Genus Pragia
Taxonomy
Morphology
Growth conditions
Biochemical characters
Ecology
Pathogenicity
References
Proteobacteria => Gammaproteobacteria => Enterobacteriales => Enterobacteriaceae => Pragia => Pragia fontium - type species of
the genus, Aldova et al. 1988.
Gram negative rods. Motile.
Facultatively anaerobic, growth temperature 30 °C.
Grow on media: Nutrient agar or nutrient broth (some strains produce a Shigella-like
odour on nutrient agar), Trypticase Soy Agar ± 5% sheep blood, TY broth (8 g casein
enzymatic hydrolysate type I, 5 g yeast extract powder, 5 g NaCl per 1,000 ml H2O).
Isolated from water (17) & feces (1).
Unknown pathogenicity (non-pathogenic).
  1. Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994;
  2. Aldova E., Hausner O., Brenner D.J., Kocmoud Z., Schindler J., Potuznikova B. & Petras P.: Pragia fontium gen. nov., sp. nov. of
    the family Enterobacteriaceae, isolated from water. Int. J. Syst. Bacteriol., 1988, 38, 183-189.
H2S prouction - positive. LDC, ODC & ADH negative. See table at the end.
(c) Costin Stoica

 

Pigment

Catalase

Oxidase

Lactose

ONPG

Arginine dihydrolase

Lysine decarboxylase

Ornithine decarboxylase

Pragia fontium

-

+

-

-

-

-

-

-

 

Indole production

Citrate utilization

Hydrogen sulfide

Urea hydrolysis

Voges-Proskauer

Phenilalanine

Motility

Gelatinase

Growth on KCN media

Malonate

-

[+]

+

-

-

[-]

+

-

-

-

 

Glucose

Gas from glucose

D-Mannitol

Inositol

D-Sorbitol

L-Rhamnose

Sucrose (Sacharose)

Melibiose

L-Arabinose

Nitrate reduction

+

-

-

-

-

-

-

-

-

+

 

Cellobiose

Dulcitol

Glycerol

Maltose

D-Mannose

Alfa-Methyl-D-Glucoside

Raffinose

Salicin

Trehalose

D-Xylose

-

-

-

-

-

-

-

[+]

-

-

 

Mucate

Tartrate (Jordans)

Esculin hydrolysis

Acetate utilization

Deoxyribonuclease

Lipase

Mehyl red

D-Adonitol

-

-

[+]

-

-

-

+

-
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