Proteus mirabilis

General Susceptibility

"Pansusceptible" isolates are sensitive to:

  • Ampicillin

  • Cephalosporins including first generation


  • Fluoroquinolones

  • Broader spectrum beta-lactams

May be resistant to third generation cephalosporins (ESBLs), and rarely to carbapenems (carbapenemase enzymes).

Use fosfomycin and nitrofurantoin for UTI only.

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