Article A Single-Round Infection Fluorescent SARS-CoV-2 Neutralization Test for COVID-19 Serological Testing at a Biosafety Level-2 Laboratory

Jing Zou, Hongjie Xia, Pei Yong Shi, Xuping Xie, Ping Ren

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A robust serological test to measure neutralizing antibodies against SARS-CoV-2 in biosafety level-2 (BSL-2) laboratories is useful for monitoring antibody response after vaccination or natural infection. The gold standard assay is the conventional plaque reduction neutralization test (PRNT) which requires extensive labor, live viruses, and BSL-3 facilities. Recently, we developed a novel single-round infection fluorescent SARS-CoV-2 virus (SFV) that can be safely used at BSL-2 laboratories for high-throughput neutralization and antiviral testing. In this study, we evaluated the performance of the neutralization test using this SFV with 80 PRNT-positive and 92 PRNT-negative clinical serum or plasma specimens. The SFV neutralization test (SFVNT) has 100% sensitivity and specificity compared to the PRNT. Furthermore, the neutralizing titers generated by the SFVNT and PRNT are highly correlated, with R2 = 0.903 (p < 0.0001). Due to high sensitivity, specificity, accuracy, and reproducibility, the SFVNT can be deployed for the large-scale testing of COVID-19 patients or vaccinated people in general lab settings.

Original languageEnglish (US)
Article number1211
JournalViruses
Volume14
Issue number6
DOIs
StatePublished - Jun 2022

Keywords

  • accuracy
  • linearity
  • neutralization assay
  • sensitivity
  • single-round infection fluorescent SARS-CoV-2 virus
  • specificity

ASJC Scopus subject areas

  • Infectious Diseases
  • Virology

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