What is the shape of Pseudomonas aeruginosa?
P. aeruginosa is a heterotrophic, motile, Gram-negative rod-shaped bacterium about 1–5 µm long and 0.5–1.0 µm wide. It is a facultative aerobe that grows via aerobic respiration and anaerobic respiration with nitrate as the terminal electron acceptor.
Is Pseudomonas aeruginosa shape and arrangement?
Pseudomonas aeruginosa is a Gram-negative, rod-shaped, asporogenous, and monoflagellated bacterium.
How is Pseudomonas aeruginosa arranged?
Arrangement Of Cells – Pseudomonas aeruginosa is arranged singly or in pairs. Motility – Pseudomonas aeruginosa is an actively motile bacterium. Flagella – P. aeruginosa is a flagellated bacterium with a polar flagellum, arranged in an amphitrichous manner.
What is the Gram stain morphology of Pseudomonas aeruginosa?
Pseudomonas aeruginosa is a Gram-negative rod measuring 0.5 to 0.8 μm by 1.5 to 3.0 μm.
How would you describe the shape and margin of the Pseudomonas aeruginosa colonies?
Pseudomonas produces large, opaque, flat colonies with irregular margins and distinctively fruity odour colonies. The colour of growth will depend upon the type of pigments (enumerated below) produced by the organism. The isolates from water and soil produce small round colonies.
Does Pseudomonas aeruginosa form endospores?
Pseudomonas aeruginosa is a gram-negative, aerobic, non-spore forming rod that is capable of causing a variety of infections in both immunocompetent and immunocompromised hosts.
What shape are S aureus?
S. aureus cells are Gram-positive and appear in spherical shape. They are often in clusters resembling bunch of grapes when observed under light microscope after Gram staining.
Does Pseudomonas aeruginosa grow on MacConkey agar?
Apart from the media mentioned above, Pseudomonas aeruginosa can also be grown in MacConkey agar (a bacterial culture medium commonly used to grow lactose fermenting bacteria). In MacConkey agar, Pseudomonas aeruginosa forms flat and smooth colonies that are between 2 and 3mm in diameter.
What is the shape of Enterobacter aerogenes?
Enterobacter aerogenes is a nosocomial and pathogenic bacterium that causes opportunistic infections. It is a gram-negative, rod-shaped bacteria. E. aerogenes is generally found in the human gastrointestinal tract and does not generally cause disease in healthy individuals.
Is Pseudomonas aeruginosa oxidase positive or negative?
In the oxidase test, artificial electron donors and acceptors are provided. When the electron donor is oxidized by cytochrome oxidase it turns a dark purple. This is considered a positive result. In the picture below the organism on the right (Pseudomonas aeruginosa) is oxidase positive.