Legend: + positive 100%, - negative 100%
Positive results for catalase, nitrates reduction (but not nitrites), oxidase & tyrosine hydrolysis.
Can utilize for growth: valerate, 3-hydroxybutyrate, L-proline,
itaconate, suberate, acetate, lactate and 4-hydroxybenzoate
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, pyrrolidone arylamidase
& urease. Carbohydrates are neither acidified nor
assimilated.
Cannot utilize 3-hydroxybenzoate & L-alanine.


Variable results for the utilization of caprate.
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 kerstersii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Class Betaproteobacteria, Order Burkholderiales, Family Comamonadaceae, Genus Comamonas, Comamonas kerstersii Wauters et
al. 2003.

Syonyms:
Comamonas aquatica  was previously known as Comamonas terrigena
DNA group 3.
Gram-negative rods, Motile by multitrichous polar flagella, often with bipolar tufts.
After 24 h incubation at 30 ºC, colonies reach a diameter of 1.5 mm on blood agar
(more than 2 mm at 40 ºC). Grows aerobically on Tryptic Soy agar and broth at 30 and
35, 42 and 44 ºC;  optimum at 35
-40 ºC.
Isolated from human sample. Susceptible to desferrioxamine and colistin.
Undetermined.
  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).
(c) Costin Stoica
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