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The genus Klebsiella was named after the German microbiologist Edwin Klebs (1834–1913). [citation needed] It is also known as Friedlander's bacillum in honor of Carl Friedländer, a German pathologist, who proposed that this bacterium was the etiological factor for the pneumonia seen especially in immunocompromised individuals such as people with chronic diseases or alcoholics.
Urease activity was first identified in 1876 by Frédéric Alphonse Musculus as a soluble ferment. [4] In 1926, James B. Sumner, showed that urease is a protein by examining its crystallized form. [5]
Klebsiella oxytoca on agar plate. Klebsiella oxytoca is a Gram-negative, rod-shaped bacterium that is closely related to K. pneumoniae, from which it is distinguished by being indole-positive; it also has slightly different growth characteristics in that it is able to grow on melezitose, but not 3-hydroxybutyrate.
Klebsiella is a genus of Gram-negative, oxidase-negative, rod-shaped bacteria with a prominent polysaccharide-based capsule. [3] Klebsiella is named after German-Swiss microbiologist Edwin Klebs (1834–1913). Carl Friedlander described Klebsiella bacillus which is why it was termed Friedlander bacillus for many years.
Klebsiella aerogenes, [2] previously known as Enterobacter aerogenes, is a Gram-negative, oxidase-negative, catalase-positive, citrate-positive, indole-negative, rod-shaped bacterium. [3] Capable of motility via peritrichous flagella, [ 4 ] it is approximately one to three microns in length.
Once a bacterium has been identified following microbiological culture, antibiotics are selected for susceptibility testing. [5] Susceptibility testing methods are based on exposing bacteria to antibiotics and observing the effect on the growth of the bacteria (phenotypic testing), or identifying specific genetic markers (genetic testing). [6]
The citrate test detects the ability of an organism to use citrate as the sole source of carbon and energy. ... Klebsiella pneumoniae: Positive; Frateuria aurantia ...
This enzyme hydrolyzes urea, releasing ammonia, which allows colonization of this acid-sensitive organism at low gastric pH. In addition, urease is a key protein used for detection of the organism by measuring serum antibody to the protein, enzyme activity directly in a gastric biopsy, or a product of hydrolysis (13 CO 2) using a urea breath test.
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