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 mirabilis
May require Contact Precautions if highly resistant i.e. CRE (meropenem resistant)