of the remaining agents tested against the b. fragilis group , cefoxitin ( which required 64 mug/ml to inhibit 90 % of the strains ) was the most active , followed by cefoperazone ( 128 mug/ml ) , cefotaxime ( 128 mug/ml ) , moxalactam ( 128 mug/ml ) , ceftizoxime ( 256 mug/ml ) , and ceftazidime ( > 256 mug/ml ) .
C0007554
cefotaxime
C0007560
ceftizoxime