Li Xinying, Zhao Xilin, Drlica Karl
Public Health Research Institute, New York, New York 10016, USA.
Antimicrob Agents Chemother. 2002 Feb;46(2):522-4. doi: 10.1128/AAC.46.2.522-524.2002.
With Streptococcus pneumoniae, moxifloxacin was 4- and 10-fold more effective than levofloxacin at restricting selection of resistant mutants and at killing resistant mutants, respectively. The selection frequency for first-step topoisomerase mutants was 1,000 times lower for moxifloxacin than for levofloxacin; this difference was lost when second-step mutants were selected.
对于肺炎链球菌,莫西沙星在限制耐药突变体的选择以及杀灭耐药突变体方面分别比左氧氟沙星有效4倍和10倍。第一步拓扑异构酶突变体的选择频率,莫西沙星比左氧氟沙星低1000倍;但在选择第二步突变体时,这种差异消失了。