Laboratory Evaluation of a SARS-CoV-2 RT-LAMP Test

Area of Science:

• Molecular Diagnostics
• Infectious Disease Research
• Public Health

Background:

• Accessible molecular diagnostic tests for SARS-CoV-2 are crucial, especially in low- and middle-income countries.
• Reverse transcription loop-mediated isothermal amplification (RT-LAMP) presents a promising alternative due to its minimal infrastructure requirements.

Purpose of the Study:

• To evaluate the diagnostic performance of a SARS-CoV-2 RT-LAMP assay.
• To assess its suitability as an alternative molecular diagnostic tool in resource-limited settings.

Main Methods:

• The study utilized RT-PCR-confirmed clinical specimens from COVID-19-positive (n=55) and negative (n=55) patients.
• Diagnostic performance metrics including sensitivity, specificity, and accuracy were calculated for the RT-LAMP test.

Main Results:

• The RT-LAMP assay demonstrated high sensitivity (97.2%) and perfect specificity (100%).
• Positive predictive value was 100%, negative predictive value was 93.2%, and diagnostic accuracy was 96.4%.
• Excellent agreement (κ-value: 0.92) was observed between RT-LAMP and RT-PCR.

Conclusions:

• The evaluated SARS-CoV-2 RT-LAMP assay exhibits strong diagnostic performance.
• This RT-LAMP test is a viable and attractive molecular diagnostic option for COVID-19 in resource-limited settings.