Considered resistant to all beta-lactams except for carbapenems, which are the preferred therapy.
These organisms may be reported as susceptible to Pip-Tazo 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.