Evidence map›Paper›PMID 26651993›Full record

ArticleMalaria journal2015

Clonal population expansion in an outbreak of Plasmodium falciparum on the northwest coast of Ecuador.

Fabián E Sáenz, Lindsay C Morton, Sheila Akinyi Okoth, Gabriela Valenzuela, Claudia A Vera-Arias, Eileen Vélez-Álvarez, Naomi W Lucchi, L Enrique Castro, Venkatachalam Udhayakumar

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 2 pooled it
1.7field-weighted citation impact, top 14% 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

27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 55 citations in OpenAlex.

  1. Pooled it
  2. Prevalence ofBulletin of the World Health Organization · 2020
    Pooled it
  3. Review
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  5. Towards an evolutionary baseline model ofbioRxiv : the preprint server for biology · 2025
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  6. Article
  7. Review
  8. Review
  9. High Frequency of Deletions in theTropical medicine and infectious disease · 2024
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  10. Article
  11. Article
  12. Molecular epidemiology of continuedFrontiers in tropical diseases · 2023
    Article
  13. Article
  14. Article
  15. High-throughputeLife · 2022
    Article
  16. Prevalence of gestational malaria in EcuadorBiomedica : revista del Instituto Nacional de Salud · 2022
    Article
  17. Molecular Identification ofPathogens (Basel, Switzerland) · 2021
    Article
  18. Article
  19. Article
  20. 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

9 authors at 3 institutions in 2 countries.

Fabián E SáenzCentro de Investigación en Enfermedades Infecciosas y Crónicas, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Ave. 12 de Octubre 1076 y Roca, Quito, Ecuador. fsaenz213@puce.edu.ec.
Lindsay C MortonMalaria Branch, Division of Parasitic Diseases and Malaria, Centers for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA. lmorton@umaryland.edu.
Sheila Akinyi OkothMalaria Branch, Division of Parasitic Diseases and Malaria, Centers for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA. jyo3@cdc.gov.
Gabriela ValenzuelaCentro de Investigación en Enfermedades Infecciosas y Crónicas, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Ave. 12 de Octubre 1076 y Roca, Quito, Ecuador. vgabriela_paola@hotmail.com.
Claudia A Vera-AriasCentro de Investigación en Enfermedades Infecciosas y Crónicas, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Ave. 12 de Octubre 1076 y Roca, Quito, Ecuador. claudia.vera.arias@gmail.com.
Eileen Vélez-ÁlvarezCentro de Investigación en Enfermedades Infecciosas y Crónicas, Escuela de Ciencias Biológicas, Pontificia Universidad Católica del Ecuador, Ave. 12 de Octubre 1076 y Roca, Quito, Ecuador. ecvelezalvarez@gmail.com.
Naomi W LucchiMalaria Branch, Division of Parasitic Diseases and Malaria, Centers for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA. frd9@cdc.gov.
L Enrique CastroMinisterio de Salud Pública, Guayaquil, Ecuador. lenriquecastro56@hotmail.com.
Venkatachalam UdhayakumarMalaria Branch, Division of Parasitic Diseases and Malaria, Centers for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA. vxu0@cdc.gov.
Centers for Disease Control and Prevention · USPontificia Universidad Católica del Ecuador · ECMinisterio de Salud Pública · EC

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDetermining the source of malaria outbreaks in Ecuador and identifying remaining transmission foci will help in malaria elimination efforts. In this study, the genetic signatures of Plasmodium falciparum isolates, obtained from an outbreak that occurred in northwest Ecuador from 2012 to 2013, were characterized.

methodsMolecular investigation of the outbreak was performed using neutral microsatellites, drug resistance markers and pfhrp2 and pfhrp3 genotyping.

resultsA majority of parasite isolates (31/32) from this outbreak were of a single clonal type that matched a clonal lineage previously described on the northern coast of Peru and a historical isolate from Ecuador. All but one isolate carried a chloroquine-resistant pfcrt genotype and sulfadoxine- and pyrimethamine-sensitive pfdhps and pfdhfr genotypes. Pfmdr1 mutations were identified in codons 184 and 1042. In addition, most samples (97 %) showed presence of pfhrp2 gene.

conclusionsThis study indicates that parasites from a single clonal lineage largely contributed to this outbreak and this lineage was found to be genetically related to a lineage previously reported in the Peruvian coast and historical Ecuadorian parasites.

Identifiers

PMID26651993
PMCPMC4676133
OpenAlexW2194782942

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.