Evidence map›Paper›PMID 34449764›Full record

ArticlePLoS neglected tropical diseases2021

Identification of the asymptomatic Plasmodium falciparum and Plasmodium vivax gametocyte reservoir under different transmission intensities.

Cristian Koepfli, Wang Nguitragool, Anne Cristine Gomes de Almeida, Andrea Kuehn, Andreea Waltmann, Eline Kattenberg, Maria Ome-Kaius, Patricia Rarau, Thomas Obadia, James Kazura and 9 more

Open access · goldAbstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
3.5field-weighted citation impact, top 7% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
  2. High-AltitudeOpen forum infectious diseases · 2026
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  5. Evaluation ofiScience · 2025
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  7. Observational
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  11. Article
  12. Article
  13. Monitoring the density of3 Biotech · 2023
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Frontiers in cellular and infection microbiology · 2021
    Review
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 11 institutions in 9 countries.

Cristian KoepfliPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.ORCID 0000-0002-9354-0414
Wang NguitragoolDepartment of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID 0000-0002-5484-7130
Anne Cristine Gomes de AlmeidaFundação de Medicina Tropical Dr. Heitor Vieira Dourado (FMT-HVD), Manaus, Brazil.ORCID 0000-0002-6815-6680
Andrea KuehnISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.
Andreea WaltmannPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.
Eline KattenbergPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.ORCID 0000-0002-2971-5136
Maria Ome-KaiusPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.ORCID 0000-0002-7094-474X
Patricia RarauPapua New Guinea Institute of Medical Research, Madang, Papua New Guinea.ORCID 0000-0003-0795-4686
Thomas ObadiaHub de Bioinformatique et Biostatistique, Département Biologie Computationnelle, Institut Pasteur, Paris, France.
James KazuraCentre for Global Health & Diseases, Case Western Reserve University, Cleveland, Ohio, United States of America.ORCID 0000-0002-6390-634X
Wuelton MonteiroFundação de Medicina Tropical Dr. Heitor Vieira Dourado (FMT-HVD), Manaus, Brazil.
Andrew W DarcyNational Health Training and Research Institute, Ministry of Health, Honiara, Solomon Islands.
Lyndes WiniVector Borne Diseases Program, Ministry of Health, Honiara, Solomon Islands.
Quique BassatISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.ORCID 0000-0003-0875-7596
Ingrid FelgerSwiss Tropical and Public Health Institute, Basel, Switzerland.ORCID 0000-0003-1255-2606
Jetsumon SattabongkotMahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.ORCID 0000-0002-3938-4588
Leanne J RobinsonPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.ORCID 0000-0001-9903-1023
Marcus LacerdaFundação de Medicina Tropical Dr. Heitor Vieira Dourado (FMT-HVD), Manaus, Brazil.
Ivo MuellerPopulation Health & Immunity Division, Walter & Eliza Hall Institute, Parkville, Australia.
Fundação de Medicina Tropical · BRInstitut Pasteur · FRMahidol University · THThe University of Melbourne · AUWalter and Eliza Hall Institute of Medical Research · AUBarcelona Institute for Global Health · ESCase Western Reserve University · USInstitució Catalana de Recerca i Estudis Avançats · ESPapua New Guinea Institute of Medical Research · PGSwiss Tropical and Public Health Institute · CHUniversity of Notre Dame · US

Funding

TransmissionU19AI089686 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI KAZURA, JAMES WALTER · 2010 to 2016
$9.9M
Understanding, tracking and eliminating malaria transmission in the Asia - Pacific RegionU19AI129392 · NIAID · WALTER AND ELIZA HALL INST MEDICAL RES · PI Ivo J Mueller · 2017 to 2026
$7.1M
NIAID NIH HHS U19 AI089686NIAID NIH HHS U19 AI129392
6 · The paper itself

Abstract

backgroundUnderstanding epidemiological variables affecting gametocyte carriage and density is essential to design interventions that most effectively reduce malaria human-to-mosquito transmission. METHODOLOGY/PRINCIPAL

findingsPlasmodium falciparum and P. vivax parasites and gametocytes were quantified by qPCR and RT-qPCR assays using the same methodologies in 5 cross-sectional surveys involving 16,493 individuals in Brazil, Thailand, Papua New Guinea, and Solomon Islands. The proportion of infections with detectable gametocytes per survey ranged from 44-94% for P. falciparum and from 23-72% for P. vivax. Blood-stage parasite density was the most important predictor of the probability to detect gametocytes. In moderate transmission settings (prevalence by qPCR>5%), parasite density decreased with age and the majority of gametocyte carriers were children. In low transmission settings (prevalence<5%), >65% of gametocyte carriers were adults. Per survey, 37-100% of all individuals positive for gametocytes by RT-qPCR were positive by light microscopy for asexual stages or gametocytes (overall: P. falciparum 178/348, P. vivax 235/398). CONCLUSIONS/SIGNIFICANCE: Interventions to reduce human-to-mosquito malaria transmission in moderate-high endemicity settings will have the greatest impact when children are targeted. In contrast, all age groups need to be included in control activities in low endemicity settings to achieve elimination. Detection of infections by light microscopy is a valuable tool to identify asymptomatic blood stage infections that likely contribute most to ongoing transmission at the time of sampling.

Indexed as

AdolescentAsymptomatic DiseasesBrazilChildChild, PreschoolCross-Sectional StudiesFemaleHumansInfantMalaria, FalciparumMalaria, VivaxMalePapua New GuineaPlasmodium falciparumPlasmodium vivaxThailand

Identifiers

PMID34449764
PMCPMC8428688
OpenAlexW3195336742

What OpenQuestion holds

Textmetadata
LicenceCC BY
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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.