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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Klebsiella oxytoca
Etymology: Genus name: named after the German bacteriologist Edwin Klebs (1834-1913).
Species epithet: acid-producing.
Significance:Has a certain importance in food hygiene
  [Of minor importance]   
Taxonomy:
Phylum
Pseudomonadota
Class
Gammaproteobacteria
Order
Enterobacterales
Family
Enterobacteriaceae 
Genus
Klebsiella
Type Strain: ATCC 13182= CCUG 15717
Macromorphology (smell):
     
 
Form medium sized, dome shaped, white and glistening colonies (2-3 mm i diameter). Ger ej hemolys på blodagar.
Micromorphology: Nonmotile rods (0.3-1.0 x 0.6-6.0 µm), which appear singly, in pairs or in short chains.
Gram +/Gram -:
 
G-
Metabolism: Facultatively anaerobic
Catalase/Oxidase:+/-
Other Enzymes: DNase -, esculinase +, tryptophanase + (= indole +), urease +.
Biochemical Tests: Citrate +, hydrogene sulfide -, methyl red (-), ornithine decarboxylase -, Voges-Proskauer +
Fermentation of carbohydrates:
D-glucose
+
lactose
+
maltose
+
L-rhamnose
+
sucrose
+
L-arabinose
+
cellobiose
+
D-mannitol
+
salicin
+
trehalose
+
glycerol
+
inulin
?
raffinose
+
D-sorbitol
+
starch
?
Form gas under fermentation of glucose. Other carbohydrates: erythritol -.
Spec. Char.:
Disease:Diarrhea, bacteremia and mastitis in cattle.
Hosts: Is an opportunist, which may be found in the intestinal tract of animals and humans.
Clinical Picture:
Virulence Factors: A low molecular weight cytotoxin, which is called tilivalline.
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
EU231629 TCCC 11019 1 532  

Taxonomy/phylogeny:
 
Within genus Klebsiella 13 species have been described. K. oxytoca belongs to the family Enterobacteriaceae and is closely related to members of the genus Citrobacter. In fact, members of the genus Klebsiella and Citrobacter freundii form a monophyletic cluster (see Fig. 156:6 to the left).
Updated:2023-03-29

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