Genus Raoultella
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Enterobacteriales, Family Enterobacteriaceae, Genus Raoultella,
-
Raoultella ornithinolytica (Sakazaki et al. 1989) Drancourt et al. 2001, basonym: Klebsiella ornithinolytica Sakazaki et al. 1989;
-
Raoultella planticola (Bagley et al. 1982) Drancourt et al. 2001, Basonym: Klebsiella planticola Bagley et al. 1982;
-
Raoultella terrigena (Izard et al. 1981) Drancourt et al. 2001, Basonym: Klebsiella terrigena Izard et al. 1981.
Gram-negative, straight, non-motile, capsulated, 0.3-1.0 μm x 0.6-6 μm bacilli.
K. oxytoca strains produce a dark brown pigment when growth on media containing
gluconate and ferric citrate.
Glistening moist colonies of varying degrees of stikiness (M–type colonies).
No special requirements. Facultatively anaerobic, optimum growth temperature 35 -
37 ºC. Can grow at 10 ºC. Media: Nutrient agar or Nutrient broth, Trypticase Soy Agar ±
5% sheep blood, Mac Conkey agar, Mueller-Hinton agar.
Widely distributed in nature. Isolated from soil and plants, where they seem to be responsible for nitrogen fixation, also isolated from
water, and some from clinical specimens (humans & animals).
Undetermined.
  1. J. G. Holt et al., 1994. Facultatively Anaerobic Gram-Negative Rods. Subgroup 1. Family Enterobacteriaceae. In: Begey’s Manual of
    Determinative Bacteriology, 9th-edition, Williams & Wilkins, pp 175-189.
  2. Don J. Brenner and J.J. Farmer III, 2001. Family I. Enterobacteriaceae. In: Bergey’s Manual of Systematic Bacteriology, Second
    edition, Vol two, part B, George M. Garrity (Editor-in-Chief), pp 587-897.
  3. M Drancourt, C Bollet, A Carta, and P Rousselier. Phylogenetic analyses of Klebsiella species delineate Klebsiella and Raoultella
    gen. nov., with description of Raoultella ornithinolytica comb. nov., Raoultella terrigena comb. nov. and Raoultella planticola comb.
    nov. Int J Syst Evol Microbiol May 2001 51:925-32.
Positive results for ONPG, lysine decarboxylase, catalase, nitrate reduction, esculin
hydrolysis (most strains),acid production from: L-arabinose, D-adonitol, cellobiose,
glucose, mannitol, melibiose, maltose, D-mannose, raffinose, salicin, trehalose &
D-xylose.

Negative results for oxidase, arginine dihydrolase, H
2S production, phenylalanine deaminase, gelatin hydrolysis, DN-ase & lipase.
(c) Costin Stoica
Antibiogram
Encyclopedia
Culture media
Biochemical tests
Stainings
Images
Movies
Articles
Identification
Software
R E G N U M
PROKARYOTAE
 
Acetate
utilzation
D-melezitose
(acid)
Ornithine
decarboxylase
Indole
production
Citrate
utilization
Voges-Proskauer
Urea
hydrolysiss
Raoultella  ornithinolytica
+
-
+
+
+
[+]
+
Raoultella  planticola
d
-
-
[-]
+
+
+
Raoultella terrigena
[-]
+
[-]
-
d
+
-
Differential characters of the species from geneus Raoultella:
Legend: +  positive 90-100%, - negative 90-100%, [+] positive 75-89%, [-] negative 75-89%, d positive 25-74% of strains
Previous page