Proteus mirabilis

Proteus mirabilis


Standard Precautions

General Information

Non-fermenting gram negative rod, of the Enterobacteriaceae family

GI flora, especially in hospitalized patients.

Infection usually in nosocomial setting.

Most commonly UTI, but also causes other nosocomial infections.

Association with struvite stones and persistence within stones accounts for recurrent infection.

Proteus vulgaris species is more resistant to antimicrobials than Proteus mirabilis.

P. mirabilis may produce AmpC beta-lactamases and cause inducible resistance while P. vulgaris may produce CumA beta-lactamases which hydrolyzes cephalosporins.