Veterinary bacteriology: information about important bacteria
|Species/Subspecies:||Klebsiella pneumoniae subsp. pneumoniae|
|Etymology:||Genus name: named after the German bacteriologist Edwin Klebs (1834-1913).|
Species epithet: of pneumonia. Subspecies epithet: see Species epithet.
|Type Strain:||ATCC 13883 = CCUG 225 = NCTC 9633.|
||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-|
|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:||
Lactose + (although weaker than for instance E. coli). Ferments glucose under gas production.
|Spec. Char.:||K. pneumoniae can form about 80 different types of a capsule consisting of different variants of a polysaccharide.|
||SELMA- or SELMA Plus plates are used for milk samples and CLED agar for urine samples.|
|Virulence Factors:||LPS, capsule.|
|16S rRNA Seq.:|
||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).|
|New names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...