Proteus mirabilis is a rapid hydrolyzer of urea (center tube pictured here). The tube on the far right was inoculated with a urease negative organism and the tube on the far left was uninoculated.

With no improvement, we took him back less than two weeks later. They did a test and said that he has an infection due to something called proteus.

Renal damage increased with age and recurrences of acute pyelonephritis. was the most frequently isolated agent (89.9%), followed by Proteus mirabilis (3.6%) and Klebsiella oxytoca.