| Pseudomonas cremoris |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae,
Genus Pseudomonas, Pseudomonas cremoris Hofmann et al. 2021.
Genus Pseudomonas, Pseudomonas cremoris Hofmann et al. 2021.
Gram-negative rods, 0.6-1.1 x 1.7-3.7 µm. Motile. Non-spore-forming.
Colonies are 1.0-1.5mm in diameter, round, glossy and beige after incubation at 28
ºC for 48h on TSA. Grows at temperature of 4-34 ºC (optimum 27-29 ºC), at pH values
of 6.0-8.0 and in the presence of 0-5.5% (w/v) NaCl. Does not produce pigments on
King A agar. Production of a fluorescent pigment on King B agar is variable.
Beta-haemolysis on Columbia agar with 5% sheep blood is negative. Aerobic.
ºC for 48h on TSA. Grows at temperature of 4-34 ºC (optimum 27-29 ºC), at pH values
of 6.0-8.0 and in the presence of 0-5.5% (w/v) NaCl. Does not produce pigments on
King A agar. Production of a fluorescent pigment on King B agar is variable.
Beta-haemolysis on Columbia agar with 5% sheep blood is negative. Aerobic.
Isolated from cream and skimmed milk concentrate.
Undetermined. Species might have a high potential for spoilage of milk and milk products.
- Hofmann K, Woller A, Huptas C, Wenning M, Scherer S, Doll EV. Pseudomonas cremoris sp. nov., a novel proteolytic species
isolated from cream. Int J Syst Evol Microbiol 2021; 71:4597. - BacDive in 2025: the core database for prokaryotic strain data. Isabel Schober, Julia Koblitz, Joaquim Sardà Carbasse, Christian
Ebeling, Marvin Leon Schmidt, Adam Podstawka, Rohit Gupta, Vinodh Ilangovan, Javad Chamanara, Jörg Overmann, Lorenz
Christian Reimer. Nucleic Acids Research; database issue 2025.
Positive results for arginine dihydrolase, catalase, aesculin hydrolysis, gelatin hydrolysis, oxidase, proteolysis on skimmed milk agar
(casein hydrolysis) and lipolysis on tributyrin agar at both 6 and 28 ºC, Voges-Proskauer reaction, acid production from: D-arabitol,
cellobiose, D-fructose, D-fucose, D-galactose, D-glucose (negative in API 20 NE test), lactose, D-lyxose, D-mannitol, D-mannose,
melibiose, D-ribose, D-sorbitol, trehalose, D-xylose, erythritol, gentiobiose, glycerol, inositol, potassium-gluconate, L-arabinose,
L-rhamnose, methyl beta-D-xylopyranose, N-acetylglucosamine and xylitol.
Can utilize as sole carbon source: citrate, D-mannose, D-mannitol, N-acetyl-glucosamine, gluconate, capric acid, adipic acid, malic
acid and phenylacetate.
Negative results for beta-galactosidase, H2S production, indole production, lysine decarboxylase, nitrate reduction, ornithine
decarboxylase, starch hydrolysis, tryptophan deaminase, acid production from: amygdalin, arbutin, D-adonitol, D-arabinose, maltose,
melezitose, raffinose, sucrose, D-tagatose, turanose, dulcitol, glycogen, urea, inulin, L-arabitol, L-fucose, L-sorbose, L-xylose, methyl
alpha-D-glucoside, methyl alpha-D-mannoside and salicin.
No utilization of: L-arabinose and maltose.
Variable results for urease.
(casein hydrolysis) and lipolysis on tributyrin agar at both 6 and 28 ºC, Voges-Proskauer reaction, acid production from: D-arabitol,
cellobiose, D-fructose, D-fucose, D-galactose, D-glucose (negative in API 20 NE test), lactose, D-lyxose, D-mannitol, D-mannose,
melibiose, D-ribose, D-sorbitol, trehalose, D-xylose, erythritol, gentiobiose, glycerol, inositol, potassium-gluconate, L-arabinose,
L-rhamnose, methyl beta-D-xylopyranose, N-acetylglucosamine and xylitol.
Can utilize as sole carbon source: citrate, D-mannose, D-mannitol, N-acetyl-glucosamine, gluconate, capric acid, adipic acid, malic
acid and phenylacetate.
Negative results for beta-galactosidase, H2S production, indole production, lysine decarboxylase, nitrate reduction, ornithine
decarboxylase, starch hydrolysis, tryptophan deaminase, acid production from: amygdalin, arbutin, D-adonitol, D-arabinose, maltose,
melezitose, raffinose, sucrose, D-tagatose, turanose, dulcitol, glycogen, urea, inulin, L-arabitol, L-fucose, L-sorbose, L-xylose, methyl
alpha-D-glucoside, methyl alpha-D-mannoside and salicin.
No utilization of: L-arabinose and maltose.
Variable results for urease.
(c) Costin Stoica
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