中国血吸虫病防治杂志 ›› 2019, Vol. 31 ›› Issue (2): 165-168.

• 实验研究 • 上一篇    下一篇

改良加藤厚涂片法和PCR法检测华支睾吸虫感染的 效果比较

徐梦,尹建海,曹胜魁,曹建平,张小凡,沈玉娟*   

  1. 中国疾病预防控制中心寄生虫病预防控制所、国家热带病研究中心、世界卫生组织热带病合作中心、科技部国家级热带病国际联合研究中心、国家卫生健康委员会寄生虫病原与媒介生物学重点实验室(上海 200025)
  • 出版日期:2019-05-24 发布日期:2019-05-26
  • 通讯作者: 沈玉娟
  • 作者简介:徐梦,女,硕士研究生。研究方向:寄生虫分子流行病学及寄生虫与肠道菌群相互作用关系
  • 基金资助:
    国家科技重大专项(2018ZX10713001?004);国家公益性卫生行业科研专项(201502021)

Comparison of efficiency of Kato-Katz technique and PCR assay for detecting Clonorchis sinensis infection

XU Meng, YIN Jian-Hai , CAO Sheng-Kui, CAO Jian-Ping, ZHANG Xiao-Fan, SHEN Yu-Juan*   

  1. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, National Health Commission, Shanghai 200025, China
  • Online:2019-05-24 Published:2019-05-26
  • Contact: SHEN Yu?Juan

摘要: 目的 比较改良加藤厚涂片法(Kato?Katz法)和PCR法对现场人群粪便样本中华支睾吸虫感染的检出率,为华支睾吸虫感染检测方法的选择提供依据。方法 在2016年广西壮族自治区藤县人体华支睾吸虫感染流行病学调查的基础上,随机抽取133份粪便样本,-20 ℃保存。分别采用Kato?Katz法(1粪3检)和PCR法检测华支睾吸虫感染,比较两种方法对华支睾吸虫感染的检出率,采用Kappa分析评价两种检测方法结果的一致性。结果 133份人群粪便样本中,华支睾吸虫感染总检出率为77.44%(103/133),其中Kato?Katz法检出率为57.14%(76/133),PCR法检出率为70.68%(93/133), PCR法检出率显著高于Kato?Katz法([χ2] = 26.15,P <0.01)。76份Kato?Katz法阳性粪便样本中,88.16%(67/76)的样本PCR法扩增阳性;57份Kato?Katz法阴性样本中,47.37%(27/57)的样本PCR法扩增阳性。PCR法对每g粪便虫卵数(EPG)> 1 000的粪便样本中华支睾吸虫感染的检出率(94.7%,18/19)高于EPG < 1 000的样本(85.96%,49/57),但差异无统计学意义([χ2] = 1.05,P = 0.436)。两种方法检出率一致性检验结果一般(Kappa = 0.73)。结论 PCR法对人群华支睾吸虫感染的检出率显著高于Kato?Katz法。建议在华支睾吸虫感染度较轻的地区,采用Kato?Katz法结合PCR法进行检测,以提高检出率。

关键词: 华支睾吸虫, 改良加藤厚涂片法, PCR法, 比较研究

Abstract: Objective To compare the performance of modified Kato?Katz thick smear method (KK method) and PCR assay in field detection of Clonorchis sinensis in human fecal samples, which provides insight into the selection of tools for detecting C. sinensis. Methods Based on the epidemiological investigation of human C. sinensis infections in Tengxian County of Guangxi Zhuang Autonomous Region in 2016, a total of 133 fecal samples were randomly selected and stored at -20 ℃. All fecal samples were detected for C. sinensis infection using KK method and PCR assay, and the detection rate was compared between the two techniques. In addition, Kappa test was used to evaluate the consistency between the two methods. Results Among all fecal samples, the overall detection rate of C. sinensis was 77.44% (103/133), and the detection rate was significantly higher by PCR assay (70.68%, 93/133) than by KK method (57.14%, 76/133) ([χ2] = 26.15, P < 0.01). There were 88.16% (67/76) of the microscopy?positive fecal samples positive for PCR assay, and 47.37% (27/57) of the microscopy?negative fecal samples positive for PCR assay. The detection rate of C. sinensis by PCR assay (94.74%, 18/19) was higher in fecal samples with EPG of > 1 000 than in samples with EPG of < 1 000 (85.96%, 49/57) ([χ2] = 1.05, P = 0.436). The consistency of the detection rate of C. sinensis was moderate between the KK method and PCR assay (Kappa value = 0.73). Conclusions The detection rate of C. sinensis by PCR assay is significantly higher than by KK method. In low?endemic areas of C. sinensis infections, the combination of KK method and PCR assay is suggested, so as to improve the detection rate.

Key words: Clonorchis sinensis, Kato?Katz thick smear method, PCR assay, Comparative study

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