Rapid detection of SARS-CoV-2 by pulse-controlled amplification (PCA)

Area of Science:

• Molecular Biology
• Virology
• Biotechnology

Background:

• Rapid identification of SARS-CoV-2 is critical for pandemic control.
• Current laboratory methods like RT-qPCR are time-consuming due to sample transport and processing.
• There is a need for faster diagnostic methods for effective outbreak management.

Purpose of the Study:

• To introduce a novel nucleic acid-based test format: pulse controlled amplification (PCA).
• To evaluate the PCA prototype for direct detection of SARS-CoV-2 from swab samples.
• To assess the speed, sensitivity, and potential for point-of-care application of the PCA test.

Main Methods:

• Development of a prototype PCA test for simultaneous detection of up to eight swab samples.
• Direct detection of SARS-CoV-2 without requiring RNA extraction.
• Evaluation of test performance, including time to result and sensitivity.

Main Results:

• The PCA prototype detected SARS-CoV-2 directly from swab samples in under 25 minutes.
• Achieved 100% sensitivity for samples with a viral load of ≥ 1.6 × 10^3 copies/μl.
• Demonstrated simultaneous testing of up to eight samples.

Conclusions:

• Pulse controlled amplification is a rapid and sensitive method for SARS-CoV-2 detection.
• The PCA test eliminates the need for RNA extraction, significantly reducing testing time.
• This novel principle holds promise for developing rapid, point-of-care diagnostic solutions for infectious diseases.