Fig. 2From: Antimicrobial activity of cefepime-tazobactam combination against extended spectrum beta-lactamase and/or AmpC beta-lactamase- producing gram-negative bacilliConfirmation of ESBL production by combined disc method and confirmation of AmpC production by by AmpC disc(A): Confirmation of ESBL production by the combined disc method: an ESBL-producing E. coli isolate showing ˃ 5 mm difference in zone diameter between ceftazidime (CAZ) and ceftazidime plus clavulanic acid (CCAZ).(B): Confirmation of AmpC production by AmpC disc in a K. pneumoniae isolate; there is flattening in the cefoxitin (FOX) inhibitory zone (arrow)Back to article page