Evidence map›Paper›PMID 28924231›Full record

Trial reportScientific reports2017

Population genomics of virulence genes of Plasmodium falciparum in clinical isolates from Uganda.

Shazia Ruybal-Pesántez, Kathryn E Tiedje, Gerry Tonkin-Hill, Thomas S Rask, Moses R Kamya, Bryan Greenhouse, Grant Dorsey, Michael F Duffy, Karen P Day

Erratum issuedOpen access · goldAbstract readClinical TrialMulticenter Study
In one paragraph

Trial report in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 8% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 48 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Metagenomic analysis reveals extreme complexity ofmedRxiv : the preprint server for health sciences · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. A paradoxical population structure ofbioRxiv : the preprint server for biology · 2023
    Article
  12. Article
  13. Article
  14. Molecular epidemiology of continuedFrontiers in tropical diseases · 2023
    Article
  15. Article
  16. UnravellingFrontiers in parasitology · 2022
    Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 3 countries.

Shazia Ruybal-PesántezSchool of BioSciences, Bio21 Institute/University of Melbourne, Melbourne, Australia.
Kathryn E TiedjeSchool of BioSciences, Bio21 Institute/University of Melbourne, Melbourne, Australia.
Gerry Tonkin-HillWalter and Eliza Hall Institute, Melbourne, Australia.
Thomas S RaskSchool of BioSciences, Bio21 Institute/University of Melbourne, Melbourne, Australia.
Moses R KamyaSchool of Medicine, Makerere University College of Health Sciences, Kampala, Uganda.
Bryan GreenhouseDepartment of Medicine, University of California, San Francisco, USA.
Grant DorseyDepartment of Medicine, University of California, San Francisco, USA.
Michael F DuffySchool of BioSciences, Bio21 Institute/University of Melbourne, Melbourne, Australia.
Karen P DaySchool of BioSciences, Bio21 Institute/University of Melbourne, Melbourne, Australia. Karen.Day@unimelb.edu.au.
The University of Melbourne · AUUniversity of California, San Francisco · USMakerere University · UGWalter and Eliza Hall Institute of Medical Research · AU

Funding

P.falciparum var gene diversity and malaria controlR01AI084156 · NIAID · UNIVERSITY OF MELBOURNE · PI DAY, KAREN PATRICIA · 2010 to 2014
$1.9M
The impact of seasonality and vector control on the population structure of Plasmodium falciparumR01TW009670 · FIC · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI DAY, KAREN PATRICIA, KORAM, KWADWO ANSAH · 2013 to 2016
$1.8M
FIC NIH HHS R01 TW009670NIAID NIH HHS R01 AI084156
6 · The paper itself

Abstract

Plasmodium falciparum causes a spectrum of malarial disease from asymptomatic to uncomplicated through to severe. Investigations of parasite virulence have associated the expression of distinct variants of the major surface antigen of the blood stages known as Pf EMP1 encoded by up to 60 var genes per genome. Looking at the population genomics of var genes in cases of uncomplicated malaria, we set out to determine if there was any evidence of a selective sweep of specific var genes or clonal epidemic structure related to the incidence of uncomplicated disease in children. By sequencing the conserved DBLα domain of var genes from six sentinel sites in Uganda we found that the parasites causing uncomplicated P. falciparum disease in children were highly diverse and that every child had a unique var DBLα repertoire. Despite extensive var DBLα diversity and minimal overlap between repertoires, specific DBLα types and groups were conserved at the population level across Uganda. This pattern was the same regardless of the geographic distance or malaria transmission intensity. These data lead us to propose that any parasite can cause uncomplicated malarial disease and that these diverse parasite repertoires are composed of both upsA and non-upsA var gene groups.

Indexed as

Genetic VariationPlasmodium falciparumChildChild, PreschoolFemaleHumansInfantMalaria, FalciparumMaleProtozoan ProteinsUgandaProtozoan Proteins

Identifiers

PMID28924231
PMCPMC5603532
OpenAlexW2753961871

What OpenQuestion holds

Textmetadata
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.