A SARS-CoV-2 antigen rapid diagnostic test for resource limited settings

Sci Rep. 2021 Nov 26;11(1):23009. doi: 10.1038/s41598-021-02128-y.

Abstract

Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is the causative agent of COVID-19 disease. RT-qPCR has been the primary method of diagnosis; however, the required infrastructure is lacking in many developing countries and the virus has remained a global challenge. More inexpensive and immediate test methods are required to facilitate local, regional, and national management strategies to re-open world economies. Here we have developed a SARS-CoV-2 antigen test in an inexpensive lateral flow format to generate a chromatographic result identifying the presence of the SARS-CoV-2 antigen, and thus an active infection, within a patient anterior nares swab sample. Our 15-min test requires no equipment or laboratory infrastructure to administer with a limit of detection of 2.0 × 102 TCID50/mL and 87.5% sensitivity, 100% specificity when tested against 40 known positive and 40 known negative patient samples established by a validated RT-qPCR test.

MeSH terms

  • Antigens, Viral
  • Diagnostic Tests, Routine
  • Humans
  • SARS-CoV-2*
  • Sensitivity and Specificity

Substances

  • Antigens, Viral