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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Bacteria => Proteobacteria => Gammaproteobacteria => Pseudomonadales => Pseudomonadaceae => Pseudomonas =>
Pseudomonas testosteroni Marcus and Talalay 1956.
Moved to Bacteria => Proteobacteria => Betaproteobacteria => Burkholderiales => Comamonadaceae => Comamonas testosteroni
(Marcus and Talalay 1956) Tamaoka et al. 1987 emend. Willems et al. 1991.
Pseudomonas testosteroni Marcus and Talalay 1956.
Moved to Bacteria => Proteobacteria => Betaproteobacteria => Burkholderiales => Comamonadaceae => Comamonas testosteroni
(Marcus and Talalay 1956) Tamaoka et al. 1987 emend. Willems et al. 1991.
Gram negative rods with polar flagella, 0.7-0.8 by 2.1-2.9 μm .
Obligately aerobic, 30ºC (no growth at 4 or 41 ºC). No pigments produced.
Can grow onTrypticase Soy Agar ± 5% sheep blood, Trypticase Soy Broth,
Mueller-Hinton agar, Mac Conkey agar
Can grow onTrypticase Soy Agar ± 5% sheep blood, Trypticase Soy Broth,
Mueller-Hinton agar, Mac Conkey agar
Isolated from soil, rarely from clinical specimens.
Generally non-pathogenic bacteria. 1 case of human purulent meningitis, 1 case of bactermia due to a perforated appendicitis.
Sometimes isolated from animal specimens with doubtful clinical implication (admin note).
Sometimes isolated from animal specimens with doubtful clinical implication (admin note).
- R.E. Buchanan & N.E. Gibbons (co-editors): Bergey’s Manual of Determinative Bacteriology, eighth edition, 232.
- Marcus P.I. & Talalay P.: Induction and purification of α- and β-hydroxysteroid dehydrogenases. Journal of Biological
Chemistry, 1956, 218, 661-674. - Tamaoka J., Ha D.M. & Komagata K.: Reclassification of Pseudomonas acidovorans den Dooren de Jong 1926 and
Pseudomonas testosteroni Marcus and Talalay 1956 as Comamonas acidovorans comb. nov. and Comamonas testosteroni
comb. nov., with an emended description of the genus Comamonas. Int. J. Syst. Bacteriol., 1987, 37, 52-59. - Willems A., Pot B., Falsen E., Vandamme P., Gillis M., Kersters K. & De Ley J.: Polyphasic taxonomic study of the emended
genus Comamonas: relationship to Aquaspirillum aquaticum, E. Falsen group 10, and other clinical isolates. Int. J. Syst.
Bacteriol., 1991, 41, 427-444. - Arda B, Aydemir S, Yamazhan T, Hassan A, Tunger A, Serter D. Comamonas testosteroni meningitis in a patient with recurrent
cholesteatoma. APMIS 2003;111:474-6. - Gul Mustafa et al.Comamonas testosteroni bacteremia in a patient with perforated acute appendicitis. Short communication.
Acta microbiologica et immunologica Hungarica 2007;54(3):317-21.
Can utilize for growth: Testosterone, Glycerol, Gluconate, Glycine, D- Alanine, L-
Alanine , L-Valine, DL-Norvaline, L-Leucine, L-Isoleucine, L-Norleucine, L-Threonine,
L-Phenylalanine, L-Tyrosine, L-Histidine, L-Tryptophan, L- Aspartate.
Cannot utilize Glucose, m-Erythritol, D-Fructose, L-Fucose, D-Tagatose, m-Inositol,
D-Mannitol, 2-Ketogluconate, 5-Ketogluconate, Amygdalin, beta-Alanine,
DL-2-Aminobutyrate, DL-Norleucine, L-Serine, L-Methionine, D-Tryptophan, L-Arginine.
Nitrates reduction variable, but nitrites reduction negative.
Alanine , L-Valine, DL-Norvaline, L-Leucine, L-Isoleucine, L-Norleucine, L-Threonine,
L-Phenylalanine, L-Tyrosine, L-Histidine, L-Tryptophan, L- Aspartate.
Cannot utilize Glucose, m-Erythritol, D-Fructose, L-Fucose, D-Tagatose, m-Inositol,
D-Mannitol, 2-Ketogluconate, 5-Ketogluconate, Amygdalin, beta-Alanine,
DL-2-Aminobutyrate, DL-Norleucine, L-Serine, L-Methionine, D-Tryptophan, L-Arginine.
Nitrates reduction variable, but nitrites reduction negative.
(c) Costin Stoica
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