نتایج جستجو برای: cefpirome

تعداد نتایج: 156  

Journal: :Antimicrobial agents and chemotherapy 1999
T Köhler M Michea-Hamzehpour S F Epp J C Pechere

While meropenem MICs were strongly influenced by the presence or absence of the MexAB-OprM efflux pump in both OprD-proficient and -deficient strain backgrounds, MICs of imipenem and of ER-35786 remained unchanged, demonstrating that meropenem is a substrate of MexAB-OprM but not imipenem and ER-35786. In vitro, all three carbapenems selected loss of OprD as a first mechanism of resistance. How...

Journal: :Antimicrobial agents and chemotherapy 2009
Susanne Paukner Lars Hesse Andrej Prezelj Tomaz Solmajer Uros Urleb

LK-157 is a novel tricyclic carbapenem with potent activity against class A and class C beta-lactamases. When tested against the purified TEM-1 and SHV-1 enzymes, LK-157 exhibited 50% inhibitory concentrations (IC(50)s) in the ranges of the clavulanic acid and tazobactam IC(50)s (55 nM and 151 nM, respectively). Moreover, LK-157 significantly inhibited AmpC beta-lactamase (IC(50), 62 nM), as LK...

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