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Serological responses to SARS-CoV-2 following non-hospitalised infection: clinical and ethnodemographic features associated with the magnitude of the antibody response.
Shields, Adrian M; Faustini, Sian E; Perez-Toledo, Marisol; Jossi, Sian; Allen, Joel D; Al-Taei, Saly; Backhouse, Claire; Dunbar, Lynsey A; Ebanks, Daniel; Emmanuel, Beena; Faniyi, Aduragbemi A; Garvey, Mark; Grinbergs, Annabel; McGinnell, Golaleh; O'Neill, Joanne; Watanabe, Yasunori; Crispin, Max; Wraith, David C; Cunningham, Adam F; Drayson, Mark T; Richter, Alex G.
  • Shields AM; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Faustini SE; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Perez-Toledo M; Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK.
  • Jossi S; Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK.
  • Allen JD; School of Biological Sciences, University of Southampton, Southampton, UK.
  • Al-Taei S; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Backhouse C; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Dunbar LA; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Ebanks D; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Emmanuel B; Department of Clinical Immunology Service, University of Birmingham College of Medical and Dental Sciences, Birmingham, UK.
  • Faniyi AA; Birmingham Acute Care Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK.
  • Garvey M; University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
  • Grinbergs A; Institute of Microbiology and Infection, University of Birmingham, Birmingham, UK.
  • McGinnell G; University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
  • O'Neill J; University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
  • Watanabe Y; University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
  • Crispin M; School of Biological Sciences, University of Southampton, Southampton, UK.
  • Wraith DC; Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, Oxford, UK.
  • Cunningham AF; School of Biological Sciences, University of Southampton, Southampton, UK.
  • Drayson MT; Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK.
  • Richter AG; MRC Centre for Immune Regulation, University of Birmingham, Birmingham, UK.
BMJ Open Respir Res ; 8(1)2021 09.
Article in English | MEDLINE | ID: covidwho-1438095
ABSTRACT

OBJECTIVE:

To determine clinical and ethnodemographic correlates of serological responses against the SARS-CoV-2 spike glycoprotein following mild-to-moderate COVID-19.

DESIGN:

A retrospective cohort study of healthcare workers who had self-isolated due to COVID-19.

SETTING:

University Hospitals Birmingham NHS Foundation Trust, UK (UHBFT).

PARTICIPANTS:

956 healthcare workers were recruited by open invitation via UHBFT trust email and social media between 27 April 2020 and the 8 June 2020. INTERVENTION Participants volunteered a venous blood sample that was tested for the presence of anti-SARS-CoV-2 spike glycoprotein antibodies. Results were interpreted in the context of the symptoms of their original illness and ethnodemographic variables.

RESULTS:

Using an assay that simultaneously measures the combined IgG, IgA and IgM response against the spike glycoprotein (IgGAM), the overall seroprevalence within this cohort was 46.2% (n=442/956). The seroprevalence of immunoglobulin isotypes was 36.3%, 18.7% and 8.1% for IgG, IgA and IgM, respectively. IgGAM identified serological responses in 40.6% (n=52/128) of symptomatic individuals who reported a negative SARS-CoV-2 PCR test. Increasing age, non-white ethnicity and obesity were independently associated with greater IgG antibody response against the spike glycoprotein. Self-reported fever and fatigue were associated with greater IgG and IgA responses against the spike glycoprotein. The combination of fever and/or cough and/or anosmia had a positive predictive value of 92.3% for seropositivity in self-isolating individuals a time when Wuhan strain SARS-CoV-2 was predominant. CONCLUSIONS AND RELEVANCE Assays employing combined antibody detection demonstrate enhanced seroepidemiological sensitivity and can detect prior viral exposure even when PCR swabs have been negative. We demonstrate an association between known ethnodemographic risk factors associated with mortality from COVID-19 and the magnitude of serological responses in mild-to-moderate disease.
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Full text: Available Collection: International databases Database: MEDLINE Document Type: Article Main subject: COVID-19 / Antibodies, Viral / Antibody Formation Subject: COVID-19 / Antibodies, Viral / Antibody Formation Type of study: Observational study / Prognostic study / Risk factors Language: English Clinical aspect: Etiology / Prediction / Prognosis Year: 2021

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Full text: Available Collection: International databases Database: MEDLINE Document Type: Article Main subject: COVID-19 / Antibodies, Viral / Antibody Formation Subject: COVID-19 / Antibodies, Viral / Antibody Formation Type of study: Observational study / Prognostic study / Risk factors Language: English Clinical aspect: Etiology / Prediction / Prognosis Year: 2021
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