Evidence map›Paper›PMID 34198719›Full record

ArticleViruses2021

SARS-CoV-2 Antigenemia as a Confounding Factor in Immunodiagnostic Assays: A Case Study.

Konstantinos Belogiannis, Venetia A Florou, Paraskevi C Fragkou, Stefanos Ferous, Loukas Chatzis, Aikaterini Polyzou, Nefeli Lagopati, Demetrios Vassilakos, Christos Kittas, Athanasios G Tzioufas and 3 more

Abstract readCase Reports
In one paragraph

Article in Viruses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

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  13. First-Time Use of the SeraphCase reports in nephrology and dialysis
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Konstantinos BelogiannisMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.ORCID 0000-0001-6505-6476
Venetia A FlorouMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.
Paraskevi C Fragkou4th Department of Internal Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, GR-12462 Athens, Greece.ORCID 0000-0003-2022-2949
Stefanos Ferous2nd Medical Department, General Hospital of Athens G. Gennimatas, GR-11527 Athens, Greece.
Loukas ChatzisDepartment of Pathophysiology, Athens School of Medicine, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.ORCID 0000-0002-2832-0116
Aikaterini PolyzouMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.
Nefeli LagopatiMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.
Demetrios VassilakosMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.ORCID 0000-0003-2695-0795
Christos KittasMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.
Athanasios G TzioufasDepartment of Pathophysiology, Athens School of Medicine, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.
Sotirios Tsiodras4th Department of Internal Medicine, Attikon University Hospital, National and Kapodistrian University of Athens, GR-12462 Athens, Greece.ORCID 0000-0002-0463-4321
George SourvinosLaboratory of Clinical Virology, Medical School, University of Crete, Crete, GR-71003 Heraklion, Greece.ORCID 0000-0002-9297-4288
Vassilis G GorgoulisMolecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, GR-11527 Athens, Greece.ORCID 0000-0001-9001-4112

Funding

Horizon 2020 Marie Sklodowska-Curie training program 722729
6 · The paper itself

Abstract

Humoral immunity has emerged as a vital immune component against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Nevertheless, a subset of recovered Coronavirus Disease-2019 (COVID-19) paucisymptomatic/asymptomatic individuals do not generate an antibody response, constituting a paradox. We assumed that immunodiagnostic assays may operate under a competitive format within the context of antigenemia, potentially explaining this phenomenon. We present a case where persistent antigenemia/viremia was documented for at least 73 days post-symptom onset using 'in-house' methodology, and as it progressively declined, seroconversion took place late, around day 55, supporting our hypothesis. Thus, prolonged SARS-CoV-2 antigenemia/viremia could mask humoral responses, rendering, in certain cases, the phenomenon of 'non-responders' a misnomer.

Indexed as

Antibodies, ViralAntigens, ViralBinding Sites, AntibodyCOVID-19COVID-19 Serological TestingHumansImmunity, HumoralImmunoglobulin GMaleSARS-CoV-2Sensitivity and SpecificitySeroconversionYoung AdultAntibodies, ViralAntigens, ViralImmunoglobulin GantibodyantigenemiaCOVID-19ELISAimmunodiagnosticsimmunoprevalencenon-respondersSARS-CoV-2seroconversionviremia

Identifiers

PMID34198719
PMCPMC8232125

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.