Klebsiella pneumoniae is a rod-shaped, Gram-negative bacterium that belongs to the family Enterobacteriaceae and is widely distributed in the mouth, skin, intestines, hospital settings, and medical devices.
What is the shape of Klebsiella pneumoniae?
Klebsiella is a Gram-negative, non-motile, and rod-shaped bacteria.
Does Klebsiella have mucoid colonies?
Both wild-type and plasmidless strains are encapsulated, but only the former presented mucoid colonies. Participation of this phenotype in the virulence of K. pneumoniae was demonstrated by constructing a mutant altered in the plasmid gene encoding this phenotype.
Is Klebsiella cocci or bacilli?
Klebsiella is a genus of Gram-negative, oxidase-negative, rod-shaped bacteria with a prominent polysaccharide-based capsule. Klebsiella species are found everywhere in nature.
What structural feature of Klebsiella species produce the mucoid nature of the colony?
The principal virulence factor that has been described for K. pneumoniae is its polysaccharide capsule, which comes in more than 70 antigenic varieties and is responsible for its mucoid colony phenotype.
What are the basic categories of colony morphology?
Colony morphological characteristics may be viewed with the naked eye, a hand lens, a stereo (dissecting) microscope, or a colony counter (Fig. 2.3). The seven basic categories include colony size, shape, margin (edge), surface, elevation, texture, and optical properties (Fig.
Is Klebsiella pneumoniae Gram-negative bacilli?
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.
Shape – Klebsiella pneumoniae is a short, plump, straight rod shape (bacillus) bacterium. Size – The size of Klebsiella pneumoniae is about 1–2 µm × 0.5–0.8 µm (micrometer). Arrangement Of Cells – K. pneumoniae is arranged singly, in pairs, or in short chains and sometimes in clusters. MORPHOLOGY OF KLEBSIELLA PNEUMONIAE
What does Klebsiella pneumoniae colonies look like on eosin methylene blue agar?
In Eosin Methylene Blue Agar (EMB) medium, the colonies of Klebsiella pneumoniae are Pink to purple in color without green metallic sheen which is of great importance in differentiating K. pneumoniae from other bacteria normally found in Specimen and especially from E. coli which grows with Green metallic sheen.
Is Klebsiella pneumoniae aerobic or anaerobic?
⇒ Oxygen requirements – Klebsiella pneumoniae (K. pneumoniae) is an aerobic bacterium i.e. grow best in the presence of oxygen and it is also a Facultative anaerobic organism i.e. can grow in the low oxygen environment. Check out the preparation of MacConkey Agar medium in Laboratory PREPARATION OF MACCONKEY AGAR MEDIUM (MAC) IN LABORATORY
Where do you find Klebsiella in nature?
Klebsiella species are distributed in a wide variety of environments including: the gastrointestinal tract, clinical specimens, soil, water and grain. Klebsiellae are opportunistic pathogens that can give rise to bacteremia, pneumonia, urinary tract and several other types of human infection.
