What is the morphology of Pseudomonas?
28.4 MORPHOLOGY Pseudomonas is rod shaped, slender (0.5 to 0.8 µm by 1.5 to 3.0 µm) Gram negative organism, motile by polar flagella, sometimes more than two flagella may be present.
How would you describe Pseudomonas aeruginosa?
Pseudomonas aeruginosa is a Gram-negative, rod-shaped, asporogenous, and monoflagellated bacterium. It has a pearlescent appearance and grape-like or tortilla-like odour. P. aeruginosa grows well at 25°C to 37°C, and its ability to grow at 42°C helps distinguish it from many other Pseudomonas species.
What does 100000 CFU ml mean?
A full- blown infection will result in 100,000 colony- forming units (CFU) of bacteria. A milder infection, or an incompletely treated infection will result is less than 100,000 CFUs, such as 50,000 or 10,000.
How would you describe the gram reaction and morphology of Pseudomonas?
Pseudomonas aeruginosa is a Gram-negative, rod-shaped, motile organism (polar flagella) which characteristically produce water-soluble pigments which diffuse through the medium. The oxidase and catalase test for P. aeruginosa are positive.
What is the morphology of Klebsiella pneumoniae?
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.
Is P. aeruginosa citrate positive?
P. aeruginosa can be identified biochemically as having indophenol oxidase-positive, citrate-positive, and l-arginine dehydrolase-positive activity.
Is Pseudomonas aeruginosa indole positive?
Pseudomonas gives negative Voges Proskauer, indole and methyl red tests, but a positive catalase test. While some species show a negative reaction in the oxidase test, most species, including P.
What are the characteristics of Pseudomonas?
Characteristics
- Rod-shaped.
- Gram-negative.
- Flagellum one or more, providing motility.
- Aerobic.
- Non-spore forming.
- Catalase-positive.
- Oxidase-positive.
Is Pseudomonas aeruginosa catalase positive?
Can a Pseudomonas aeruginosa infection be treated with antibiotics?
Pseudomonas aeruginosa infections are generally treated with antibiotics. Unfortunately, in people exposed to healthcare settings like hospitals or nursing homes, Pseudomonas aeruginosa infections are becoming more difficult to treat because of increasing antibiotic resistance.
What kind of bacteria causes Pseudomonas in humans?
Pseudomonas infection is caused by strains of bacteria found widely in the environment; the most common type causing infections in humans is called Pseudomonas aeruginosa.
Which is the Gram negative rod of Pseudomonas aeruginosa?
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. 27-2). The flagella yield heat-labile antigens (H antigen).
What are the virulence factors of Pseudomonas alginate?
An alginate is antiphagocytic, and most strains isolated produce toxin A, a diphtheria-toxin-like exotoxin. All strains have endotoxin, which is a major virulence factor in bacteremia and septic shock. Host Defenses Phagocytosis by polymorphonuclear leukocytes is important in resistance to Pseudomonasinfections.