Please use this identifier to cite or link to this item:
Title: Rapid direct nucleic acid amplification test without RNA extraction for SARS-CoV-2 using a portable PCR thermocycler
Authors: Wee, Soon Keong
Sivalingam, Suppiah Paramalingam
Yap, Eric Peng Huat
Keywords: Science::Medicine
Issue Date: 2020
Source: Wee, S. K., Sivalingam, S. P., & Yap, E. P. H. (2020). Rapid direct nucleic acid amplification test without RNA extraction for SARS-CoV-2 using a portable PCR thermocycler. Genes, 11(6), 664-. doi:10.3390/genes11060664
Project: CRP13-2014-01 
Journal: Genes 
Abstract: There is an ongoing worldwide coronavirus disease 2019 (Covid-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). At present, confirmatory diagnosis is by reverse transcription polymerase chain reaction (RT-PCR), typically taking several hours and requiring a molecular laboratory to perform. There is an urgent need for rapid, simplified, and cost-effective detection methods. We have developed and analytically validated a protocol for direct rapid extraction-free PCR (DIRECT-PCR) detection of SARS-CoV-2 without the need for nucleic acid purification. As few as six RNA copies per reaction of viral nucleocapsid (N) gene from respiratory samples such as sputum and nasal exudate can be detected directly using our one-step inhibitor-resistant assay. The performance of this assay was validated on a commercially available portable PCR thermocycler. Viral lysis, reverse transcription, amplification, and detection are achieved in a single-tube homogeneous reaction within 36 min. This minimizes hands-on time, reduces turnaround-time for sample-to-result, and obviates the need for RNA purification reagents. It could enable wider use of Covid-19 testing for diagnosis, screening, and research in countries and regions where laboratory capabilities are limiting.
ISSN: 2073-4425
DOI: 10.3390/genes11060664
Rights: © 2020 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:LKCMedicine Journal Articles

Files in This Item:
File Description SizeFormat 
genes-11-00664-v2.pdf1.42 MBAdobe PDFThumbnail

Citations 10

Updated on Mar 24, 2023

Web of ScienceTM
Citations 5

Updated on Mar 25, 2023

Page view(s)

Updated on Mar 29, 2023

Download(s) 50

Updated on Mar 29, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.