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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Bacteria => Proteobacteria => Gammaproteobacteria => Pseudomonadales => Pseudomonadaceae => Pseudomonas =>
Pseudomonas delafieldii Davis 1970.
Moved to Bacteria => Proteobacteria => Betaproteobacteria => Burkholderiales => Comamonadaceae => Acidovorax => Acidovorax
delafieldii Willems et al. 1990.
Pseudomonas delafieldii Davis 1970.
Moved to Bacteria => Proteobacteria => Betaproteobacteria => Burkholderiales => Comamonadaceae => Acidovorax => Acidovorax
delafieldii Willems et al. 1990.
Gram negative, 0.5 x 1.8-2.6 μm, motile rods 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.
grow in the presence of 1.5% NaCl, on Drigalski-Conradi agar, Trypticase Soy Agar &
Mueller-Hinton agar.
Isolated from soil by enrichment with poli-beta-hydroxybutirate, also, isolated from water and various samples from clinical
environments.
environments.
No reports of human infections.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- 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. - 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.
Can utilize as sole carbon source: ribose, arabinose, mannose, galactose, glycerol,
sorbitol, poli-beta-hydroxybutirate.
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-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 are positive
Gelatinase, nitrate reduction, nitrite reduction, denitrification, autotrophic growth with hydrogen, growth on: 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 are negative.
Growth on L-Tryptophan & D-Tartrate is variable.
sorbitol, poli-beta-hydroxybutirate.
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-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 are positive
Gelatinase, nitrate reduction, nitrite reduction, denitrification, autotrophic growth with hydrogen, growth on: 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 are negative.
Growth on L-Tryptophan & D-Tartrate is variable.
(c) Costin Stoica
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