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Related Concept Videos

PCR - Polymerase Chain Reaction01:32

PCR - Polymerase Chain Reaction

Overview
Real Time RT-PCR02:57

Real Time RT-PCR

Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...

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Related Experiment Video

Updated: Jul 12, 2026

Detection and Genogrouping of Noroviruses from Children's Stools By Taqman One-step RT-PCR
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Genogroup-Specific Multiplex Reverse Transcriptase Loop-Mediated Isothermal Amplification Assay for Point-of-Care

Wahedul Karim Ansari1,2,3,4, Mi-Ran Seo5, Yeun-Jun Chung1,2,3

  • 1Department of Medical Sciences, The Catholic University of Korea, Seoul 06591, Republic of Korea.

Diagnostics (Basel, Switzerland)
|August 14, 2025
PubMed
Summary

A new multiplex assay rapidly detects norovirus genogroups I and II (GI and GII) for point-of-care testing. This tool offers fast, accurate results for outbreak control and public health surveillance.

Keywords:
RT-LAMPgastroenteritisgenogroupsnorovirus

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Area of Science:

  • Molecular Diagnostics
  • Virology
  • Public Health

Background:

  • Norovirus causes significant global gastroenteritis outbreaks.
  • Rapid diagnostics are crucial for controlling highly infectious norovirus transmission.
  • Point-of-care testing (POCT) is vital for timely outbreak management.

Purpose of the Study:

  • Develop a genogroup-specific multiplex reverse transcriptase loop-mediated isothermal amplification assay.
  • Detect human norovirus genogroups I (GI) and II (GII) for POCT applications.

Main Methods:

  • Designed multiplex assays with specific primers for GI and GII genotypes.
  • Optimized reaction conditions including temperature, MgSO4, dNTPs, and enzyme concentrations.
  • Validated assay performance using real-time monitoring and a portable isothermal detection device for on-site testing.

Main Results:

  • Assays detected down to 10^2-10^3 copies/reaction with high specificity against 39 other pathogens.
  • Achieved rapid detection: GI in 10-12 min, GII in 12-17 min.
  • On-site testing confirmed detection within 15 min, with total results under 1 hour including sample prep.

Conclusions:

  • Developed a rapid, reliable, and scalable method for norovirus detection.
  • The assay is suitable for point-of-care testing (POCT) in clinical diagnosis.
  • The method supports effective public health surveillance and outbreak control.