| Species/Subspecies: | Klebsiella pneumoniae subsp. pneumoniae | ||||||||||||||||||
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| Etymology: | Genus name: named after the German bacteriologist Edwin Klebs (1834-1913). Species epithet: of pneumonia. Subspecies epithet: see Species epithet. | ||||||||||||||||||
| Significance: | [Very important] | ||||||||||||||||||
| Taxonomy: | Class Gammaproteobacteria Order Enterobacterales Family Enterobacteriaceae Genus Klebsiella |
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| Type Strain: | ATCC 13883 = CCUG 225 = NCTC 9633. | ||||||||||||||||||
| Macromorphology (smell):
| Grey, round, shiny and mucoid colonies (>3 mm in diameter), which can be confused with colonies of Enterobacter spp. Does not give hemolysis on blood agar. | ||||||||||||||||||
| Micromorphology: | Nonmotile rods (0.3-1.0 x 0.6-6.0 µm), which appear singly, in pars or in short chains. | ||||||||||||||||||
| Gram +/Gram -: | G- | ||||||||||||||||||
| Metabolism: | Facultatively anaerobic | ||||||||||||||||||
| Catalase/Oxidase: | +/- | ||||||||||||||||||
| Other Enzymes: | β-glucoronidase - (cf. E. coli spp.), DNase -, esculinase +, ornithine decarboxylase -, tryptophanase - (= indol -), urease +. | ||||||||||||||||||
| Biochemical Tests: | Citrate +, hydrogen sulfide -, methyl red -, 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 ? |
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| Spec. Char.: | K. pneumoniae can form about 80 different types of a capsule consisting of different variants of a polysaccharide. | ||||||||||||||||||
| Special Media:
| SELMA- or SELMA Plus plates are used for milk samples and CLED agar for urine samples. | ||||||||||||||||||
| Disease: |
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| Virulence Factors: | LPS, capsule. | ||||||||||||||||||
| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Within genus Klebsiella 13 species have been described. K. pneumoniae subsp. pneumoniae 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. 69:9 to the left). | ||||||||||||||||||
| Comment: | Opportunistic | ||||||||||||||||||
| Updated: | 2023-03-29 |