Evidence map›Paper›PMID 21628654›Full record

ArticleThe Journal of infectious diseases2011

Antibodies to Plasmodium falciparum antigens predict a higher risk of malaria but protection from symptoms once parasitemic.

Bryan Greenhouse, Benjamin Ho, Alan Hubbard, Denise Njama-Meya, David L Narum, David E Lanar, Sheetij Dutta, Philip J Rosenthal, Grant Dorsey, Chandy C John

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
9.1field-weighted citation impact, top 2% 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

73 citing papers in PubMed, 113 citations in OpenAlex.

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  10. Antibody levels to variant and conservedFrontiers in immunology · 2025
    Article
  11. Parasite epidemiology and control · 2024
    Article
  12. Review
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  19. Age-Related Changes in Malaria Clinical Phenotypes During Infancy Are Modified by Sickle Cell Trait.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021
    Article
  20. Article

13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 6 institutions in 2 countries.

Bryan GreenhouseDepartment of Medicine, University of California, San Francisco, CA, USA. bgreenhouse@medsfgh.ucsf.edu
Benjamin Ho
Alan Hubbard
Denise Njama-Meya
David L Narum
David E Lanar
Sheetij Dutta
Philip J Rosenthal
Grant Dorsey
Chandy C John
University of California, San Francisco · USUniversity of Minnesota · USWalter Reed Army Institute of Research · USMakerere University · UGNational Institute of Allergy and Infectious Diseases · USUniversity of Minnesota System · US

Funding

Clinical &Molecular Studies of Drug Resistant MalariaU01AI052142 · NIAID · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI ROSENTHAL, PHILIP JON · 2003 to 2008
$4.4M
Malaria transmission and immunity in highland KenyaU01AI056270 · NIAID · UNIVERSITY OF MINNESOTA TWIN CITIES · PI JOHN, CHANDY C. · 2005 to 2009
$2.9M
Intramural NIH HHSNIAID NIH HHS AI052142NIAID NIH HHS AI056270
6 · The paper itself

Abstract

backgroundAssociations between antibody responses to Plasmodium falciparum antigens and protection against symptomatic malaria have been difficult to ascertain, in part because antibodies are potential markers of both exposure to P. falciparum and protection against disease.

methodsWe measured IgG responses to P. falciparum circumsporozoite protein, liver-stage antigen 1, apical-membrane antigen 1 (AMA-1), and merozoite surface proteins (MSP) 1 and 3, in children in Kampala, Uganda, and measured incidence of malaria before and after antibody measurement.

resultsStronger responses to all 5 antigens were associated with an increased risk of clinical malaria (P < .01) because of confounding with prior exposure to P. falciparum. However, with use of another assessment, risk of clinical malaria once parasitemic, stronger responses to AMA-1, MSP-1, and MSP-3 were associated with protection (odds ratios, 0.34, 0.36, and 0.31, respectively, per 10-fold increase; P < .01). Analyses assessing antibodies in combination suggested that any protective effect of antibodies was overestimated by associations between individual responses and protection.

conclusionsUsing the risk of symptomatic malaria once parasitemic as an outcome may improve detection of associations between immune responses and protection from disease. Immunoepidemiology studies designed to detect mechanisms of immune protection should integrate prior exposure into the analysis and evaluate multiple immune responses.

Indexed as

Antibodies, ProtozoanAntigens, ProtozoanChildChild, PreschoolCohort StudiesHumansImmunoglobulin GIncidenceInfantLongitudinal StudiesMalaria, FalciparumParasitemiaPlasmodium falciparumRisk FactorsUgandaAntibodies, ProtozoanAntigens, ProtozoanImmunoglobulin G

Identifiers

PMID21628654
PMCPMC3105040
OpenAlexW2126803437

What OpenQuestion holds

Textmetadata
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.