Considered resistant to all beta-lactams except for carbapenems, which are the preferred therapy.
These organisms may be reported as susceptible to Piperacillin/tazobactam or other beta-lactamase inhibitor combinations, however, treatment failures have been described.
Often resistant to fluoroquinolones, TMP/SMX, and aminoglycosides via other mechanisms.
For UTI only - may be susceptible to nitrofurantoin and fosfomycin.