In vitro activities of ICI 194008 and ICI 193428, two new cephem antimicrobial agents.

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RESUMO

The in vitro activities of two new cephem antibiotics, ICI 193428 and ICI 194008, were compared with those of cefpirome, cefotaxime, ceftazidime, and piperacillin. Essentially all strains of the family Enterobacteriaceae were inhibited by both study drugs at concentrations of less than or equal to 4 micrograms/ml. Both new cephems were comparable to ceftazidime against Pseudomonas aeruginosa (MIC for 90% of strains, 8 micrograms/ml) and were the most active agents tested against Pseudomonas maltophilia (MIC for 90% of strains, 16 micrograms/ml).

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