Evidence map›Paper›PMID 30658632›Full record

ArticleMalaria journal2019

The impact of early life exposure to Plasmodium falciparum on the development of naturally acquired immunity to malaria in young Malawian children.

Priyanka Barua, James G Beeson, Kenneth Maleta, Per Ashorn, Stephen J Rogerson

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Malaria journal, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01239693 (A Research Plan for a Randomised, Single-blind, Parallel Group Controlled Trial in Rural Malawi, Testing the Health Effects of Supplementing Maternal Diet During Pregnancy and Lactation and Infant Diet From 6 to 18 Months of Age With High-energy, Micronutrient Fortified Lipid-based Nutrient Supplements), which is not on this map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
3.3field-weighted citation impact, top 9% 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.

NCT01239693 phase3active not recruitingnot on this map

A Research Plan for a Randomised, Single-blind, Parallel Group Controlled Trial in Rural Malawi, Testing the Health Effects of Supplementing Maternal Diet During Pregnancy and Lactation and Infant Diet From 6 to 18 Months of Age With High-energy, Micronutrient Fortified Lipid-based Nutrient Supplements (LNS)

TypeinterventionalSponsorTampere UniversityRan2011 to 2027Enrolled1,391ConditionsInfant Malnutrition, Malnutrition in PregnancyArmsIFA, MMN, LNS
3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 2 syntheses or guidelines pooled it, 40 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Observational
  17. The intersection of hostMicrobiology and molecular biology reviews : MMBR · 2024
    Review
  18. Article
  19. Article
  20. Naturally acquired IgG responses toFrontiers in immunology · 2024
    Article
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

5 authors at 4 institutions in 5 countries.

Priyanka BaruaThe Department of Medicine (RMH), Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, 3000, Australia.
James G BeesonThe Department of Medicine (RMH), Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, 3000, Australia.
Kenneth MaletaSchool of Public Health and Family Medicine, University of Malawi, Blantyre 3, Malawi.
Per AshornFaculty of Medicine and Life Sciences, University of Tampere and Tampere University Hospital, 33100, Tampere, Finland.
Stephen J RogersonThe Department of Medicine (RMH), Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, 3000, Australia. sroger@unimelb.edu.au.ORCID http://orcid.org/0000-0003-4287-1982
The University of Melbourne · AUBurnet Institute · AUUniversity of Malawi · MWWorld Health Organization · CH

Funding

Academy of Finland 252075Bill and Melinda Gates Foundation 49817National Health and Medical Research Council of Australia 1092789NHMRC Senior Research Fellowship APP1077636United States Agency for International Development AID-OAA-A-12-00005
6 · The paper itself

Abstract

backgroundAntibodies targeting malaria blood-stage antigens are important targets of naturally acquired immunity, and may act as valuable biomarkers of malaria exposure.

methodsSix-hundred and one young Malawian children from a randomized trial of prenatal nutrient supplementation with iron and folic acid or pre- and postnatal multiple micronutrients or lipid-based nutrient supplements were followed up weekly at home and febrile episodes were investigated for malaria from birth to 18 months of age. Antibodies were measured for 601 children against merozoite surface proteins (MSP1 19kD, MSP2), erythrocyte binding antigen 175 (EBA175), reticulocyte binding protein homologue 2 (Rh2A9), schizont extract and variant surface antigens expressed by Plasmodium falciparum-infected erythrocytes (IE) at 18 months of age. The antibody measurement data was related to concurrent malaria infection and to documented episodes of clinical malaria.

resultsAt 18 months of age, antibodies were significantly higher among parasitaemic than aparasitaemic children. Antibody levels against MSP1 19kD, MSP2, schizont extract, and IE variant surface antigens were significantly higher in children who had documented episodes of malaria than in children who did not. Antibody levels did not differ between children with single or multiple malaria episodes before 18 months, nor between children who had malaria before 6 months of age or between 6 and 18 months.

conclusionsAntibodies to merozoite and IE surface antigens increased following infection in early childhood, but neither age at first infection nor number of malaria episodes substantially affected antibody acquisition. These findings have implications for malaria surveillance during early childhood in the context of elimination. Trials registration Clinical Trials Registration: NCT01239693 (Date of registration: 11-10-2010). URL: http://www.ilins.org.

Indexed as

Adaptive ImmunityAntibodies, ProtozoanAntigens, SurfaceErythrocytesFemaleHumansInfantInfant, NewbornMalaria, FalciparumMalawiMaleMerozoitesPlasmodium falciparumPrevalenceSchizontsSeroepidemiologic StudiesAntibodies, ProtozoanAntigens, SurfaceEpisodesMerozoite antigensNutrient supplementsRandomized controlled trialSeroprevalenceVariant surface antigens

Identifiers

PMID30658632
PMCPMC6339377
OpenAlexW2913638574

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.