Evidence map›Paper›PMID 26681777›Full record

ArticleThe Journal of infectious diseases2016

Numerical Distributions of Parasite Densities During Asymptomatic Malaria.

Mallika Imwong, Kasia Stepniewska, Rupam Tripura, Thomas J Peto, Khin Maung Lwin, Benchawan Vihokhern, Klanarong Wongsaen, Lorenz von Seidlein, Mehul Dhorda, Georges Snounou and 9 more

Open access · hybridAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 93 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
93citing papers in PubMed, 4 pooled it
16.5field-weighted citation impact, top 1% 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

93 citing papers in PubMed, 4 syntheses or guidelines pooled it, 137 citations in OpenAlex.

  1. Pooled it
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  10. Review
  11. Article
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  17. Modeling the within-host dynamics ofProceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  18. Artemisinin-resistant malaria.Clinical microbiology reviews · 2024
    Review
  19. Article
  20. Article

33 more citing papers are in PubMed but not listed here.

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

19 authors at 9 institutions in 5 countries.

Mallika ImwongMahidol Oxford Research Unit Department of Molecular Tropical Medicine and Genetics.
Kasia StepniewskaCentre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford WWARN, Churchill Hospital, Oxford, United Kingdom.
Rupam TripuraMahidol Oxford Research Unit.
Thomas J PetoMahidol Oxford Research Unit.
Khin Maung LwinShoklo Malaria Research Unit, Faculty of Tropical Medicine, Mahidol University, Tak, Thailand.
Benchawan VihokhernShoklo Malaria Research Unit, Faculty of Tropical Medicine, Mahidol University, Tak, Thailand.
Klanarong WongsaenShoklo Malaria Research Unit, Faculty of Tropical Medicine, Mahidol University, Tak, Thailand.
Lorenz von SeidleinMahidol Oxford Research Unit Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford.
Mehul DhordaWorldWide Antimalarial Resistance Network (WWARN).
Georges SnounouSorbonne Universités, UPMC Univ Paris 06, UPMC UMRS CR7 Centre d'Immunologie et de Maladies Infectieuses-Paris, Institut National de la Santé et de la Recherche Medicale U1135-Centre National de la Recherche Scientifique ERL 8255, Paris, France.
Lilly KeereecharoenShoklo Malaria Research Unit, Faculty of Tropical Medicine, Mahidol University, Tak, Thailand.
Pratap SinghasivanonDepartment of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok.
Pasathorn SirithiranontMahidol Oxford Research Unit.
Jem ChalkMahidol Oxford Research Unit.
Chea NguonNational Center for Parasitology, Entomology, and Malaria Control, Phnom Penh, Cambodia.
Nicholas P J DayMahidol Oxford Research Unit Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford.
Francois NostenMahidol Oxford Research Unit Shoklo Malaria Research Unit, Faculty of Tropical Medicine, Mahidol University, Tak, Thailand Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford.
Arjen DondorpMahidol Oxford Research Unit Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford.
Nicholas J WhiteMahidol Oxford Research Unit Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford.
Oxford Research (Norway) · NOMahidol University · THShoklo Malaria Research Unit · THAngkor Hospital for Children · KHUniversity of Oxford · GBCambodia National Malaria Center · KHChurchill Hospital · GBSorbonne Université · FRWorldwide Veterinary Service · GB

Funding

Wellcome Trust 093956Wellcome Trust 101148Wellcome Trust award101148
6 · The paper itself

Abstract

backgroundAsymptomatic parasitemia is common even in areas of low seasonal malaria transmission, but the true proportion of the population infected has not been estimated previously because of the limited sensitivity of available detection methods.

methodsCross-sectional malaria surveys were conducted in areas of low seasonal transmission along the border between eastern Myanmar and northwestern Thailand and in western Cambodia. DNA was quantitated by an ultrasensitive polymerase chain reaction (uPCR) assay (limit of accurate detection, 22 parasites/mL) to characterize parasite density distributions for Plasmodium falciparum and Plasmodium vivax, and the proportions of undetected infections were imputed.

resultsThe prevalence of asymptomatic malaria as determined by uPCR was 27.5% (1303 of 4740 people tested). Both P. vivax and P. falciparum density distributions were unimodal and log normal, with modal values well within the quantifiable range. The estimated proportions of all parasitemic individuals identified by uPCR were >70% among individuals infected with P. falciparum and >85% among those infected with P. vivax. Overall, 83% of infections were predicted to be P. vivax infections, 13% were predicted to be P. falciparum infections, and 4% were predicted to be mixed infections. Geometric mean parasite densities were similar; 5601 P. vivax parasites/mL and 5158 P. falciparum parasites/mL.

conclusionsThis uPCR method identified most infected individuals in malaria-endemic areas. Malaria parasitemia persists in humans at levels that optimize the probability of generating transmissible gametocyte densities without causing illness.

Indexed as

AdolescentAdultAsia, SoutheasternChildChild, PreschoolCross-Sectional StudiesFemaleHumansInfantMalaria, FalciparumMalaria, VivaxMaleParasitemiaPrevalenceYoung Adultasymptomatic parasitemiamalariaPCRPlasmodium falciparumPlasmodium vivax

Identifiers

PMID26681777
PMCPMC4799672
OpenAlexW2299302365

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.