Evidence map›Paper›PMID 22966126›Full record

ArticleThe Journal of infectious diseases2012

New insights into acquisition, boosting, and longevity of immunity to malaria in pregnant women.

Freya J I Fowkes, Rose McGready, Nadia J Cross, Mirja Hommel, Julie A Simpson, Salenna R Elliott, Jack S Richards, Kurt Lackovic, Jacher Viladpai-Nguen, David Narum and 4 more

Abstract read
In one paragraph

Article in The Journal of infectious diseases, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

68 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  5. The American journal of tropical medicine and hygiene · 2018
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  13. Current update on malaria in pregnancy: a systematic review.Tropical diseases, travel medicine and vaccines · 2025
    Review
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  20. Serology reveals micro-differences inFrontiers in parasitology · 2023
    Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors.

Freya J I FowkesMacfarlane Burnet Institute of Medical Research, Melbourne, Australia. fowkes@burnet.edu.au
Rose McGready
Nadia J Cross
Mirja Hommel
Julie A Simpson
Salenna R Elliott
Jack S Richards
Kurt Lackovic
Jacher Viladpai-Nguen
David Narum
Takafumi Tsuboi
Robin F Anders
François Nosten
James G Beeson

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundHow antimalarial antibodies are acquired and maintained during pregnancy and boosted after reinfection with Plasmodium falciparum and Plasmodium vivax is unknown.

methodsA nested case-control study of 467 pregnant women (136 Plasmodium-infected cases and 331 uninfected control subjects) in northwestern Thailand was conducted. Antibody levels to P. falciparum and P. vivax merozoite antigens and the pregnancy-specific PfVAR2CSA antigen were determined at enrollment (median 10 weeks gestation) and throughout pregnancy until delivery.

resultsAntibodies to P. falciparum and P. vivax were highly variable over time, and maintenance of high levels of antimalarial antibodies involved highly dynamic responses resulting from intermittent exposure to infection. There was evidence of boosting with each successive infection for P. falciparum responses, suggesting the presence of immunological memory. However, the half-lives of Plasmodium antibody responses were relatively short, compared with measles (457 years), and much shorter for merozoite responses (0.8-7.6 years), compared with PfVAR2CSA responses (36-157 years). The longer half-life of antibodies to PfVAR2CSA suggests that antibodies acquired in one pregnancy may be maintained to protect subsequent pregnancies.

conclusionsThese findings may have important practical implications for predicting the duration of vaccine-induced responses by candidate antigens and supports the development of malaria vaccines to protect pregnant women.

Indexed as

AdultAntibodies, ProtozoanAntimalarialsCase-Control StudiesChloroquineFemaleHumansImmunoglobulin GMalaria, FalciparumMalaria, VivaxPlasmodium falciparumPlasmodium vivaxPregnancyPregnancy Complications, ParasiticThailandYoung AdultAntibodies, ProtozoanAntimalarialsChloroquineImmunoglobulin G

Identifiers

PMID22966126
PMCPMC3475637

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.