检验医学 ›› 2021, Vol. 36 ›› Issue (6): 650-655.DOI: 10.3969/j.issn.1673-8640.2021.06.016

• 技术研究与评价·论著 • 上一篇    下一篇

细菌超声分散计数仪在结核分枝杆菌最小抑菌浓度检测中的应用

郁晨蕾, 江渊, 李静, 王莉莉, 陈炜, 沈旭晖, 张阳奕()   

  1. 上海市疾病预防控制中心结核病检测实验室,上海 200336
  • 收稿日期:2020-04-23 出版日期:2021-06-30 发布日期:2021-06-30
  • 通讯作者: 张阳奕
  • 作者简介:张阳奕,E-mail:zhangyangyi@scdc.sh.cn
    郁晨蕾,女,1988年生,学士,主管技师,主要从事结核病耐药检测研究。
  • 基金资助:
    国家重点研发计划(2017YFD0500301);上海市卫生健康委员会卫生行业临床研究专项(20194Y0169)

Application of BAC spreader for minimum inhibitory concentration determination in Mycobacterium tuberculosis

YU Chenlei, JIANG Yuan, LI Jing, WANG Lili, CHEN Wei, SHEN Xuhui, ZHANG Yangyi()   

  1. Tuberculosis Reference Laboratory,Shanghai Municipal Center for Disease Control and Prevention,Shanghai 200336,China
  • Received:2020-04-23 Online:2021-06-30 Published:2021-06-30
  • Contact: ZHANG Yangyi

摘要:

目的 评估细菌超声分散计数仪在结核分枝杆菌(MTB)最小抑菌浓度(MIC)检测中的应用价值。方法 应用分散仪法和玻璃珠振荡研磨法2种细菌分散定量方法分别制备MTB标准菌株H37Rv(ATCC 27294)和28株MTB临床分离株菌悬液,接种于TREK Sensititre MYCOTB药敏板(简称MYCOTB),进行体外药物敏感性试验。通过肉眼观察、抗酸染色镜检、药敏板中菌落形态和药物敏感性试验结果,评估细菌超声分散计数仪在MIC测定中的应用价值。结果 通过肉眼观察和抗酸染色镜检,发现细菌超声分散计数仪制备的菌悬液分散效果更好。药物敏感性试验结果显示,2种方法符合率为100%。结论 细菌超声分散计数仪可以提升制备MTB菌悬液的自动化程度,尤其在药物敏感性试验类定量试验中,可减少人为因素引起的定量误差,有利于检测的标准化和重现性。

关键词: 结核分枝杆菌, 超声分散计数仪, 最小抑菌浓度, 体外药物敏感性试验

Abstract:

Objective To evaluate BAC spreader for minimum inhibitory concentration(MIC) determination in Mycobacterium tuberculosis(MTB). Methods BAC spreader and glass bead grinding were used respectively to prepare bacterial suspensions of MTB ATCC 27294 standard strain H37Rv and 28 clinical MTB strains,and these bacterial suspensions were inoculated into TREK Sensititre MYCOTB well for drug susceptibility test. The performance of BAC spreader on MTB MIC was assessed by visual observation,acid-fast staining,colonial morphology in MYCOTB well and drug susceptibility test results. The role of BAC spreader for MIC determination in MTB was evaluated. Results The results of visual observation and acid-fast staining showed that the bacterial suspensions of BAC spreader were dispersed. The drug susceptibility test results showed that the consistency rate of the 2 methods was 100%. Conclusions The BAC spreader can improve the automation of MTB bacterial suspension preparation,particular in quantitative test as MIC drug susceptibility test,reducing the quantitative error caused by human factors,which is beneficial to the determination standardization and reproducibility.

Key words: Mycobacterium tuberculosis, BAC spreader, Minimum inhibitory concentration, Drug susceptibility test

中图分类号: