Misinterpretation of viral load in COVID-19 clinical outcomes.
COVID-19
Clinical outcomes
Ct values
SARS-CoV-2
Viral load
Journal
Virus research
ISSN: 1872-7492
Titre abrégé: Virus Res
Pays: Netherlands
ID NLM: 8410979
Informations de publication
Date de publication:
15 04 2021
15 04 2021
Historique:
received:
08
10
2020
revised:
08
02
2021
accepted:
09
02
2021
pubmed:
17
2
2021
medline:
31
3
2021
entrez:
16
2
2021
Statut:
ppublish
Résumé
Knowledge of viral load is essential to formulate strategies for antiviral treatment, vaccination, and epidemiological control of COVID-19. Moreover, identification of patients with high viral loads can also be useful to understand risk factors such as age, comorbidities, severity of symptoms and hypoxia, to decide on the need for hospitalization. Several ongoing studies are analyzing viral load in different types of samples and evaluating its relationship with clinical outcomes and viral transmission pathways. However, in a great number of emerging studies, cycle threshold (Ct) values alone are often used as viral load indicators, which may be a mistake. In this study, we compared tracheal aspirate with nasopharyngeal swab samples obtained from critically ill COVID-19 patients and here we report how the raw Ct can lead to misinterpretation of results. Furthermore, based on analysis of nasopharyngeal swab samples we propose a method to reduce evaluation errors that could occur from using raw Ct data. Based on these findings, we show the impact that normalization of Ct values has on interpretation of SARS-CoV-2 viral load from different biological samples.
Identifiants
pubmed: 33592214
pii: S0168-1702(21)00047-2
doi: 10.1016/j.virusres.2021.198340
pmc: PMC7881726
pii:
doi:
Substances chimiques
RNA, Viral
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
198340Informations de copyright
Copyright © 2021 Elsevier B.V. All rights reserved.
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