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.Ĭommunity-acquired pneumonia caused by Klebsiella pneumoniae may occasionally be called Friedländer's pneumonia.
The genus Klebsiella was named after the German microbiologist Edwin Klebs (1834–1913). oxytoca from which it is distinguished by being indole-negative and by its ability to grow on melezitose but not 3-hydroxybutyrate. pneumoniae has been demonstrated to increase crop yields in agricultural conditions. As a free-living diazotroph, its nitrogen-fixation system has been much-studied, and is of agricultural interest, as K. It naturally occurs in the soil, and about 30% of strains can fix nitrogen in anaerobic conditions.
In recent years, Klebsiella species have become important pathogens in nosocomial infections. rhinoscleromatis have also been demonstrated in human clinical specimens. In the clinical setting, it is the most significant member of the genus Klebsiella of the Enterobacteriaceae. It appears as a mucoid lactose fermenter on MacConkey agar.Īlthough found in the normal flora of the mouth, skin, and intestines, it can cause destructive changes to human and animal lungs if aspirated, specifically to the alveoli resulting in bloody, brownish or yellow colored jelly-like sputum. Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose- fermenting, facultative anaerobic, rod-shaped bacterium.
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