中国寄生虫学与寄生虫病杂志 ›› 1999, Vol. 17 ›› Issue (2): 14-114.

• 实验研究 • 上一篇    下一篇

微小隐孢子虫DNA探针的制备

郭步平1,张建斌 1,连德润2
  

  1. 1 长治医学院寄生虫学教研室 长治0460002 中山医科大学寄生虫病研究所 广州510089
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-04-30 发布日期:1999-04-30

PREPARATION OF DNA PROBE FOR CRYPTOSPORIDIUM PARVUM

GUO Buping 1;ZHANG Jianbin 1;LIAN Derun 2

  

  1. 1 Department of parasitology;Changzhi Medical College;Changzhi 046000 2 Institute of parasitology;Sun Yat Sen University of Medical Sciences;Guangzhou 510089
  • Received:1900-01-01 Revised:1900-01-01 Online:1999-04-30 Published:1999-04-30

摘要:   目的:制备一种高度特异敏感的隐孢子虫检测探针。方法:应用聚合酶链反应(PCR)扩增微小隐孢子虫的一段核苷酸片段,扩增产物452bpDNA用半抗原地高辛标记制备成探针。结果:经敏感性试验,该探针可检测2pg水平的隐孢子虫DNA。用该探针与隐孢子虫DNA和溶组织内阿米巴、贾第虫、大肠杆菌及痢疾杆菌等相关生物的DNA和隐孢子虫宿主的DNA进行斑点杂交试验,该探针只与隐孢子虫DNA杂交。结论:该探针具有高度特异性和较高敏感性。

关键词: 微小隐孢子虫, DNA探针, 杂交

Abstract:  AIM: To prepare a probe with high specificity and sensitivity for the detection of Cryptosporidium parvum. METHODS: Using PCR method, a fragment from the DNA of C.parvum was amplified . The PCR product, 452 bp DNA, was labeled with hapten digoxigenin.RESULTS: Examination of sensitivity showed that the DNA probe could detect as low as 2 pg DNA from C.parvum. The dot blot hybridizition assay showed that the probe hybridized with the DNA of C.parvum, but not hybridized with DNA of E.histolytica, G.lamblia, E.coli and D.bacilli. CONCLUSION: The probe was highly specific and sensitive for the detection of C.parvum.

Key words: Cryptosporidium parvum, DNA probe, hybridization