Prevalence and transmission of pyrazinamide resistant Mycobacterium tuberculosis in China.

Prevalence and transmission of pyrazinamide resistant Mycobacterium tuberculosis in China.
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DOI:
10.1016/j.tube.2016.02.008
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发表时间:
2016-05
期刊:
Tuberculosis (Edinburgh, Scotland)
影响因子:
--
通讯作者:
Gao Q
Gao Q
中科院分区:
其他
文献类型:
--
作者:
Xu P;Wu J;Yang C;Luo T;Shen X;Zhang Y;Nsofor CA;Zhu G;Gicquel B;Gao Q

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吡嗪酰胺(Pyrazinamide, PZA)是一种重要的一线抗结核药物,但国内关于PZA耐药率(PZA- r)的数据相对较少。从2009年6月至2012年6月,我们从中国5个地区选择493株PZA-R进行pncA基因测序研究。结果显示,PZA-R率在全感菌中为1.0%(2/196),在异烟肼(INH)单耐菌中为3.1%(4/130),在利福平(RIF)单耐菌中为14.0%(6/43),在多药耐药(MDR)菌株中为43.5%(54/124)。发现耐多药结核病、RIF单药耐药和再治疗是PZA-R的危险因素。新诊断的PZA-R结核患者和具有相同pncA突变的聚集性分离株表明,PZA-R分离株的传播在PZA-R结核的出现中起重要作用。结果提示,有必要对MDR分离株进行PZA药敏试验,并相应调整治疗方案。
Pyrazinamide (PZA) is an important first-line anti-tuberculosis drug, however, there are relatively few available data on PZA resistant (PZA-R) rate in China. From June 2009 to June 2012, we selected 493 isolates from five field settings in China to investigate PZA-R by pncA gene sequencing. The result showed that PZA-R rate was 1.0% (2/196) among pan-susceptible isolates, 3.1% (4/130) among isoniazid (INH) mono-resistant isolates, 14.0% (6/43) among rifampin (RIF) mono-resistant isolates and 43.5% (54/124) among multidrug resistant (MDR) isolates. MDR tuberculosis (TB), RIF mono-resistance, and retreatment were found to be risk factors for PZA-R. Newly diagnosed PZA-R TB patients and clustered isolates with identical pncA mutations indicate that transmission of PZA-R isolates plays an important role in emergence of PZA-R TB. The results suggest that, it is necessary to conduct PZA susceptibility test among MDR isolates and modify the treatment regimens accordingly.
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