期刊
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
卷 54, 期 6, 页码 2692-2695出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.00033-10
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资金
- AstraZeneca Pharmaceuticals, Wilmington, DE
We tested the propensities of four carbapenems to select for resistant Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii mutants by determining the mutant prevention concentrations (MPCs) for 100 clinical strains with various beta-lactam phenotypes. Among the members of the Enterobacteriaceae family and A. baumannii strains, the MPC/MIC ratios were mostly 2 to 4. In contrast, for P. aeruginosa the MPC/MIC ratios were 4 to >= 16. The MPC/MIC ratios for beta-lactamase-positive K. pneumoniae and E. coli isolates were much higher (range, 4 to > 16 mu g/ml) than those for beta-lactamase-negative strains.
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