Hi, Thanks for posting in HCM. Pseudomonas aeruginosa is a common gram-negative rod-shaped bacterium. It is a prototypical multidrug resistant (MDR) pathogen that is recognised for its ubiquity and its association with serious illnesses – especially nosocomial infections such as ventilator-associated pneumonia and various sepsis syndromes. Proteus vulgaris is a rod-shaped, nitrate-reducing, indole+ and catalase-positive, hydrogen sulfide-producing, Gram-negative bacterium. It is an opportunistic pathogen of humans. It is known to cause wound infections and urinary tract infections. Hence, the description you have provided fits more in favor of Proteus vulgaris. Hope the information provided would be helpful. All the best.