LAMP-Based Point-of-Care Nucleic Acid-Based Detection Method Can Be Useful for Quick Decision-Making for Diagnosis of Acute COVID-19 Emergency Cases in Hospital Settings

Abstract

Real-time RT-PCR is used as a gold standard method for the diagnosis of COVID-19. Since real-time RT PCR is nucleic acid-based, it is a highly sensitive and specific test. However, this test takes 4–8 h to generate results and, in emergency settings, this delay may prove fatal for certain patients. The frequent surge in COVID cases increases patient load in emergency settings. Thus, a nucleic acid-based rapid POC test is required that can generate results quickly as well as being comparable to real-time RT-PCR. In this study, comparison of real-time RT-PCR was carried out using the rapid nucleic acid-based LAMP method. Nasopharyngeal swabs were taken in duplicate from patients visiting the kiosk and were analyzed for the presence of the SARS-CoV-2 virus by both real-time RT-PCR and LAMP techniques ID NOW(bbott). Out of 14 positive and 31 negative samples tested by real-time RT-PCR, 13 samples were identified as positive and 31 were observed as negative with the LAMP-based test. Hence, the sensitivity and specificity of this method were found to be 92.9% and 93.5%, respectively. Therefore, LAMP-based point-of-care testing has the potential to be used in hospital emergency settings for quick diagnosis of critically ill patients, and the information generated here will further draw the attention of policymakers toward such nucleic acid-based rapid tests.

Keywords

• point-of-care testing
• nucleic acid-based detection
• LAMP
• real-time RT-PCR
• COVID-19