Is Klebsiella pneumoniae Gram-negative or gram positive?
Klebsiella pneumoniae is a gram-negative, lactose-fermenting, non-motile, aerobic rod-shaped bacterium. It has been a known human pathogen since it was first isolated in the late nineteenth century by Edwin Klebs. The microbiology, pathogenesis, and epidemiology of infections due to K.
What is the Gram reaction of Klebsiella?
Infectious Diseases Klebsiella pneumoniae is a Gram-negative, rod-shaped bacillus from the genus Klebsiella and family Enterobacteriaceae (Boone et al., 2001). K. pneumoniae is facultatively anaerobic, oxidase-negative, and produces acid and gas from lactose.
Is Klebsiella spp Gram-negative?
General Information. Klebsiella [kleb−see−ell−uh] is a type of Gram-negative bacteria that can cause different types of healthcare-associated infections, including pneumonia, bloodstream infections, wound or surgical site infections, and meningitis.
Is Pseudomonas aeruginosa gram-positive?
Pseudomonas aeruginosa is a Gram-negative rod measuring 0.5 to 0.8 μm by 1.5 to 3.0 μm. Almost all strains are motile by means of a single polar flagellum, and some strains have two or three flagella (Fig.
Is Klebsiella oxytoca gram-positive or negative?
oxytoca. Only K. pneumoniae, K. oxytoca and Pseudomonas aeruginosa are gram negative bacilli.
How can you tell the difference between Klebsiella species?
The five clinically important species can be distinguished by tests for indole production, ornithine decarboxylase production, he Voges-Proskauer reaction, malonate utilization and o-nitrophenyl-β-D-galactopyranoside (ONPG) production (1).
How would you describe Klebsiella pneumoniae grown on blood agar and MacConkey agar plates?
Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose-fermenting, facultative anaerobic, rod-shaped bacterium. It appears as a mucoid lactose fermenter on MacConkey agar.
Is Klebsiella oxytoca Gram-positive or negative?
Is Klebsiella ozaenae an opportunistic pathogen?
K. ozaenae is also considered to be an opportunistic pathogen in immunocompromised hosts ( 65, 145 , 257 ). The members of the genus Klebsiella are Gram negative, nonmotile, facultative anaerobic rods ranging from 0.3 to 1.0 μm in width to 0.6-6.0 μm in length ( 1 ).
Is Klebsiella harmless or harmful?
Harmless strains of Klebsiella are beneficial because they fix nitrogen in soil. Pathogenic species include K. pneumoniae, K. rhinoscleromatis, and K. ozaenae, also known as K. pneumoniae subspecies pneumoniae, rhinoscleromatis, and ozaenae.
Is Klebsiella anaerobic or fermentative?
Facultatively anaerobic. Chemoorganotrophic; respiratory and fermentative types of metabolism. Most species ferment all carbohydrates except dulcitol and erythritol. Klebsiella species are distributed in a wide variety of environments including: the gastrointestinal tract, clinical specimens, soil, water and grain.
Does Klebsiella ozaenaebacteremia affect the nasal cavity?
Subsequent evaluation of her nasal cavity and sinuses did not show any abnormalities. Klebsiella ozaenaeis primarily a colonizer of the oral and nasopharyngeal mucosa, which does not usually cause severe infections. Only 12 cases of Klebsiella ozaenaebacteremia have been reported, none of them in the context of solid organ transplant recipient.