Evidence map›Paper›PMID 21109587›Full record

ArticleMolecular biology and evolution2011

Plasmodium falciparum genetic diversity maintained and amplified over 5 years of a low transmission endemic in the Peruvian Amazon.

Oralee H Branch, Patrick L Sutton, Carmen Barnes, Juan Carlos Castro, Julie Hussin, Philip Awadalla, Gisely Hijar

Abstract read
In one paragraph

Article in Molecular biology and evolution, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing 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

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

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Genetic diversity and haplotype structure of theFrontiers in cellular and infection microbiology · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Molecular epidemiology of continuedFrontiers in tropical diseases · 2023
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. 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

7 authors.

Oralee H BranchDepartment of Medical Parasitology, New York University, USA. oralee.branch@nyumc.org
Patrick L Sutton
Carmen Barnes
Juan Carlos Castro
Julie Hussin
Philip Awadalla
Gisely Hijar

Funding

Malaria: Immunity and Diversity in Low TransmissionR01AI064831 · NIAID · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI BRANCH, ORALEE H · 2006 to 2010
$2.3M
P. falciparum Pathways and Pathology: RBC Invasion in the Peruvian Malaria CohortR03TW008064 · FIC · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI BRANCH, ORALEE H · 2008 to 2010
$107k
CIHR 200183FIC NIH HHS R03 TW008064Howard Hughes Medical InstituteNIAID NIH HHS R01 AI064831
6 · The paper itself

Abstract

Plasmodium falciparum entered into the Peruvian Amazon in 1994, sparking an epidemic between 1995 and 1998. Since 2000, there has been sustained low P. falciparum transmission. The Malaria Immunology and Genetics in the Amazon project has longitudinally followed members of the community of Zungarococha (N = 1,945, 4 villages) with active household and health center-based visits each year since 2003. We examined parasite population structure and traced the parasite genetic diversity temporally and spatially. We genotyped infections over 5 years (2003-2007) using 14 microsatellite (MS) markers scattered across ten different chromosomes. Despite low transmission, there was considerable genetic diversity, which we compared with other geographic regions. We detected 182 different haplotypes from 302 parasites in 217 infections. Structure v2.2 identified five clusters (subpopulations) of phylogenetically related clones. To consider genetic diversity on a more detailed level, we defined haplotype families (hapfams) by grouping haplotypes with three or less loci differences. We identified 34 different hapfams identified. The F(st) statistic and heterozygosity analysis showed the five clusters were maintained in each village throughout this time. A minimum spanning network (MSN), stratified by the year of detection, showed that haplotypes within hapfams had allele differences and haplotypes within a cluster definition were more separated in the later years (2006-2007). We modeled hapfam detection and loss, accounting for sample size and stochastic fluctuations in frequencies overtime. Principle component analysis of genetic variation revealed patterns of genetic structure with time rather than village. The population structure, genetic diversity, appearance/disappearance of the different haplotypes from 2003 to 2007 provides a genome-wide "real-time" perspective of P. falciparum parasites in a low transmission region.

Indexed as

Genetic VariationBayes TheoremEndemic DiseasesHaplotypesHumansLongitudinal StudiesMalaria, FalciparumMicrosatellite RepeatsPeruPhylogenyPlasmodium falciparumPolymerase Chain ReactionPrincipal Component AnalysisStatistics, Nonparametric

Identifiers

PMID21109587
PMCPMC3112368

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.