Evidence map›Paper›PMID 34151460›Full record

ArticleTransfusion2021

Lewis and ABO histo-blood types and the secretor status of patients hospitalized with COVID-19 implicate a role for ABO antibodies in susceptibility to infection with SARS-CoV-2.

Eva Maria Matzhold, Andrea Berghold, Maria Karin Berta Bemelmans, Chiara Banfi, Evelyn Stelzl, Harald Hans Kessler, Ivo Steinmetz, Robert Krause, Herbert Wurzer, Peter Schlenke and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Transfusion, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
4.2field-weighted citation impact, top 5% of its field
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

25 citing papers in PubMed, 33 citations in OpenAlex.

  1. Review
  2. Article
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  4. Recombinant Production and Characterization of a Novel α-L-Fucosidase fromInternational journal of molecular sciences · 2025
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  8. Review
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  10. Immunoglobulin Class Profiles of ABO Antibodies in Saliva and Serum of Healthy Individuals.Transfusion medicine and hemotherapy : offizielles Organ der Deutschen Gesellschaft fur Transfusionsmedizin und Immunhamatologie · 2023
    Article
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  14. Observational
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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

11 authors at 2 institutions in 1 country.

Eva Maria MatzholdDepartment of Blood Group Serology and Transfusion Medicine, Medical University of Graz, Graz, Austria.ORCID 0000-0002-4914-9880
Andrea BergholdInstitute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria.
Maria Karin Berta BemelmansDepartment of Blood Group Serology and Transfusion Medicine, Medical University of Graz, Graz, Austria.
Chiara BanfiInstitute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria.
Evelyn StelzlDiagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Research Unit Molecular Diagnostics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria.
Harald Hans KesslerDiagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Research Unit Molecular Diagnostics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria.
Ivo SteinmetzDiagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Research Unit Molecular Diagnostics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria.
Robert KrauseSection of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
Herbert WurzerDepartment of Internal Medicine, Landeskrankenhaus Graz II, Graz, Austria.
Peter SchlenkeDepartment of Blood Group Serology and Transfusion Medicine, Medical University of Graz, Graz, Austria.
Thomas WagnerDepartment of Blood Group Serology and Transfusion Medicine, Medical University of Graz, Graz, Austria.
Medical University of Graz · ATLandeskrankenhaus Feldkirch · AT

Funding

City of Graz
6 · The paper itself

Abstract

backgroundSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) targets the respiratory and gastric epithelium, causing coronavirus disease 2019 (COVID-19). Tissue antigen expression variations influence host susceptibility to many infections. This study aimed to investigate the closely linked Lewis (FUT3) and ABO histo-blood types, including secretor (FUT2) status, to infections with SARS-CoV-2 and the corresponding severity of COVID-19. STUDY DESIGN AND

methodsPatients (Caucasians, n = 338) were genotyped for ABO, FUT3, and FUT2, and compared to a reference population of blood donors (n = 250,298). The association between blood types and severity of COVID-19 was addressed by dividing patients into four categories: hospitalized individuals in general wards, patients admitted to the intensive care unit with and without intubation, and deceased patients. Comorbidities were considered in subsequent analyses.

resultsPatients with blood type Lewis (a-b-) or O were significantly less likely to be hospitalized (odds ratio [OR] 0.669, confidence interval [CI] 0.446-0.971, OR 0.710, CI 0.556-0.900, respectively), while type AB was significantly more prevalent in the patient cohort (OR 1.519, CI 1.014-2.203). The proportions of secretors/nonsecretors, and Lewis a+ or Lewis b+ types were consistent between patients and controls. The analyzed blood groups were not associated with the clinical outcome as defined. DISCUSSION: Blood types Lewis (a-b-) and O were found to be protective factors, whereas the group AB is suggested to be a risk factor for COVID-19. The antigens investigated may not be prognostic for disease severity, but a role for ABO isoagglutinins in SARS-CoV-2 infections is strongly suggested.

Indexed as

ABO Blood-Group SystemDisease SusceptibilityLewis Blood Group AntigensAdultAgedAged, 80 and overComorbidityCOVID-19FemaleHost-Pathogen InteractionsHumansMaleMiddle AgedOdds RatioPublic Health SurveillanceSARS-CoV-2ABO Blood-Group SystemLewis Blood Group AntigensABOCOVID-19host-pathogen interactionLewissecretor

Identifiers

PMID34151460
PMCPMC8447157
OpenAlexW3176164237

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.