National Center for Infection Control, Ministry of Health, Tel Aviv, Israel; Section of Epidemiology, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel
National Center for Infection Control, Ministry of Health, Tel Aviv, Israel; Section of Epidemiology, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel.
Antimicrob Agents Chemother. 2015 Aug;59(8):5014-7. doi: 10.1128/AAC.00533-15. Epub 2015 May 18.
We aimed to examine the effects of resistance mechanisms on several resistance phenotypes among carbapenem-resistant Klebsiella pneumoniae isolates with borderline carbapenem MICs. We compared carbapenemase-negative K. pneumoniae with carbapenemase-producing K. pneumoniae (CPKP) isolates with similar MICs. CPKP isolates exhibited a marked inoculum effect and were more resistant to the bactericidal effect of meropenem. This suggests that MIC measurements alone may not be sufficient in predicting the therapeutic efficacy of carbapenems against CPKP.
我们旨在研究耐药机制对几种碳青霉烯类药物中介耐碳青霉烯类肺炎克雷伯菌分离株耐药表型的影响。我们比较了碳青霉烯酶阴性肺炎克雷伯菌和碳青霉烯酶产生肺炎克雷伯菌(CPKP)分离株,它们的 MIC 相似。CPKP 分离株表现出明显的接种体效应,对美罗培南的杀菌作用更具耐药性。这表明,单独的 MIC 测量可能不足以预测碳青霉烯类药物对 CPKP 的治疗效果。