Microchip RT-PCR Detection of Nasopharyngeal SARS-CoV-2 Samples.

Area of Science:

• Molecular Biology
• Virology
• Biotechnology

Background:

• Accurate diagnostic tests are crucial for controlling the spread of COVID-19.
• Current real-time PCR methods face reagent supply limitations during the pandemic.
• There is a need for rapid, resource-efficient SARS-CoV-2 detection methods.

Purpose of the Study:

• To validate a novel microchip real-time PCR assay for SARS-CoV-2 detection.
• To assess the speed, user-friendliness, and accuracy of the microchip assay.
• To compare the microchip assay's performance with established real-time RT-PCR methods.

Main Methods:

• Development and validation of a microchip real-time PCR assay using preloaded primers and probes for the SARS-CoV-2 N gene.
• Utilizing 1.2-μL reaction volumes on microchips, reducing reagent requirements by 10-fold.
• Testing with contrived reference samples and 21 clinical nasopharyngeal swab RNA extracts.

Main Results:

• The microchip real-time PCR assay detected SARS-CoV-2 in 30 minutes.
• Achieved a limit of detection of 1 copy per reaction.
• Demonstrated 100% positive and negative predictive agreement with clinical samples, comparable to CDC-approved assays.

Conclusions:

• The microchip real-time PCR assay is a rapid, accurate, and user-friendly diagnostic tool for SARS-CoV-2.
• This assay offers a significantly lower resource alternative for COVID-19 testing.
• The technology shows high sensitivity and specificity, suitable for pandemic response.