Acidovorax (Pseudomonas) delafieldii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae, Genus Pseudomonas,  
Pseudomonas delafieldii
Davis 1970.  
Moved to Class Betaproteobacteria, Order Burkholderiales, Family Comamonadaceae, Genus Acidovorax,
Acidovorax delafieldii  
Willems et al. 1990.
Gram-negative rods, 0.5 x 1.8-2.6 μm, motile by means of a single polar flagellum.
Strictly aerobic, optimal temperature 30 ºC. Organic growth factors not required. Can
grow in the presence of 1.5% NaCl, on Drigalski-Conradi agar, Trypticase Soy Agar &
Mueller-Hinton agar.
Hemolysis not produced.
Isolated from soil by enrichment with poli-beta-hydroxybutirate, also, isolated from water and various samples from clinical
environments.
No reports of human infections.
  1. Davis D.H.. In: Davis D.H., Stanier R.Y., Doudoroff M. & Mandel M.: Taxonomic studies on some Gram-negative polarly flagellated
    "hydrogen bacteria" and related species. Archiv fur Mikrobiologie, 1970, 70, 1-13.
  2. Willems A., Falsen E., Pot B., Jantzen E., Hoste B., Vandamme P., Gillis M., Kersters K. & De Ley J.: Acidovorax, a new genus for
    Pseudomonas facilis, Pseudomonas delafieldii, E. Falsen (EF) group 13, EF group 16, and several clinical isolates, with the
    species Acidovorax facilis comb. nov., Acidovorax delafieldii comb. nov., and Acidovorax temperans sp. nov. Int. J. Syst. Bacteriol.,
    1990, 40, 384-398.
  3. Anne Willems and Monique Gillis: Family IV. Comamonadaceae Willems, De Ley, Gillis and Kersters 1991a, 447VP. In Bergey’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, pp 686-759.
Can utilize as sole carbon source: ribose, arabinose, mannose, galactose, glycerol,
sorbitol, poli-beta-hydroxybutyrate.

Positive results for catalase, hydrolysis of Tween 80, growth on: D-mannose, L-arabinose, D-ribose, D-galactose, D-mannitol,
D-arabitol, sorbitol, D-fucose, D-fructose, gluconate, 2-ketogluconate, D-lactate, D-lactate + methionine, alpha-alanine,
L-alanine,
L-threonine, L-leucine, L-isoleucine, L-norleucine, L-serine, L-methionine, L-phenylalanine, L-tyrosine, L-histidine, L-aspartate,
L-ornithine, L-citrulline, n-valerate, isovalerate, fumarate, L-malate, glutarate, adipate, pimelate, DL-glycerate, meso-tartrate,
pyruvate, levulinate, 2-ketoglutarate & p-hydroxybenzoate
.

Negative results for arginine dihydrolase, DNase, esculin hydrolysis, gelatin hydrolysis, beta-galactosidase, H2S production, indole
production, nitrate reduction, nitrite reduction, denitrification, autotrophic growth with hydrogen
, lysine and ornithine decarboxylase.
No utilization of
: caprate, erythritol, itaconate, maltose, DL-norleucine L-valine, DL-norvaline, DL-2-aminobutyrate, beta-alanine,
DL-4-aminobutyrate, acetate, propionate, isobutyrate, n-caproate, heptanoate, maleate, citraconate, aconitate, citrate &
m-hydroxybenzoate.

Variable results for catalase, urease, utilization of L-tryptophan & D-tartrate.
(c) Costin Stoica
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