Evidence map›Paper›PMID 27809852›Full record

ArticleMalaria journal2016

Serological markers to measure recent changes in malaria at population level in Cambodia.

Karen Kerkhof, Vincent Sluydts, Laura Willen, Saorin Kim, Lydie Canier, Somony Heng, Takafumi Tsuboi, Tho Sochantha, Siv Sovannaroth, Didier Ménard and 2 more

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. eLife · 2021
    Pooled it
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  9. Naturally acquired antibodies toFrontiers in immunology · 2026
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  10. Serology reveals comparable patterns in the transmission intensities ofFrontiers in cellular and infection microbiology · 2025
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  11. Article
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  13. Using Serological Markers for the Surveillance ofPathogens (Basel, Switzerland) · 2023
    Article
  14. Article
  15. Serology reveals micro-differences inFrontiers in parasitology · 2023
    Article
  16. Article
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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

12 authors at 5 institutions in 3 countries.

Karen KerkhofDepartment of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium. kkerkhof@itg.be.ORCID http://orcid.org/0000-0002-2208-9902
Vincent SluydtsDepartment of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
Laura WillenDepartment of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
Saorin KimMolecular Epidemiology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia.
Lydie CanierMolecular Epidemiology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia.
Somony HengNational Centre for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia.
Takafumi TsuboiDivision of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan.
Tho SochanthaNational Centre for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia.
Siv SovannarothNational Centre for Parasitology, Entomology and Malaria Control, Phnom Penh, Cambodia.
Didier MénardMolecular Epidemiology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia.
Marc CoosemansDepartment of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
Lies DurnezDepartment of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium. ldurnez@itg.be.
University of Antwerp · BECambodia National Malaria Center · KHInstitut Pasteur du Cambodge · KHEhime University · JPInstituut voor Tropische Geneeskunde · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSerological markers for exposure to different Plasmodium species have recently been used in multiplex immunoassays based on the Luminex technology. However, interpretation of the assay results requires consideration of the half-life of specific antibodies against these markers. Therefore, the aim of the present study was to document the half-life of malaria specific serological makers, as well as assessing the sensitivity of these markers to pick up recent changes in malaria exposure.

methodsA recently developed multiplex immunoassay was used to measure the intensity of antibody (Ab) responses against 19 different Plasmodium specific antigens, covering different human malaria parasites and two vector saliva antigens. Therefore, 8439 blood samples from five cross-sectional surveys in Ratanakiri, Cambodia, were analysed. These involve a random selection from two selected surveys, and an additional set of blood samples of individuals that were randomly re-sampled three, four or five times. A generalized estimating equation model and linear regression models were fitted on log transformed antibody intensity data.

resultsResults showed that most (17/21) Ab-responses are higher in PCR positive than PCR negative individuals. Furthermore, these antibody-responses follow the same upward trend within each age group. Estimation of the half-lives showed differences between serological markers that reflect short- (seasonal) and long-term (year round) transmission trends. Ab levels declined significantly together with a decrease of PCR prevalence in a group of malaria endemic villages.

conclusionFor Plasmodium falciparum, antibodies against LSA3.RE, GLURP and Pf.GLURP.R2 are most likely to be a reflexion of recent (range from 6 to 8 months) exposure in the Mekong Subregion. PvEBP is the only Plasmodium vivax Ag responding reasonably well, in spite of an estimated Ab half-life of more than 1 year. The use of Ab intensity data rather dichotomizing the continuous Ab-titre data (positive vs negative) will lead to an improved approach for serological surveillance.

Indexed as

Antibody FormationAdolescentAdultAntibodies, ProtozoanCambodiaChildChild, PreschoolCross-Sectional StudiesFemaleHalf-LifeHumansInfantMalariaMaleMiddle AgedMosquito VectorsAntibodies, ProtozoanHalf lifeMalariaMalaria transmissionSerological markers

Identifiers

PMID27809852
PMCPMC5096337
OpenAlexW2546501775

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.