Evidence map›Paper›PMID 31153899›Full record

ArticleInternational journal for parasitology2019

Evolutionary sex allocation theory explains sex ratios in natural Plasmodium falciparum infections.

Petra Schneider, Hamza A Babiker, Amal A H Gadalla, Sarah E Reece

Abstract read
In one paragraph

Article in International journal for parasitology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–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

5 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Prevalence of asymptomaticWellcome open research · 2020
    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

4 authors.

Petra SchneiderInstitute of Evolutionary Biology & Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Charlotte Auerbach Road, Edinburgh EH9 3FL, United Kingdom. Electronic address: petra.schneider@ed.ac.uk.
Hamza A BabikerCollege of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, Alkhoud 123, Oman.
Amal A H GadallaCollege of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, Alkhoud 123, Oman; Division of Population Medicine. School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom.
Sarah E ReeceInstitute of Evolutionary Biology & Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Charlotte Auerbach Road, Edinburgh EH9 3FL, United Kingdom.

Funding

Wellcome Trust 082234Wellcome Trust 202769/Z/16/ZWellcome Trust WT082234MA
6 · The paper itself

Abstract

Malaria transmission is achieved by sexual stages, called gametocytes, and the proportion of gametocytes that are male versus female (sex ratio) influences transmission success. In malaria model systems, variation in gametocyte sex ratios can be explained by the predictions of evolutionary sex allocation theory. We test these predictions using natural Plasmodium falciparum infections. The predicted negative correlation between sex ratio and gametocyte density holds: the sex ratio increases when gametocyte densities decrease, and this is most apparent in single genotype infections and in the dry season. We do not observe higher gametocyte sex ratios in mixed compared with single genotype infections.

Indexed as

Biological EvolutionAnimalsChi-Square DistributionFemaleGenotypeLinear ModelsLogistic ModelsMalaria, FalciparumMalePlasmodium falciparumSeasonsSex RatioCompetitionFertility insuranceGametocyte densityLocal mate competitionSeasonal malaria transmissionSex allocation

Identifiers

PMID31153899
PMCPMC7614805

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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.