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pseudomonas aeruginosa colonies on blood agar surrounded by a zone of beta-hemolysis
microscope picture gram negative rods

Pseudomonas aeruginosa

Colonies of Pseudomonas aeruginosa on blood agar surroundend by a wide zone of beta-hemolysis. Cultivation 48 hours in an aerobic atmosphere, 37°C.

An opportunistic, nosocomial pathogen of immunocompromised individuals, P. aeruginosa typically infects the pulmonary tract, urinary tract, burns and wounds. It is the most common cause of infections of burn injuries and of the external ear (otitis externa), and is the most frequent colonizer of medical devices (e.g., catheters). Pseudomonas can, in rare circumstances, cause community-acquired pneumonias, as well as ventilator-associated pneumonias, being one of the most common agents isolated in several studies.
Text: Wikipedia
Gram-negative, motile rods.