What is the morphology of Pseudomonas aeruginosa?

What is the morphology of 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.

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.

How is Pseudomonas aeruginosa identified in the lab?

Diagnosis of P aeruginosa depends on its isolation and laboratory identification. It grows well on most laboratory media and commonly is isolated on blood agar plates or eosin-methylthionine blue agar. Other pseudomonads are identified by specific laboratory tests.

What is the morphology of Pseudomonas fluorescens?

Pseudomonas fluorescens is a common Gram-negative, rod-shaped bacterium.

How do you test for Pseudomonas aeruginosa?

Doctors diagnose Pseudomonas aeruginosa infections by taking a sample of blood or other body fluids and sending it to a laboratory to grow (culture) and identify the bacteria.

What does Pseudomonas aeruginosa look like on MacConkey Agar?

After 24, Pseudomonas aeruginosa appear as blue-green colonies. If other Pseudomonas or non-fermenting bacteria are present, they are not blue-green in color. In MacConkey agar, Pseudomonas aeruginosa forms flat and smooth colonies that are between 2 and 3mm in diameter.

Does Pseudomonas aeruginosa grow on pea agar?

PEA agar is a selective medium that permits the growth of gram-positive cocci while inhibiting the growth of most gram-negative organisms. aeruginosa are gram negative rods and seem to be growing equally as well as the gram positive organisms.

What are the other laboratory tests used to identify Pseudomonas aeruginosa?

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. fluorescens, give a positive result (Figure 2).

Is there a test for Pseudomonas aeruginosa?

The Pseudalert Test detects the presence of Pseudomonas aeruginosa in water samples. The test is based on a bacterial enzyme detection technology that signals the presence of P. aeruginosa through the hydrolysis of a substrate in the Pseudalert reagent.

Is Pseudomonas Fragi Gram positive or negative?

INTRODUCTION. Pseudomonas fragi is a psychrotrophic, Gram-negative bacterium that is able to grow at temperatures ranging from 2°C to 35°C (Ercolini et al. 2010).