Evidence map›Paper›PMID 29304870›Full record

ArticleParasites & vectors2018

Dynamics of anti-MSP3 and Pfs230 antibody responses and multiplicity of infection in asymptomatic children from southern Ghana.

Linda E Amoah, Festus K Acquah, Ruth Ayanful-Torgby, Akua Oppong, Joana Abankwa, Evans K Obboh, Susheel K Singh, Michael Theisen

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
5.1field-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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

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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

8 authors at 4 institutions in 2 countries.

Linda E AmoahNoguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana. lamoah@noguchi.ug.edu.gh.
Festus K AcquahNoguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.
Ruth Ayanful-TorgbyNoguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.
Akua OppongNoguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.
Joana AbankwaNoguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana.
Evans K ObbohSchool of Medical Sciences, University of Cape Coast, Cape Coast, Ghana.
Susheel K SinghDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Michael TheisenDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
University of Ghana · GHStatens Serum Institut · DKNoguchi Memorial Institute for Medical Research · GHUniversity of Cape Coast · GH

Funding

University of Ghana URF/5/ILG-013/2011-2012
6 · The paper itself

Abstract

backgroundDuring a Plasmodium infection, exposure of human host immune cells to both the asexual and the sexual stages of the parasite elicit immune responses. These responses may be protective and prevent the development of high parasitaemia and its associated clinical symptoms, or block the transmission of malaria to an uninfected person. This study aimed at examining the dynamics of naturally acquired immune responses against the asexual and sexual forms of Plasmodium falciparum as well as assessing differences in the multiplicity of infection (MOI) in asymptomatic Ghanaian children living in two communities with varying malaria transmission intensities.

methodsSchool children aged between 6 and 12 years were recruited from Obom, a high malaria prevalence setting and Abura, a low malaria prevalence setting and enrolled in monthly multiple cross sectional surveys between February and May 2015. Filter paper blood blots (DBS) as well as thick and thin blood smears were made from finger-pricked blood at each visit. Plasmodium falciparum parasite prevalence was determined by microscopy and PCR. Serum eluted from the DBS were used to assess anti-Pfs230 (sexual stage) and anti-MSP3 (asexual stage) antibody levels using indirect ELISA and DNA extracted from the DBS used to assess MOI.

resultsMalaria parasite point prevalence and MOI throughout the study was higher in Obom than Abura. The trend of parasite prevalence estimated by microscopy was similar to that determined by PCR in Obom but not in Abura. The trend of MSP3 antibody seroprevalence followed that of PCR-estimated parasite prevalence in Obom, while in Abura the trend of Pfs230 antibody seroprevalence followed that of PCR-estimated parasite prevalence.

conclusionsMicroscopy can more accurately predict changes in parasite prevalence in high transmission settings than low transmission settings. In high transmission settings, P. falciparum parasite prevalence can predict antibody seroprevalence to MSP3, whilst in low transmission settings, seroprevalence against Pfs230 may be a useful predictor of parasite prevalence.

Indexed as

Antibody FormationAsymptomatic DiseasesAntibodies, ProtozoanAntigens, ProtozoanBloodChildCross-Sectional StudiesEnzyme-Linked Immunosorbent AssayGhanaHumansMalaria, FalciparumMicroscopyPlasmodium falciparumPolymerase Chain ReactionProtozoan ProteinsSeroepidemiologic StudiesAntibodies, ProtozoanAntigens, Protozoanmerozoite surface protein 3, PlasmodiumPfs230 antigen, Plasmodium falciparumProtozoan ProteinsAntibodiesMalariaMSP3Pfs230SeroprevalenceTransmission

Identifiers

PMID29304870
PMCPMC5755320
OpenAlexW2781684772

What OpenQuestion holds

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LicenceCC BY
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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.