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高通量多重 PCR 和基于 Luminex 珠子的探针检测七种肠道寄生虫。

High throughput multiplex PCR and probe-based detection with Luminex beads for seven intestinal parasites.

机构信息

Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA22908, USA.

出版信息

Am J Trop Med Hyg. 2011 Feb;84(2):332-7. doi: 10.4269/ajtmh.2011.10-0461.

Abstract

Polymerase chain reaction (PCR) assays for intestinal parasites are increasingly being used on fecal DNA samples for enhanced specificity and sensitivity of detection. Comparison of these tests against microscopy and copro-antigen detection has been favorable, and substitution of PCR-based assays for the ova and parasite stool examination is a foreseeable goal for the near future. One challenge is the diverse list of protozoan and helminth parasites. Several existing real-time PCR assays for the major intestinal parasites-Cryptosporidium spp., Giardia intestinalis, Entamoeba histolytica, Ancylostoma duodenale, Ascaris lumbricoides, Necator americanus, and Strongyloides stercoralis-were adapted into a high throughput protocol. The assay involves two multiplex PCR reactions, one with specific primers for the protozoa and one with specific primers for the helminths, after which PCR products are hybridized to beads linked to internal oligonucleotide probes and detected on a Luminex platform. When compared with the parent multiplex real-time PCR assays, this multiplex PCR-bead assay afforded between 83% and 100% sensitivity and specificity on a total of 319 clinical specimens. In conclusion, this multiplex PCR-bead protocol provides a sensitive diagnostic screen for a large panel of intestinal parasites.

摘要

聚合酶链反应 (PCR) 检测粪便 DNA 样本中的肠道寄生虫,在提高检测特异性和灵敏度方面的应用越来越广泛。与显微镜和粪便抗原检测相比,这些检测方法具有优势,并且基于 PCR 的检测方法替代粪便虫卵和寄生虫检查,是不久的将来可以预见的目标。一个挑战是原虫和蠕虫寄生虫种类繁多。现有的几种针对主要肠道寄生虫的实时 PCR 检测方法,包括隐孢子虫属、蓝氏贾第鞭毛虫、溶组织内阿米巴、十二指肠钩口线虫、蛔虫、美洲板口线虫和粪类圆线虫,已被改编为高通量方案。该检测方法涉及两个多重 PCR 反应,一个针对原虫,一个针对蠕虫,然后将 PCR 产物与连接内部寡核苷酸探针的珠子杂交,并在 Luminex 平台上进行检测。与原始的多重实时 PCR 检测相比,该多重 PCR-珠检测在总共 319 份临床样本中具有 83%至 100%的敏感性和特异性。总之,这种多重 PCR-珠方案为一组大型肠道寄生虫提供了敏感的诊断筛查。

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