for penicillinase-positive strains , a large inoculum ( 10 ( 6 ) cfu ) increased the mic greater than or equal to 16-fold for benzylpenicillin , piperacillin , azlocillin , and mezlocillin and increased the mic greater than or equal to 8-fold for ampicillin , cefoperazone , ceftazidime , cefonicid , and cefamandole .
C0004499
azlocillin
C0002680
ampicillin