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马来西亚理科大学医院运用多重实时聚合酶链反应检测特定肠道蠕虫和原生动物

Detection of selected intestinal helminths and protozoa at Hospital Universiti Sains Malaysia using multiplex real-time PCR.

作者信息

Basuni M, Mohamed Z, Ahmad M, Zakaria N Z, Noordin R

机构信息

Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Penang, Malaysia.

出版信息

Trop Biomed. 2012 Sep;29(3):434-42.

Abstract

Intestinal parasites are the causative agents of a number of important human infections in developing countries. The objective of this study was to determine the prevalence of selected helminths and protozoan infections among patients admitted with gastrointestinal disorders at Hospital Universiti Sains Malaysia, Kelantan, Malaysia using multiplex real-time PCR. In addition microscopic examination was also performed following direct smear, zinc sulphate concentration and Kato-Katz thick smear techniques; and the presence of protozoan parasites was confirmed using trichrome and acid-fast stains. Of the 225 faecal samples analysed, 26.2% were positive for intestinal parasites by the multiplex real-time PCR, while 5.3% were positive by microscopy. As compared to microscopy, the multiplex real-time PCR detected 5.8 and 4.5 times more positives for the selected helminth and protozoan infections respectively. Among the selected helminths detected in this study, hookworm was the most prevalent by real-time PCR, while Ascaris lumbricoides was detected the most by microscopy. Meanwhile, among the selected protozoa detected in this study, Entamoeba histolytica was the most prevalent by real-time PCR, however microscopy detected equal number of cases with E. histolytica and Giardia lamblia. This study showed that real-time PCR can be used to obtain a more accurate prevalence data on intestinal helminths and protozoa.

摘要

肠道寄生虫是发展中国家许多重要人类感染的病原体。本研究的目的是使用多重实时聚合酶链反应(PCR),确定马来西亚吉兰丹州马来西亚理科大学医院因胃肠道疾病入院的患者中特定蠕虫和原生动物感染的患病率。此外,还采用直接涂片、硫酸锌浓缩法和加藤-凯茨厚涂片技术进行显微镜检查;并使用三色染色法和抗酸染色法确认原生动物寄生虫的存在。在分析的225份粪便样本中,多重实时PCR检测到26.2%的样本肠道寄生虫呈阳性,而显微镜检查阳性率为5.3%。与显微镜检查相比,多重实时PCR检测到的选定蠕虫和原生动物感染阳性率分别高出5.8倍和4.5倍。在本研究中检测到的选定蠕虫中,实时PCR检测显示钩虫最为普遍,而显微镜检查显示蛔虫最为常见。同时,在本研究中检测到的选定原生动物中,实时PCR检测显示溶组织内阿米巴最为普遍,然而显微镜检查检测到溶组织内阿米巴和蓝氏贾第鞭毛虫的病例数相同。本研究表明,实时PCR可用于获得关于肠道蠕虫和原生动物更准确的患病率数据。

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