Legend: + positive 100%, - negative 100%
Positive results for catalase, nitrates reduction (but not nitrites), oxidase, pyrrolidone arylamidase & tyrosine hydrolysis.
Can utilize for growth: L-alanine, acetate, L-aspartate, 3-hydroxybutyrate, isobutyrate, lactate,
L-leucine, L-proline, suberate,
succinate, propionate, pyruvate & valerate. Simmons’ citrate agar test may be positive, but irregular and delayed.

Negative results for alkaline phosphatase, arginine dihydrolase, esculin hydrolysis, gelatin hydrolysis,
H2S production, indole
production, lysine decarboxylase, ornithine decarboxylase, starch hydrolysis, Tween 80 hydrolysis & urease. Carbohydrates are
neither acidified nor assimilated. Cannot utilize L-arginine, benzoate, m-erythritol, glycine, glycerol (type strain is positive),
glycolate, L-histidine, 3-hydroxybenzoate, 4-hydroxybenzoate, 2- and 5-ketogluconate, maleate, malonate,  
L-serine, D- or L-
tartrate, trigonelline, L-threonine (type strain is positive)
, L-tryptophan & L-valine.

Variable results for the utilization of caprate, gluconate, itaconate, mesaconate
& phenylalanine.
Differential characters of C. testosteroni, C. terrigena, C. aquatica and C. kerstersii:
 
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
+
-
+
-
+
-
-
Comamonas terrigena
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Betaproteobacteria, Order Burkholderiales, Family Comamonadaceae, Genus Comamonas,
Comamonas terrigena (ex Hugh 1962) De Vos et al. 1985,  emend. Wauters et al. 2003 - type species of the genus.

- Comamonas terrigena DNA group 2 (containing former Aquaspirillum aquaticum)
changed into
Comamonas aquatica.
- Comamonas terrigena DNA group 3 changed into Comamonas kerstersii.
Gram-negative rods, Motile by multitrichous polar flagella, often with bipolar tufts.
After 24 h incubation at 30 ºC, colonies reach a diameter of 1.0 mm on blood agar.
Grows aerobically on Tryptic Soy agar and broth at 30 and 35 ºC;  n
ot at 40 ºC. No
growth on cetrimide. Can grow on Drigalski-Conradi agar.
Isolated from hay-infusion filtrate, soil and human sample. Susceptible to desferrioxamine and colistin.
Undetermined. One report of human acute bacterial endocarditis due to C. terrigena.
  1. 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.
  2. Euzeby (J.P.): List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int. J. Syst. Bacteriol.,
    1997, 47, 590-592. (List of Prokaryotic names with Standing in Nomenclature. http://www.bacterio.net).
  3. Anne Willems and Monique Gillis: Family IV. Comamonadaceae Willems, De Ley, Gillis and Kersters 1991a,447VP, Genus I.
    Comamonas in Beregey’s Manual of Systematic Bacteriology Second Edition Volume Two The Proteobacteria Part C The Alpha-,
    Beta-, Delta-, and Epsilonproteobacteria, George M. Garrity (Editor-in-Chief), 2005, 689-696.
  4. Sonnenwirth AC. 1970. Bacteremia with and without meningitis due to Yersinia enterocolitica, Edwardsiella tarda, Comamonas
    terrigena, and Pseudomonas maltophilia. Ann. N. Y. Acad. Sci. 174:488–502.
  5. 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.
(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