Pragai, Z In-vitro selection of porin-deficient mutants of two strains of Klebsiella pneumoniae with reduced susceptibilities to meropenem, but not to imipenem. [electronic resource] - The Journal of antimicrobial chemotherapy Dec 1998 - 821-4 p. digital Publication Type: Journal Article ISSN: 0305-7453 Standard No.: 10.1093/jac/42.6.821 doi Subjects--Topical Terms: Drug Resistance, Microbial--geneticsElectrophoresis, Polyacrylamide GelHumansImipenem--pharmacologyKlebsiella Infections--microbiologyKlebsiella pneumoniae--drug effectsMeropenemMicrobial Sensitivity TestsMutationPolymerase Chain Reaction--methodsPorins--geneticsThienamycins--pharmacologybeta-Lactamases--metabolism