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Article

The Light and Shadow of Rapid Serological Tests for SARS-CoV-2 Infection: Results from a Study in a Large Emergency Department

1
Department of Biomedical Sciences and Human Oncology-Hygiene Section, University of Bari, Piazza G. Cesare 11, 70124 Bari, Italy
2
Hygiene Unit, Policlinico Hospital, Piazza G. Cesare 11, 70124 Bari, Italy
3
Emergency Department, Policlinico Hospital, Piazza G. Cesare 11, 70124 Bari, Italy
*
Author to whom correspondence should be addressed.
Daniela Loconsole and Francesca Centrone contributed equally to this work as first authors.
Int. J. Environ. Res. Public Health 2020, 17(18), 6493; https://doi.org/10.3390/ijerph17186493
Received: 22 July 2020 / Revised: 27 August 2020 / Accepted: 4 September 2020 / Published: 7 September 2020
(This article belongs to the Special Issue The COVID-19 Pandemic in Europe: Response to Challenges)
A critical point in the management of the SARS-CoV-2 pandemic is the need to promptly identify the greatest number of infected people and to implement strict public health measures. In this study, the performance of a rapid serological test in a clinical setting was evaluated. Samples from 819 consecutive patients (with or without respiratory symptoms) admitted to a large Emergency Department were tested between 23 March and 21 April 2020. Patient samples were tested in a real-time PCR assay and a serological assay. In total, 148/819 patients (18.1%) tested positive for SARS-CoV-2 by real-time PCR. The serological test revealed that 70/819 patients (8.5%) had anti-SARS-CoV-2 IgM and/or IgG. The prevalence of anti-SARS-CoV-2 antibodies was significantly higher in patients with respiratory symptoms lasting for >7 days than in those with respiratory symptoms lasting for 0–7 days (p < 0.001). The serological assay had an overall sensitivity of 35.1% and an overall specificity of 97.3%. A high negative predictive value (96.7%) was reported for patients without respiratory symptoms. The results confirm that rapid serological assays alone are not sufficient for diagnosis of SARS-CoV-2 infection but can be incorporated into large-scale screening programs during periods in which the virus circulation is low. View Full-Text
Keywords: SARS-CoV-2 infection; COVID-19; serological test; laboratory test; real-time PCR SARS-CoV-2 infection; COVID-19; serological test; laboratory test; real-time PCR
MDPI and ACS Style

Loconsole, D.; Centrone, F.; Morcavallo, C.; Campanella, S.; Sallustio, A.; Quarto, M.; Procacci, V.; Chironna, M. The Light and Shadow of Rapid Serological Tests for SARS-CoV-2 Infection: Results from a Study in a Large Emergency Department. Int. J. Environ. Res. Public Health 2020, 17, 6493. https://doi.org/10.3390/ijerph17186493

AMA Style

Loconsole D, Centrone F, Morcavallo C, Campanella S, Sallustio A, Quarto M, Procacci V, Chironna M. The Light and Shadow of Rapid Serological Tests for SARS-CoV-2 Infection: Results from a Study in a Large Emergency Department. International Journal of Environmental Research and Public Health. 2020; 17(18):6493. https://doi.org/10.3390/ijerph17186493

Chicago/Turabian Style

Loconsole, Daniela, Francesca Centrone, Caterina Morcavallo, Silvia Campanella, Anna Sallustio, Michele Quarto, Vito Procacci, and Maria Chironna. 2020. "The Light and Shadow of Rapid Serological Tests for SARS-CoV-2 Infection: Results from a Study in a Large Emergency Department" International Journal of Environmental Research and Public Health 17, no. 18: 6493. https://doi.org/10.3390/ijerph17186493

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