Pseudomonas oryzihabitans
Cultural characteristics
Biochemical characters
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae, Genus Pseudomonas,
Pseudomonas oryzihabitans  
Kodama et al. 1985.
Flavimonas oryzihabitans  Holmes et al. 1987; CDC group Ve-2
Gram-negative, 0.5-0.8 by 1.5-3 μm rods with polar monotrichous flagella.
No diffusible fluorescent pigments produced. A water-insoluble yellow pigment is
produced. No haemolysis on blood agar. S-type (sometimes R), 1-2 mm diameter
after 24-48 h,  yellow colonies.  A pellicle is formed on the surface of 0.5% glucose
nutrient broth.
Strictly aerobic, optimal temperature 30-37 ºC, no growth at 5 and 41 ºC. Can grow on:
Trypticase Soy Agar ± 5% sheep blood, Trypticase Soy Broth, Mueller-Hinton agar,
Mac Conkey agar, Glucose nutrient agar, Simmons citrate agar.
Isolated from soil, water, plants & clinical specimens. Susceptible to ampicillin, carbenicillin, cefotaxime, chloramphenicol, colistin,
erythromycin, gentamicin, kanamycin, moxalactam, neomycin, polymyxin, streptomycin, and tetracycline.
Associated with the entomopathogenic nematode
Steinernema abbasi.
Can cause peritonitis, endophtalmitis, septicemia, bacteremia; particularly in immunocompromised patients. Infection is frequently
linked to implanted or indwelling materials or to invasive procedures.
Pathogen for rice (
Oryza sativa). Reported as possible biological agent towards some plant root pathogens (Fusarium oxysporum f.
sp. lycopersici, Rhizoctonia solani
) and the plant-parasitic nematodes Meloidogyne spp. and Globodera rostochiensis.
  1. Anzay Y., Kudo Y. & Oyaizu H.: The phylogeny of the genera Chryseomonas, Flavimonas, and Pseudomonas supports synonymy
    of these three genera. Int. J. Syst. Bacteriol., 1997, 47, 249-251.
  2. W Bendig, P J Mayes, D E Eyers, B Holmes, and T T Chin: Flavimonas oryzihabitans (Pseudomonas oryzihabitans; CDC group
    Ve-2): an emerging pathogen in peritonitis related to continuous ambulatory peritoneal dialysis? J Clin Microbiol. 1989 January; 27
    (1): 217–218.
  3. A Vilas Iglesias &  J Suárez Martínez: Bronchiectasis Due to Flavimonas Oryzihabitans in an Immunocompetent Patient. Arch
    Bronconeumol 2004; 40: 384 – 385.
  4. Kodama K., Kimura N. & Komagata K.: Two new species of Pseudomonas: P. oryzihabitans isolated from rice paddy and clinical
    specimens and P. luteola isolated from clinical specimens. Int. J. Syst. Bacteriol., 1985, 35, 467-474.
Catalase is produced. Nitrate is reduced to nitrite (succinate-nitrate medium). Urease is produced. Acid is produced from
L-arabinose, D-xylose, D-glucose, D-fructose, D-mannose, D-galactose, maltose, trehalose, mannitol, sorbitol & inositol.
Can utilize L-arabinose, D-xylose, D-ribose, D-glucose, D-fructose, D-mannose, D-galactose, maltose, trehalose, mannitol,
glycerol, acetate, pyruvate, malonate, DL-beta-n-hydroxybutyrate, fumarate, gluconate, 2-ketogluconate, succinate,
p-hydroxybenzoate & glutamate.
Acid is not produced from L-rhamnose, sucrose, lactose, cellobiose, adonitol, salicin & inulin.
Sucrose, lactose, raffinose, inulin, starch, phenol, o-hydroxybenzoate & m-hydroxybenzoate are not utilized.
Oxidase is not produced. Indole and hydrogen sulfide are not produced. Starch, Tween 80, esculin, and ONPG are not hydrolyzed.
Gelatin is not hydrolyzed. Acid and alkaline phosphatases, lysine and ornithine decarboxylases, phenylalanine deaminase & arginine
dihydrolase are not produced. Gluconate is not oxidized.
(c) Costin Stoica
Culture media
Biochemical tests
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