Antibiotic | ESBL | AmpC |
Third-generation cephalosporins | – | – |
Cefepime | – | +++ |
Fluoroquinolones | +/– | + |
Piperacillin/tazobactam | +/– | +/– |
Tigecycline | ++ | ++ |
Carbapenem | +++ | +++ |
ESBL: extended-spectrum β-lactamases; AmpC: Ampicillin resistance gene C. –: not effective; +: effective; ++: more effective; +++: most effective; +/–: effective against some, but not all, β-lactamases.