Biosafety and Health (Apr 2023)

A one-step reverse-transcription recombinase aided PCR assay for the rapid and sensitive detection of human enteroviruses

  • Xiuli Sun,
  • Huanhuan Lu,
  • Yanqing Tie,
  • Mengchuan Zhao,
  • Ruiqing Zhang,
  • Zhenlu Sun,
  • Guohao Fan,
  • Fengyu Li,
  • Fengyu Tian,
  • Yaxin Hu,
  • Mengyi Zhang,
  • Xinxin Shen,
  • Xuejun Ma,
  • Zhishan Feng

Journal volume & issue
Vol. 5, no. 2
pp. 126 – 131

Abstract

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Human enteroviruses (HEVs) include many different types that cause a wide range of diseases, and an effective method of genus-level identification has therefore significant clinical implications. However, quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR), the gold-standard method, still has shortfalls in diagnostic sensitivity and timeliness. Here we established a one-step real-time reverse-transcription recombinase-aided PCR assay (RT-RAP) to detect HEV fragment within an hour. The RT-RAP assay showed a detection limit of 5 copies/μL using recombinant plasmids and was extensively verified using 15 HEV strains. Among 15 types of HEV (species A-C), the sensitivity of RT-RAP was approximately 2–8 folds lower than that of the qRT-PCR in 9 types, and no-cross reaction with other viruses was observed. RT-RAP was further applied to analyze CSF and fecal specimens; the clinical performance demonstrated that the RT-RAP and the commercial qRT-PCR kit provided consistent results. These results indicated that RT-RAP assay may be a promising approach for rapid and sensitive detection of HEV.

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