Evidence map›Paper›PMID 33539899›Full record

ArticleThe Journal of allergy and clinical immunology2021

α-Gal specific-IgE prevalence and levels in Ecuador and Kenya: Relation to diet, parasites, and IgG

Jeffrey M Wilson, Behnam Keshavarz, Hayley R James, Maya K C Retterer, Alexander J Schuyler, Alice Knoedler, Lisa J Workman, Lucy Ng'ang'a, Martha E Chico, Eva Rönmark and 4 more

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in The Journal of allergy and clinical immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.0field-weighted citation impact, top 15% 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

17 citing papers in PubMed, 23 citations in OpenAlex.

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  5. Pre-clinical strategies and emerging technologies driving advances in the alpha-gal syndrome.Allergology international : official journal of the Japanese Society of Allergology · 2025
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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

14 authors at 6 institutions in 5 countries.

Jeffrey M WilsonDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Behnam KeshavarzDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Hayley R JamesDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Maya K C RettererDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Alexander J SchuylerDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Alice KnoedlerDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Lisa J WorkmanDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Lucy Ng'ang'aUnited States International University, Nairobi, Kenya.
Martha E ChicoFundación Ecuatoriana Para Investigación para Salud, Quinindé, Ecuador.
Eva RönmarkDepartment of Public Health and Clinical Medicine, OLIN Unit, Umeå University, Umeå, Sweden.
Peter W HeymannDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va.
Matthew S PerzanowskiMailman School of Public Health, Columbia University, New York, NY.
Thomas A E Platts-MillsDivision of Allergy & Clinical Immunology, University of Virginia, Charlottesville, Va. Electronic address: tap2z@virginia.edu.
Philip J CooperFundación Ecuatoriana Para Investigación para Salud, Quinindé, Ecuador; Institute of Infection and Immunity, St George's University of London, London, United Kingdom; Escuela de Medicina, Universidad Internacional del Ecuador, Quito, Ecuador. Electronic address: pcooper@sgul.ac.uk.
University of Virginia · USColumbia University · USFundación Para La Investigación Y Gestión En Servicios de Salud · ECSt George's, University of London · GBUmeå University · SEUnited States International University Africa · KE

Funding

True Metal fac coreP30ES009089 · NIEHS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI MATTHEW S PERZANOWSKI · 1998 to 2026
$44.7M
IgE antibodies to the mammalian oligosaccharide galactose-alpha-1, 3-galactose (alpha-gal): immunology, epidemiology and relevance to allergic and inflammatory diseaseR37AI020565 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI THOMAS A. PLATTS-MILLS · 1992 to 2026
$8.4M
NIAID NIH HHS R37 AI020565NIEHS NIH HHS P30 ES009089Wellcome TrustWellcome Trust 088862/Z/09/Z
6 · The paper itself

Abstract

backgroundIgE to α-Gal is a cause of mammalian meat allergy and has been linked to tick bites in North America, Australia, and Eurasia. Reports from the developing world indicate that α-Gal sensitization is prevalent but has been little investigated.

objectiveWe sought evidence for the cause(s) of α-Gal sensitization and lack of reported meat allergy among children in less developed settings in Ecuador and Kenya.

methodsIgE to α-Gal and total IgE were assessed in children from Ecuador (n = 599) and Kenya (n = 254) and compared with children with (n = 42) and without known (n = 63) mammalian meat allergy from the southeastern United States. Information on diet, potential risk factors, and helminth infections was available for children from Ecuador. IgG

resultsIn Ecuador (32%) and Kenya (54%), α-Gal specific IgE was prevalent, but levels were lower than in children with meat allergy from the United States. Sensitization was associated with rural living, antibody markers of Ascaris exposure, and total IgE, but not active infections with Ascaris or Trichuris species. In Ecuador, 87.5% reported consuming beef at least once per week, including 83.9% of those who had α-Gal specific IgE. Levels of α-Gal specific IgG

conclusionsThese results suggest that in areas of the developing world with endemic parasitism, α-Gal sensitization is (1) common, (2) associated with Ascaris exposure, and (3) distinguished by a low percentage of specific/total IgE compared with individuals with meat allergy in the United States.

Indexed as

AdolescentAdultAnimalsAscarisChildChild, PreschoolDietDisaccharidesEcuadorFecesFemaleFood HypersensitivityHumansImmunoglobulin EImmunoglobulin GKenyaDisaccharidesgalactosyl-(1-3)galactoseImmunoglobulin EImmunoglobulin Galpha-GalAscarisIgEmammalian meat allergyparasitesensitization

Identifiers

PMID33539899
PMCPMC8496981
OpenAlexW3128842812

What OpenQuestion holds

Textmetadata
LicenceTDM
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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.