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Osmanodja B, Budde K, Zickler D, Naik MG, Hofmann J, Gertler M, Hülso C, Rössig H, Horn P, Seybold J, Lunow S, Bothmann M, Barrera-Pesek A, Mayrdorfer M. Accuracy of a Novel SARS-CoV-2 Antigen-Detecting Rapid Diagnostic Test from Standardized Self-Collected Anterior Nasal Swabs. J Clin Med 2021; 10:jcm10102099. [PMID: 34068236 PMCID: PMC8153114 DOI: 10.3390/jcm10102099] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 01/01/2023] Open
Abstract
Background Antigen-detecting rapid diagnostic tests (Ag-RDT) for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) offer new opportunities for the quick and laboratory-independent identification of infected individuals for control of the SARS-CoV-2 pandemic. Despite the potential benefits, nasopharyngeal sample collection is frequently perceived as uncomfortable by patients and requires trained healthcare personnel with protective equipment. Therefore, anterior nasal self-sampling is increasingly recognized as a valuable alternative. Methods We performed a prospective, single-center, point of care validation of an Ag-RDT using a polypropylene absorbent collector for standardized self-collected anterior nasal swabs. Real-time polymerase chain reaction (RT-PCR) from combined oropharyngeal/nasopharyngeal swabs served as a comparator. Primary endpoint was sensitivity of the standardized Ag-RDT in symptomatic patients with medium or high viral concentration (≥1 million RNA copies on RT-PCR for SARS-CoV-2). Results Between 12 February and 22 March 2021, 388 participants were enrolled. After exclusion of 9 patients for which no PCR result could be obtained, the novel Ag-RDT was evaluated based on 379 participants, of whom 273 were symptomatic and 106 asymptomatic. In 61 samples from symptomatic patients with medium or high viral load (≥1 million RNA copies), the sensitivity of the standardized Ag-RDT was 96.7% (59/61; 95% confidence interval (CI): 88.7–99.6%) for the primary endpoint. In total, 62 positive Ag-RDT results were detected out of 70 RT-PCR positive individuals, yielding an overall sensitivity of 88.6% (95% CI: 78.7–94.9%). Specificity was 99.7% (95% CI: 98.2–100%) in 309 RT-PCR negative individuals. Conclusions Here, we present a validation of a novel Ag-RDT with a standardized sampling process for anterior nasal self-collection, which meets World Health Organisation (WHO) criteria of ≥80% sensitivity and ≥97% specificity. Although less sensitive than RT-PCR, this assay could be beneficial due to its rapid results, ease of use, and suitability for standardized self-testing.
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Affiliation(s)
- Bilgin Osmanodja
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (K.B.); (D.Z.); (M.G.N.); (M.M.)
- Correspondence: ; Tel.: + 49-30-450-614-368
| | - Klemens Budde
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (K.B.); (D.Z.); (M.G.N.); (M.M.)
| | - Daniel Zickler
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (K.B.); (D.Z.); (M.G.N.); (M.M.)
| | - Marcel G. Naik
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (K.B.); (D.Z.); (M.G.N.); (M.M.)
- Berlin Institute of Health, 10117 Berlin, Germany
| | - Jörg Hofmann
- Institute of Virology, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany;
- Labor Berlin–Charité Vivantes GmbH, 13353 Berlin, Germany
| | - Maximilian Gertler
- Institute of Tropical Medicine and International Health, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (M.G.); (C.H.); (S.L.); (M.B.); (A.B.-P.)
| | - Claudia Hülso
- Institute of Tropical Medicine and International Health, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (M.G.); (C.H.); (S.L.); (M.B.); (A.B.-P.)
| | - Heike Rössig
- Medical Directorate, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (H.R.); (P.H.); (J.S.)
| | - Philipp Horn
- Medical Directorate, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (H.R.); (P.H.); (J.S.)
| | - Joachim Seybold
- Medical Directorate, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (H.R.); (P.H.); (J.S.)
| | - Stephanie Lunow
- Institute of Tropical Medicine and International Health, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (M.G.); (C.H.); (S.L.); (M.B.); (A.B.-P.)
| | - Melanie Bothmann
- Institute of Tropical Medicine and International Health, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (M.G.); (C.H.); (S.L.); (M.B.); (A.B.-P.)
| | - Astrid Barrera-Pesek
- Institute of Tropical Medicine and International Health, Charité–Universitätsmedizin Berlin, 13353 Berlin, Germany; (M.G.); (C.H.); (S.L.); (M.B.); (A.B.-P.)
| | - Manuel Mayrdorfer
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, 10117 Berlin, Germany; (K.B.); (D.Z.); (M.G.N.); (M.M.)
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