against escherichia coli , salmonella , enterobacter , proteus mirabilis and indole-positive proteus ceftazidime , with mic90 of < or = 0.25 mg/l , was more active than cephalothin , cefoperazone and cefuroxime but less active than cefotaxime and ceftriaxone klebsiella pneumoniae , serratia , acinetobacter and citrobacter were inhibited at higher concentrations ( mic90 1-4 mg/l ) .
C0007554
cefotaxime
C0007561
ceftriaxone