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Seitz T, Lickefett B, Traugott M, Pawelka E, Karolyi M, Baumgartner S, Jansen-Skoupy S, Atamaniuk J, Fritsche-Polanz R, Asenbaum J, Wenisch C, Födinger M, Zoufaly A. Evaluation of Five Commercial SARS-CoV-2 Antigen Tests in a Clinical Setting. J Gen Intern Med 2022; 37:1494-1500. [PMID: 35301660 PMCID: PMC8929460 DOI: 10.1007/s11606-022-07448-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 02/02/2022] [Indexed: 01/08/2023]
Abstract
BACKGROUND Point-of-care antigen tests (AgTs) for the detection of severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) enable the rapid testing of infected individuals and are easy-to-use. However, there are few studies evaluating their clinical use. OBJECTIVE The present study aimed to evaluate and compare the clinical performance characteristics of various commercial SARS-CoV-2 AgTs. DESIGN The sensitivity of five AgTs, comprising four rapid antigen tests (RAT; AMP Rapid Test SARS-CoV-2 Ag, NADAL COVID-19 Antigen Rapid Test, CLINITEST Rapid COVID-19 Antigen Test, and Roche SARS-CoV-2 Rapid Antigen Test) and one sandwich chemiluminescence immunoassay (CLIA; LIAISON SARS-CoV-2 Assay), were evaluated in 300 nasopharyngeal (NP) swabs. Reverse transcriptase (RT) polymerase chain reaction (PCR) was used as a reference method. PARTICIPANTS NP swabs were collected from patients admitted to hospital due to COVID-19. KEY RESULTS Sensitivities of the AgTs ranged from 64.9 to 91.7% for samples with RT-PCR cycle threshold (Ct) values lower than 30 and were 100% for cycle threshold (Ct) values lower than 20. The highest sensitivity was observed for CLINITEST Rapid COVID-19 Antigen Test, and Roche SARS-CoV-2 rapid antigen test. Multivariate analysis using time from symptom onset and the Ct value for AgT sensitivity showed an inverse correlation. Further, the female sex was an independent factor of lower RAT sensitivity. CONCLUSIONS Antigen tests from NP swab samples show high sensitivity in patients with a Ct value < 20. The best clinical sensitivity can be obtained using AgTs within the first 6 days after symptom onset.
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Affiliation(s)
- Tamara Seitz
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria.
| | - Benno Lickefett
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Marianna Traugott
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Erich Pawelka
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Mario Karolyi
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Sebastian Baumgartner
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Sonja Jansen-Skoupy
- Institute of Laboratory Diagnostics, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
| | - Johanna Atamaniuk
- Institute of Laboratory Diagnostics, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
| | - Robert Fritsche-Polanz
- Institute of Laboratory Diagnostics, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
| | - Johannes Asenbaum
- Institute of Laboratory Diagnostics, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
| | - Christoph Wenisch
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
| | - Manuela Födinger
- Institute of Laboratory Diagnostics, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
| | - Alexander Zoufaly
- Department of Infectious Diseases and Tropical Medicine, Clinic Favoriten, Vienna, Austria
- Medical Faculty, Sigmund Freud Private University, Vienna, Austria
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