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中国防痨杂志 ›› 2010, Vol. 32 ›› Issue (10): 14-19.

• 论著 • 上一篇    下一篇

结核分枝杆菌对左氧氟沙星与莫西沙星的交叉耐药性及gyrA和gyrB基因突变分析

李国利1; 陈澎1; 孙昌文1; 张灵霞1; 李邦印1; 赵雁林2;   

  1. 1.解放军第309医院结核病研究室; 2.北京市结核病胸部肿瘤研究所;
  • 出版日期:2010-10-15 发布日期:2011-08-25
  • 基金资助:

    国家重大传染病防治科技重大专项资金资助(2008ZX10003-009)

The cross-resistance to levofloxacin and moxifloxacin in Mycobacteriu tuberculosis and gene mutations in gyrA and gyrB

Li Guoli1; Chen Peng1; Sun Changwen1; Zhang Lingxia1; Li Bangyin1; Zhao Yanlin2   

  1. 1.Tuberculosis Research Laboratory; The 309th Hospital of PLA; Beijing 100091; China; 2.Beijing tuberculosis and thoracic tumor research institute; Beijing 101149;
  • Online:2010-10-15 Published:2011-08-25

摘要: 目的研究结核分枝杆菌(Mycobacterium tuberculosis,MTB)对左氧氟沙星(levofloxacin,LVF)与莫西沙星(moxifloxacin,MXF)的交叉耐药性,分析gyrA和gyrB基因突变位点分布及突变位点与耐药水平的关系。方法采用改良罗氏培养基检测MTB标准菌株H37Rv、66株LVF耐药和55株LVF敏感的MTB临床分离菌株LVF和MXF的最低抑菌浓度(minimal inhibition concentra-tion,MIC)。通过PCR直接测序法测定gyrA和gyrB耐药基因片段。结果 MXF的MIC比LVF低2~4倍,MXF抗MTB菌株的活性是LVF的2~4倍。MTB标准菌株H37Rv未见gyrA和gyrB基因突变。66株LVF耐药和55株LVF敏感菌株均存在gyrA AGC95ACC(Ser→Thr)突变;55株LVF敏感菌株gyrA和gyrB基因未见其他突变。66株LVF耐药菌株中,40株(60.6%)gyrAGAC94(AAC或GGC或GCC或CAC或TAC)(Asp→Asn或Gly或Ala或His或Tyr)突变;19株(28.8%)gyrA GCG90GTG...

关键词: 分枝杆菌, 结核, 抗药性, 细菌, 氧氟沙星, 莫西沙星, gyrA, gyrB

Abstract: Objective To study the cross resistance to levofloxacin(LVF) and moxifloxcin(MXF) in M.tuberculosis(MTB),and to analyze the relationship between gyrA and gyrB gene mutations and the drug resistance level of fluoroquinolones(FQs).Methods The MICs of LVF and MXF in MTB clinical isolates were determined on Lwenstein-Jensen media.The sequences of the gyrA and gyrB genes were determined by PCR-sequencing.Results The MICs of MXF were 2 to 4 times lower than that of LVF.MXF activity against MTB was 2-4 times high...

Key words: Mycobacterium tuberculosis, drug-resistance, bacterial, levofloxacin, moxifloxcin, gyrA, gyrB

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