Evidence map›Paper›PMID 31164664›Full record

ArticleScientific reports2019

An analysis of large structural variation in global Plasmodium falciparum isolates identifies a novel duplication of the chloroquine resistance associated gene.

Matt Ravenhall, Ernest Diez Benavente, Colin J Sutherland, David A Baker, Susana Campino, Taane G Clark

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
2.9field-weighted citation impact, top 10% 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

14 citing papers in PubMed, 22 citations in OpenAlex.

  1. bioRxiv : the preprint server for biology · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Pf8: an open dataset ofWellcome open research · 2025
    Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. 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

6 authors at 2 institutions in 1 country.

Matt RavenhallDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.ORCID http://orcid.org/0000-0002-7818-2348
Ernest Diez BenaventeDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.ORCID http://orcid.org/0000-0002-4313-4290
Colin J SutherlandDepartment of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.ORCID http://orcid.org/0000-0003-1592-6407
David A BakerDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.ORCID http://orcid.org/0000-0002-5490-8933
Susana CampinoDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK.
Taane G ClarkDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK. taane.clark@lshtm.ac.uk.ORCID http://orcid.org/0000-0001-8985-9265
University of London · GBLondon School of Hygiene & Tropical Medicine · GB

Funding

Biotechnology and Biological Sciences Research Council BB/J014567/1Biotechnology and Biological Sciences Research Council BB/R013063/1Medical Research Council MR/K000551/1Medical Research Council MR/M01360X/1Medical Research Council MR/N010469/1Medical Research Council MR/R020973/1
6 · The paper itself

Abstract

The evolution of genetic mechanisms for host immune evasion and anti-malarial resistance has enabled the Plasmodium falciparum malaria parasite to inflict high morbidity and mortality on human populations. Most studies of P. falciparum genetic diversity have focused on single-nucleotide polymorphisms (SNPs), assisting the identification of drug resistance-associated loci such as the chloroquine related crt and sulfadoxine-pyrimethamine related dhfr. Whilst larger structural variants are known to impact adaptation, for example, mdr1 duplications with anti-malarial resistance, no large-scale, genome-wide study on clinical isolates has been undertaken using whole genome sequencing data. By applying a structural variant detection pipeline across whole genome sequence data from 2,855 clinical isolates in 21 malaria-endemic countries, we identified >70,000 specific deletions and >600 duplications. Most structural variants are rare (48.5% of deletions and 94.7% of duplications are found in single isolates) with 2.4% of deletions and 0.2% of duplications found in >5% of global isolates. A subset of variants was present at high frequency in drug-resistance related genes including mdr1, the gch1 promoter region, and a putative novel duplication of crt. Regional-specific variants were identified, and a companion visualisation tool has been developed to assist web-based investigation of these polymorphisms by the wider scientific community.

Indexed as

AntimalarialsChloroquineDrug CombinationsDrug ResistanceGene DeletionGene DuplicationGenomeGenome-Wide Association StudyGenotypeHumansMalaria, FalciparumPlasmodium falciparumPolymorphism, Single NucleotidePyrimethamineSulfadoxineTetrahydrofolate DehydrogenaseAntimalarialsChloroquineDrug Combinationsfanasil, pyrimethamine drug combinationPyrimethamineSulfadoxineTetrahydrofolate Dehydrogenase

Identifiers

PMID31164664
PMCPMC6547842
OpenAlexW2948663202

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.