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Pseudomonas in Medical Microbiology

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Questions and Answers

Which type of bacteria are pseudomonads?

Gram-positive rods

Gram-negative cocci

Gram-negative rods (correct)

Gram-positive cocci

What distinguishes pseudomonads from members of the Enterobacteriaceae?

They are strict anaerobes

They are facultative aerobes

They are strict aerobes (correct)

They are facultative anaerobes

What is the significance of pseudomonads not fermenting glucose?

They produce pyocyanin

They are called non-fermenters (correct)

They are obligate anaerobes

They are spore-forming

What favors the persistence of pseudomonads in the hospital environment?

<p>Being able to grow in water containing only traces of nutrients</p> Signup and view all the answers

What pigments are produced by Pseudomonas aeruginosa?

<p>Pyocyanin and pyoverdin (fluorescein)</p> Signup and view all the answers

Study Notes

Pseudomonads

Pseudomonads are a type of Gram-negative, aerobic bacteria.

Distinction from Enterobacteriaceae

Pseudomonads are distinguished from members of the Enterobacteriaceae family by their ability to oxidize carbohydrates rather than ferment them.

Glucose Non-Fermentation

Pseudomonads do not ferment glucose, which signifies their ability to thrive in environments with limited nutrients.
This characteristic is significant because it allows pseudomonads to persist in environments where other bacteria may not survive.

Persistence in Hospital Environment

The persistence of pseudomonads in the hospital environment is favored by the presence of moist environments, such as sinks and humidifiers, and the use of broad-spectrum antibiotics.

Pseudomonas aeruginosa Pigments

Pseudomonas aeruginosa produces two pigments: pyocyanin (blue-green) and pyoverdin (yellow-green).
These pigments contribute to the bacterium's ability to colonize and cause infection in the human body.

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Description

Learn about the pathogenic species of Pseudomonas in medical microbiology and their characteristics such as being gram-negative rods and strict aerobes. Explore the differences between Pseudomonas and Enterobacteriaceae.