Evidence map›Paper›PMID 33183292›Full record

ArticleBMC medicine2020

Sero-epidemiological evaluation of malaria transmission in The Gambia before and after mass drug administration.

Lindsey Wu, Julia Mwesigwa, Muna Affara, Mamadou Bah, Simon Correa, Tom Hall, Susheel K Singh, James G Beeson, Kevin K A Tetteh, Immo Kleinschmidt and 2 more

Open access · goldAbstract read
In one paragraph

Article in BMC medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
4.1field-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

20 citing papers in PubMed, 33 citations in OpenAlex.

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  5. Mapping residual malaria transmission in Vietnam.The Lancet regional health. Western Pacific · 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

12 authors at 7 institutions in 6 countries.

Lindsey WuFaculty of Infectious Tropical Diseases, Department of Infection Biology, London School of Hygiene and Tropical Medicine (LSHTM), London, WC1E 7HT, UK. lindsey.wu@lshtm.ac.uk.
Julia MwesigwaMedical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine, Fajara, The Gambia.
Muna AffaraBernhard Nocht Institute for Tropical Medicine (BNITM), Arusha, Tanzania.
Mamadou BahMedical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine, Fajara, The Gambia.
Simon CorreaMedical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine, Fajara, The Gambia.
Tom HallSt. George's University of London (SGUL), London, SW17 0RE, UK.
Susheel K SinghDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
James G BeesonBurnet Institute, Melbourne, Victoria, 3004, Australia.
Kevin K A TettehFaculty of Infectious Tropical Diseases, Department of Infection Biology, London School of Hygiene and Tropical Medicine (LSHTM), London, WC1E 7HT, UK.
Immo KleinschmidtFaculty of Epidemiology and Population Health, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine (LSHTM), London, WC1E 7HT, UK.
Umberto D'AlessandroMedical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine, Fajara, The Gambia.
Chris DrakeleyFaculty of Infectious Tropical Diseases, Department of Infection Biology, London School of Hygiene and Tropical Medicine (LSHTM), London, WC1E 7HT, UK.
MRC Unit the Gambia · GMLondon School of Hygiene & Tropical Medicine · GBInternational Institute of Tropical Agriculture · TZMonash University · AUSt George's, University of London · GBUniversity of Copenhagen · DKUniversity of the Witwatersrand · ZA

Funding

Medical Research Council MC_EX_MR/J002364/1Medical Research Council MR/R010161/1
6 · The paper itself

Abstract

backgroundAs The Gambia aims to achieve malaria elimination by 2030, serological assays are a useful surveillance tool to monitor trends in malaria incidence and evaluate community-based interventions.

methodsWithin a mass drug administration (MDA) study in The Gambia, where reduced malaria infection and clinical disease were observed after the intervention, a serological sub-study was conducted in four study villages. Spatio-temporal variation in transmission was measured with a panel of recombinant Pf antigens on a multiplexed bead-based assay. Village-level antibody levels were quantified as under-15 sero-prevalence, sero-conversion rates, and age-adjusted antibody acquisition rates. Antibody levels prior to MDA were assessed for association with persistent malaria infection after community chemoprophylaxis.

resultsSeasonal changes in antibodies to Etramp5.Ag1 were observed in children under 15 years in two transmission settings-the West Coast and Upper River Regions (4.32% and 31.30% Pf prevalence, respectively). At the end of the malaria season, short-lived antibody responses to Etramp5.Ag1, GEXP18, HSP40.Ag1, EBA175 RIII-V, and Rh2.2030 were lower amongst 1-15 year olds in the West Coast compared to the Upper River, reflecting known differences in transmission. Prior to MDA, individuals in the top 50th percentile of antibody levels had two-fold higher odds of clinical malaria during the transmission season, consistent with previous findings from the Malaria Transmission Dynamics Study, where individuals infected before the implementation of MDA had two-fold higher odds of re-infection post-MDA.

conclusionsSerological markers can serve dual functions as indicators of malaria exposure and incidence. By monitoring age-specific sero-prevalence, the magnitude of age-stratified antibody levels, or identifying groups of individuals with above-average antibody responses, these antigens have the potential to complement conventional malaria surveillance tools. Further studies, particularly cluster randomised trials, can help establish standardised serological protocols to reliably measure transmission across endemic settings.

Indexed as

AdolescentChildChild, PreschoolFemaleGambiaHumansIncidenceMalariaMaleMass Drug AdministrationPlasmodium falciparumPrevalenceProspective StudiesMalariaMass drug administrationSerologySurveillance

Identifiers

PMID33183292
PMCPMC7664049
OpenAlexW3099527538

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.