melezitose, methyl alpha-D-mannopyranoside, methyl
alpha-D-xylopyranoside, D-rafinose, D-ribose, D-sorbitol, sucrose, L-sorbose, starch, turanose, D-tagatose, xylitol and L-xylose.
D-fructose, D-cellobiose, D-galactose, D-glucose, gentibiose, N-acetylglucosamine, lactose (weak), D-mannitol, D-mannose, methyl
alpha-D-glucopyranoside, L-rhamnose, salicin, D-trehalose and D-xylose.
Negative results for arylamidase, alpha-mannosidase, nitrite reduction, oxidase, Voges-Proskauer test, acid production from: D- and
L-arabinose, D-adonitol, L-arabitol, dulcitol, erythritol, D- and L-fucose, glucose-1-phosphate, glycerol, glycogen, gluconate, 2- and
5-ketoguconate, inositol, inulin, D-lyxose, maltose, melibiose, melezitose, methyl alpha-D-mannopyranoside, methyl
alpha-D-xylopyranoside, D-rafinose, D-ribose, D-sorbitol, sucrose, L-sorbose, starch, turanose, D-tagatose, xylitol and L-xylose.
(c) Costin Stoica
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