mics of temocillin , carbenicillin , ticarcillin , mezlocillin , piperacillin and ampicillin were determined for mutant series of enterobacter cloacae , citrobacter freundii , proteus vulgaris , morganella morganii and serratia marcescens with inducible , stably derepressed or basal expression of chromosomal class i beta-lactamases .
C0025893
mezlocillin
C0002680
ampicillin