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Related Concept Videos

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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Detection and Genogrouping of Noroviruses from Children's Stools By Taqman One-step RT-PCR
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Norovirus detection in shellfish using two Real-Time RT-PCR methods.

Elisabetta Suffredini1, Tiziana Pepe, Iole Ventrone

  • 1Istituto Superiore di Sanità, Dipartimento di Sanità Pubblica Veterinaria e Sicurezza Alimentare, Roma, Italy. alisabetta.suffredini@iss.it

The New Microbiologica
|February 24, 2011
PubMed
Summary

Two real-time RT-PCR methods were evaluated for Norovirus (NoV) detection in shellfish. An in-house method effectively detected GI and GII NoV genotypes, outperforming a commercial kit, especially for GI strains.

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Area of Science:

  • Food safety
  • Virology
  • Molecular diagnostics

Background:

  • Shellfish consumption poses a risk for viral disease transmission.
  • Norovirus (NoV) is a primary cause of viral gastroenteritis globally.
  • Accurate detection of NoV in shellfish is crucial for public health.

Purpose of the Study:

  • To compare the efficacy of an in-house real-time RT-PCR assay versus a commercial kit for detecting Norovirus GI and GII in shellfish.
  • To assess the performance of these methods using both synthetic RNA and naturally contaminated samples.
  • To determine the prevalence of Norovirus contamination in analyzed shellfish.

Main Methods:

  • Real-time reverse transcription-polymerase chain reaction (RT-PCR) assays.
  • Utilized a Norovirus Reference Panel (NRP) with synthetic RNA and naturally contaminated mussel samples.
  • Statistical analysis to compare method performance.

Main Results:

  • The in-house RT-PCR method demonstrated superior performance, detecting all GI and GII genotypes in the NRP, unlike the commercial kit which struggled with GI sequences.
  • No significant difference was observed between methods for naturally contaminated shellfish, where GI and GII were often co-detected.
  • A substantial 34.4% of shellfish samples were contaminated with Norovirus, predominantly GII strains.

Conclusions:

  • The in-house real-time RT-PCR is a reliable method for detecting Norovirus GI and GII in shellfish, offering genotype differentiation.
  • While both methods detected NoV in shellfish, the in-house assay provides greater discriminatory power.
  • High Norovirus contamination rates in shellfish highlight the need for robust monitoring and detection strategies.