for 156 beta-lactamase-negative isolates , mic50 values of cefoperazone , cefpimizole , and cefamandole were 4 , 8 , and 16 times greater than those of moxalactam and cefotaxime ( 0.06 micrograms/ml ) .
C0007552
cefoperazone
C0007541
cefamandole