Legend: + positive 100%, - negative 100%
 
Susceptible to
desferrioxamine
Testosterone
utilization
Growth at
44 ºC
Pyrrolidone
aminopeptidase
Tyrosine
hydrolysis
3-Hydroxybenzoate
assimilation
L-alanine
assimilation
C. testosteroni
-
+
-
+
+
+
+
C. terrigena
+
-
-
+
+
-
+
C. aquatica
+
-
-
-
-
-
-
C. kerstersii
+
-
+
-
+
-
-
Differential characters of C. testosteroni, C. terrigena, C. aquatica and C. kerstersii:
Comamonas testosteroni
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Betaproteobacteria, Order Burkholderiales, Family Comamonadaceae, Genus Comamonas,
Comamonas testosteroni (Marcus and Talalay 1956) Tamaoka et al. 1987 emend. Willems et al. 1991.

Old synonym:
Pseudomonas testosteroni  Marcus and Talalay 1956.
Gram-negative rods with polar flagella, 0.7-0.8 by 2.1-2.9 μm .
Obligately aerobic, 30 ºC (no growth at 4 or 41 ºC). No pigments are produced.
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. One case of human purulent meningitis, one case of bactermia due to a perforated appendicitis.
Sometimes isolated from animal specimens with doubtful clinical implication (admin note).
  1. R.E. Buchanan & N.E. Gibbons (co-editors): Bergey’s Manual of Determinative Bacteriology, eighth edition, 232.
  2. Marcus P.I. & Talalay P.: Induction and purification of α- and β-hydroxysteroid dehydrogenases. Journal of Biological Chemistry,
    1956, 218, 661-674.
  3. 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.
  4. 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.
  5. 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.
  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.
  7. Wauters (G.), De Baere (T.), Willems (A.), Falsen (E.) and Vaneechoutte (M.): Description of Comamonas aquatica comb. nov. and
    Comamonas kerstersii sp. nov. for two subgroups of Comamonas terrigena and emended description of Comamonas terrigena.
    Int. J. Syst. Evol. Microbiol., 2003, 53, 859-862.
  8. Willems, A., Pot, B., Falsen, E., Vandamme, P., Gillis, M., Kersters, K., & De Ley, J. (1991). Polyphasic taxonomic study of the
    emended genus Comamonas: relationship to Aquaspirillum aquaticum, E. Falsen group 10, and other clinical isolates.
    International Journal of Systematic and Evolutionary Microbiology, 41(3), 427-444.
Can utilize for growth: testosterone, acetate, glycerol, gluconate, glycine, D-alanine,
L-alanine ,
itaconate, malate, 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,
maleate, malonate, DL-norleucine, L-serine, L-methionine,
D-tryptophan
& L-arginine. Nitrates reduction is variable, but nitrites reduction is
negative.
(c) Costin Stoica
Antibiogram
Encyclopedia
Culture media
Biochemical tests
Stainings
Images
Movies
Articles
Identification
Software
R E G N U M
PROKARYOTAE
Previous page
Back