Evidence map›Paper›PMID 20868504›Full record

ArticleBMC infectious diseases2010

A cohort study of Plasmodium falciparum infection dynamics in Western Kenya Highlands.

Frederick N Baliraine, Yaw A Afrane, Dolphine A Amenya, Mariangela Bonizzoni, Anne M Vardo-Zalik, David M Menge, Andrew K Githeko, Guiyun Yan

Abstract read
In one paragraph

Article in BMC infectious diseases, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Dynamics of Afebrile Plasmodium falciparum Infections in Mozambican Men.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2018
    Trial
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  8. Geographic-genetic analysis ofWellcome open research · 2017
    Article
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  13. Review
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  15. The evolution of drug resistance and the curious orthodoxy of aggressive chemotherapy.Proceedings of the National Academy of Sciences of the United States of America · 2011
    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

8 authors.

Frederick N BaliraineDepartment of Medicine, Division of Infectious Diseases, University of California-San Francisco, CA 94143-0811, USA. fbaliraine@daad-alumni.de
Yaw A Afrane
Dolphine A Amenya
Mariangela Bonizzoni
Anne M Vardo-Zalik
David M Menge
Andrew K Githeko
Guiyun Yan

Funding

Ecology of African Highland MalariaR01AI050243 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI YAN, GUIYUN · 2001 to 2018
$8.8M
Research Training in Mosquito Genomics and Bioinformat*D43TW001505 · FIC · UNIVERSITY OF CALIFORNIA-IRVINE · PI Guiyun Yan · 2000 to 2026
$6.0M
Population Genetics of Malaria Parasites in African HighlandsR03TW007360 · FIC · UNIVERSITY OF CALIFORNIA-IRVINE · PI YAN, GUIYUN · 2005 to 2007
$118k
FIC NIH HHS D43 TW001505FIC NIH HHS R03 TW007360NIAID NIH HHS R01 AI050243
6 · The paper itself

Abstract

backgroundThe Kenyan highlands were malaria-free before the 1910s, but a series of malaria epidemics have occurred in the highlands of western Kenya since the 1980s. Longitudinal studies of the genetic structure, complexity, infection dynamics, and duration of naturally acquired Plasmodium falciparum infections are needed to facilitate a comprehensive understanding of malaria epidemiology in the complex Kenyan highland eco-epidemiological systems where malaria recently expanded, as well as the evaluation of control measures.

methodsWe followed a cohort of 246 children residing in 3 villages at altitudes 1430 - 1580 m in western Kenya. Monthly parasitological surveys were undertaken for one year, yielding 866 P. falciparum isolates that were analyzed using 10 microsatellite markers.

resultsInfection complexity and genetic diversity were high (HE = 0.787-0.816), with ≥83% of infections harboring more than one parasite clone. Diversity remained high even during the low malaria transmission season. There was no significant difference between levels of genetic diversity and population structure between high and low transmission seasons. Infection turn-over rate was high, with the average infection duration of single parasite genotypes being 1.11 months, and the longest genotype persistence was 3 months.

conclusionsThese data demonstrate that despite the relatively recent spread of malaria to the highlands, parasite populations seem to have stabilized with no evidence of bottlenecks between seasons, while the ability of residents to clear or control infections indicates presence of effective anti-plasmodial immune mechanisms.

Indexed as

Genetic VariationAdolescentChildChild, PreschoolDNA, ProtozoanGenotypeHumansIncidenceKenyaLinkage DisequilibriumLongitudinal StudiesMalaria, FalciparumMicrosatellite RepeatsPlasmodium falciparumPopulation DensitySeasonsDNA, Protozoan

Identifiers

PMID20868504
PMCPMC2955685

What OpenQuestion holds

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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.