中国寄生虫学与寄生虫病杂志

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巢式PCR技术在输入性卵形疟诊断中的应用研究

黄炳成,徐超,李瑾,肖婷,尹昆,刘功振,王卫艳,赵桂华,魏艳彬,王用斌,赵长磊,魏庆宽*   

  1. 山东省医学科学院,山东省寄生虫病防治研究所,山东省疟疾诊断参比实验室,济宁 272033
  • 出版日期:2015-02-28 发布日期:2015-05-04

pplication of Nested PCR in the Diagnosis of Imported Plasmodium Ovale Infection

HUANG Bing-cheng,XU Chao,LI Jin,XIAO Ting,YIN Kun,LIU Gong-zhen,WANG Wei-yan,ZHAO Gui-hua,WEI Yan-bin,WANG Yong-bin,ZHAO Chang-lei,WEI Qing-kuan*   

  1. Shandong Academy of Medical Sciences;Shandong Institute of Parasitic Diseases;Shandong Provincial Reference Laboratory for Malaria Diagnosis,Jining 272033,China
  • Online:2015-02-28 Published:2015-05-04

摘要:

目的  应用巢式PCR扩增小亚单位核糖体核糖核酸(18S rRNA)基因确诊卵形疟原虫感染。  方法 采集2012-2013年山东省疟疾患者全血和滤纸血样,吉氏染色镜检观察血膜疟原虫形态并鉴定虫种。提取血样中DNA,根据疟原虫18S rRNA基因以属和种特异性引物进行巢式PCR扩增,筛查卵形疟阳性标本并进行测序验证。  结果  2012和2013年山东省共筛查到7例输入性卵形疟原虫感染病例。巢式PCR扩增7份血样均在800 bp处出现卵形疟原虫特异性单一条带,Blast比对表明产物序列与GenBank卵形疟参考序列一致。  结论  经巢式PCR方法确诊了2012和2013年山东省7例输入性卵形疟病例。

关键词: 卵形疟原虫, 小亚单位核糖体核糖核酸, 巢式PCR, 输入性疟疾

Abstract:

Objective  To identity Plasmodium ovale infection by 18S rRNA gene nested PCR.  Methods  Whole blood and filter paper blood samples of malaria patients in Shandong Province were collected during 2012-2013. The parasites were observed under a microscope with Giemsa staining. The genome DNA of blood samples were extracted as PCR templates. Genus- and species-specific primers were designed according to the Plasmodium 18S rRNA gene sequences. Plasmodium ovale-positive specimens were identified by nested PCR as well as verified by sequencing.  Results  There were 7 imported cases of P. ovale infection in the province during 2012-2013. Nested PCR results showed that the P. ovale specific band (800 bp) was amplified in all the 7 specimens. Blast results indicated that the PCR products were consistent with the Plasmodium ovale reference sequence in GenBank.  Conclusion  Seven imported cases of ovale malaria in Shandong Province in 2012-2013 are confirmed by nested PCR.

Key words: Plasmodium ovale, Small subunit ribosome RNA, Nested PCR, Imported malaria