Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Aeromonadales, Family Aeromonadaceae, Genus
Tolumonas, Tolumonas osonensis Caldwell et al. 2011.
Gram-negative rods, 2.4-3.6 x 0.9 µm, singly or grouped in pairs or short chains.
Nonmotile.
Facultative anaerobe. Optimum temperature for growth is 22 ºC, ranging from 15 to 37
ºC. Grows at pH 5.5–8.5 (optimum, pH 7.5). Does not require vitamins or yeast extract
for growth.
Isolated from anoxic freshwater sediment.
Undetermined.
- Caldwell (M.E.), Allen (T.D.), Lawson (P.A.) and Tanner (R.S.): Tolumonas osonensis sp. nov., isolated from anoxic freshwater
sediment, and emended description of the genus Tolumonas. Int. J. Syst. Evol. Microbiol., 2011, 61, 2659-2663.
Positive results for alpha-galactosidase, beta-galactosidase, alpha-glucosidase,
beta-glucosidase, arginine arylamidase, leucine arylamidase (weak), alanine
arylamidase, glycine arylamidase, serine arylamidaseurea hydrolysis, utilization of N-acetyl-D-glucosamine, L-arabinose, cellobiose,
D-fructose, D-galactose, gentiobiose, alpha-D-glucose, lactose, lactulose, maltose, D-mannitol, D-mannose, melibiose, methyl
beta-D-glucoside, D-psicose, raffinose, D-sorbitol, sucrose, trehalose and turanose.
Negative results for alkaline phosphatase, arginine dihydrolase, indole production, beta-galactosidase-6-phosphate,
alpha-arabinosidase, beta-glucuronidase, N-acetyl-beta-glucosaminidase, glutamic acid decarboxylase, alpha-fucosidase, proline
arylamidase, leucyl glycine arylamidase, phenylalanine arylamidase, pyroglutamic acid arylamidase, tyrosine arylamidase, histidine
arylamidase, glutamyl glutamic acid arylamidase, cellulose hydrolysis, gelatin hydrolysis, chitin hydrolysis, nitrate reduction, starch
hydrolysis and sulfate reduction.
Can grow on glucose, fructose, cellobiose, melezitose, maltose, lactose, galactose, sucrose, ribose, raffinose, melibiose, trehalose,
mannose, turanose, glycogen, mannitol, sorbitol, amygdalin, pyruvate, fumarate, salicin, aesculin, inulin, N-acetyl-D-glucosamine and
yeast extract substrates.
Cannot grow on arabinose, xylose, glycerol, starch, inositol, adonitol, malate, glycolate, choline, betaine, trimethylamine, formate,
acetate, propionate, butyrate, lactate, succinate, methanol, ethanol, n-propanol, n-butanol, peptone and tryptone substrates.

(c) Costin Stoica