Manara - Qatar Research Repository
microorganisms-09-00245-v3.pdf (1.46 MB)

Diagnostic Efficiency of Three Fully Automated Serology Assays and Their Correlation with a Novel Surrogate Virus Neutralization Test in Symptomatic and Asymptomatic SARS-COV-2 Individuals

Download (1.46 MB)
journal contribution
submitted on 2024-05-08, 05:06 and posted on 2024-05-08, 05:06 authored by Salma Younes, Hadeel Al-Jighefee, Farah Shurrab, Duaa W. Al-Sadeq, Nadin Younes, Soha R. Dargham, Nader Al-Dewik, Hamda Qotba, Mohamed Syed, Ahmed Alnuaimi, Hadi M. Yassine, Patrick Tang, Laith J. Abu-Raddad, Gheyath K. Nasrallah

To support the deployment of serology assays for population screening during the COVID-19 pandemic, we compared the performance of three fully automated SARS-CoV-2 IgG assays: Mindray CL-900i® (target: spike [S] and nucleocapsid [N]), BioMérieux VIDAS®3 (target: receptor-binding domain [RBD]) and Diasorin LIAISON®XL (target: S1 and S2 subunits). A total of 111 SARS-CoV-2 RT-PCR- positive samples collected at ≥ 21 days post symptom onset, and 127 pre-pandemic control samples were included. Diagnostic performance was assessed in correlation to RT-PCR and a surrogate virus-neutralizing test (sVNT). Moreover, cross-reactivity with other viral antibodies was investigated. Compared to RT-PCR, LIAISON®XL showed the highest overall specificity (100%), followed by VIDAS®3 (98.4%) and CL-900i® (95.3%). The highest sensitivity was demonstrated by CL-900i® (90.1%), followed by VIDAS®3 (88.3%) and LIAISON®XL (85.6%). The sensitivity of all assays was higher in symptomatic patients (91.1–98.2%) compared to asymptomatic patients (78.4–80.4%). In correlation to sVNT, all assays showed excellent sensitivities (92.2–96.1%). In addition, VIDAS®3 demonstrated the best correlation (r = 0.75) with the sVNT. The present study provides insights on the performance of three fully automated assays, which could help diagnostic laboratories in the choice of a particular assay according to the intended use.

Other Information

Published in: Microorganisms
See article on publisher's website:

Additional institutions affiliated with: Primary Health Care Corporation, Qatar Medical Center, Women's Wellness and Research Center - HMC



  • English



Publication Year

  • 2021

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Qatar University
  • Biomedical Research Center - QU
  • Qatar University Health - QU
  • College of Medicine - QU HEALTH
  • Weill Cornell Medicine - Qatar
  • Hamad Medical Corporation
  • Hamad General Hospital - HMC
  • Interim Translational Research Institute - HMC
  • Hamad Bin Khalifa University
  • College of Health and Life Sciences - HBKU

Usage metrics

    Qatar University



    Ref. manager