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GTR Home > > SARS-CoV-2 Infection Molecular rRT-PCR Test

Methodology

Methodology

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Molecular Genetics
RRNA analysis
RT-PCR

Test development

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Not provided

Test procedure

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The Coronavirus (SARS-CoV-2) Real Time RT-PCR Nucleic Acid Detection Kit is based on the PCR method, which uses primers to amplify three specific regions within the novel coronavirus (SARS-CoV-2) nucleocapsid protein N gene, and a fluorescent probe to detect amplification. The kit includes 3 primer-probe sets corresponding to those used in the CDC 2019-Novel Coronavirus (2019-nCoV) Real-Time RT-PCR Diagnostic Panel (cat no. 2019-nCoVEUA-01). The oligonucleotide primers and probes for detection of SARS-CoV-2 RNA are designed for a multiplex assay that amplify and detect the N1 and N2 gene regions of the virus specific to SARS-CoV-2 RNA. An additional internal control and probe set detects the RNaseP in human nucleic acid to confirm that the amplification process has proceeded correctly. Virus from nasopharyngeal or nasal swabs are lysed to release encapsulated viral RNA and human DNA. The RNA from the virus is reverse transcribed to cDNA and subsequently amplified by multiplex PCR. In the process, the probe anneals to a specific target sequence located between the forward and reverse primers. During the extension phase of the PCR cycle, the 5' exonuclease activity of Taq polymerase degrades the probe, causing the reporter probe to separate from the quencher probe, generating a fluorescent signal which increases and is monitored with each PCR cycle.

Citations

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Clinical resources

Practice guidelines

  • NICE, 2024
    UK NICE Guideline NG191, COVID-19 rapid guideline: managing COVID-19, 2024

Consumer resources

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