Flamm Robert K, Sader Helio S, Farrell David J, Jones Ronald N
JMI Laboratories, North Liberty, Iowa, USA.
Antimicrob Agents Chemother. 2014;58(4):2468-71. doi: 10.1128/AAC.02557-13. Epub 2014 Feb 10.
Streptococcus pneumoniae isolates (6,958) were collected from patients at 163 U.S. medical centers during 2009 through 2012. Isolates were evaluated for multidrug resistance (MDR) to penicillin, ceftriaxone, erythromycin, tetracycline, trimethoprim-sulfamethoxazole, and levofloxacin. Ceftaroline was 16-fold more potent than ceftriaxone (MIC50/MIC90, ≤0.25/2 μg/ml) against all isolates. For MDR isolates (35.2% of tested strains), ceftaroline (MIC50/MIC90, 0.06/0.25 μg/ml; 100.0% susceptible) was the most active agent tested, being 8-fold more potent than ceftriaxone (MIC50/MIC90, 0.5/2 μg/ml) and 16-fold more potent than penicillin (MIC50/MIC90, 1/4 μg/ml).
2009年至2012年期间,从美国163家医疗中心的患者中收集了6958株肺炎链球菌分离株。对分离株进行了对青霉素、头孢曲松、红霉素、四环素、甲氧苄啶-磺胺甲恶唑和左氧氟沙星的多重耐药性(MDR)评估。头孢洛林对所有分离株的效力比头孢曲松高16倍(MIC50/MIC90,≤0.25/2μg/ml)。对于多重耐药分离株(占测试菌株的35.2%),头孢洛林(MIC50/MIC90,0.06/0.25μg/ml;100.0%敏感)是测试的最具活性的药物,其效力比头孢曲松(MIC50/MIC90,0.5/2μg/ml)高8倍,比青霉素(MIC50/MIC90,1/4μg/ml)高16倍。