The pseudomonas bacteria, Pseudomonas aeruginosa, is a Gram-negative, rod-shaped bacteria. It is classified as aerobic, though it is known sometimes to thrive in conditions with little or no oxygen. The bacteria is motile due to at least one polar flagella, and it is non-spore forming.
This bacteria is commonly spread in hospitals and other health care facilities, making it a nosocomial pathogen. It is also becoming increasingly resistant to treatment with antibiotics, as of 2015. Pseudomonas aeruginosa is a frequent culprit in causing infections of the lungs, bones and joints, skin, blood and urinary tract. It is particularly dangerous in people with compromised immune systems.