in contrast , combinations of piperacillin and tazobactam or sulbactam plus cephalosporins ( cefoperazone , cefotaxime , ceftazidime ) or aztreonam are highly active ( both by their mics and bactericidal activity ) against tem-type ebs-beta-lactamases , but less promising for the shv-type ebs-beta-lactamases , and plasmidic cephamycinase .
C3536856
cephalosporins
C0007559
ceftazidime