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Single vs replicate Real-Time PCR SARS-CoV-2 testing: Lessons learned for effective pandemic management
William R Webb1, Gauri Thapa1, Alice Tirnoveanu2
1Faculty of Medicine, Institute of Medical Sciences, Health and Social Care, Canterbury Christ Church University, Canterbury, United Kingdom.
Plos One
|July 14, 2022
Summary
Replicate PCR testing significantly reduces false negatives for SARS-CoV-2 detection. Using two tests instead of one lowers missed infections, crucial for controlling COVID-19 spread and variants.
Area of Science:
- Virology
- Molecular Diagnostics
- Epidemiology
Background:
- The COVID-19 pandemic, caused by SARS-CoV-2, necessitates accurate infection detection for public health policy.
- Current diagnostic strategies face challenges in minimizing false negative results, impacting control efforts.
Purpose of the Study:
- To compare the efficacy of single versus replicate PCR testing for SARS-CoV-2 detection.
- To assess the impact of replicate testing on reducing false negative rates in a large-scale pilot study.
Main Methods:
- One-Step Real-Time RT-PCR was utilized to detect SARS-CoV-2 RNA from 10,014 nasopharyngeal swabs.
- Samples were collected from diverse public populations, including healthcare settings and community members.
Main Results:
- Single sample Real-Time PCR testing would have resulted in approximately 19% false negatives.
- Implementing two replicate tests substantially decreases the risk of false negative reporting.
Conclusions:
- Replicate PCR testing is essential for accurate SARS-CoV-2 detection, reducing missed infections and transmission.
- This strategy is vital for managing current outbreaks, controlling variants of concern, and preparing for future pandemics.
