General Susceptibility

Almost always susceptible to:

  •  Aminoglycosides

  •  TMP-SMX

  •  Fluoroquinolones

  •  Carbapenems

  •  Aztreonam

  •  Tigecycline

  •  Colistin

Intrinsically resistant to ampicillin.

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

Use fosfomycin and nitrofurantoin for UTI only, when confirmed susceptible.