of all the injectable preparations of antibiotics , cephem antibiotics of the third generation showed the most potent antibacterial effects against k. pneumoniae , and their mic90 's were lower than 0.10 microgram/ml for czx , 0.20 microgram/ml for ctx , 0.39 microgram/ml for cmx , and 0.78 microgram/ml for lmox , while mic90 's of cpz was 6.25 micrograms/ml , which was equal to that of cmz .
C0007554
ctx
C0007549
cmx