Evidence map›Paper›PMID 28680146›Full record

ArticleNature communications2017

Skin parasite landscape determines host infectiousness in visceral leishmaniasis.

Johannes S P Doehl, Zoe Bright, Shoumit Dey, Helen Davies, John Magson, Najmeeyah Brown, Audrey Romano, Jane E Dalton, Ana I Pinto, Jon W Pitchford and 1 more

Abstract read
In one paragraph

Article in Nature communications, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing 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

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

  1. Pooled it
  2. Trial
  3. Article
  4. Pathogens (Basel, Switzerland) · 2026
    Article
  5. Leishmaniasis.Nature reviews. Disease primers · 2025
    Review
  6. Article
  7. Article
  8. Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2024
    Review
  9. Article
  10. Article
  11. Article
  12. Clinical performance of a quantitative pan-genusPractical laboratory medicine · 2023
    Article
  13. Infectiousness of AsymptomaticPathogens (Basel, Switzerland) · 2023
    Article
  14. Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  15. Review
  16. Article
  17. Article
  18. Oral and Intragastric: New Routes of Infection byPathogens (Basel, Switzerland) · 2022
    Article
  19. Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors.

Johannes S P DoehlCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
Zoe BrightDepartments of Biology and Mathematics, University of York, York, YO10 5YW, UK.ORCID http://orcid.org/0000-0002-1201-400X
Shoumit DeyCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.ORCID http://orcid.org/0000-0003-2655-9921
Helen DaviesCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
John MagsonFera Science Ltd (Fera), Applied Innovation Campus, Sand Hutton, York, YO41 1LB, UK.
Najmeeyah BrownCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
Audrey RomanoCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
Jane E DaltonCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
Ana I PintoCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK.
Jon W PitchfordDepartments of Biology and Mathematics, University of York, York, YO10 5YW, UK. jon.pitchford@york.ac.uk.
Paul M KayeCentre for Immunology and Infection, Department of Biology and Hull York Medical School, University of York, York, YO10 5DD, UK. paul.kaye@york.ac.uk.ORCID http://orcid.org/0000-0002-8796-4755

Funding

Medical Research Council G1000230
6 · The paper itself

Abstract

Increasing evidence suggests that the infectiousness of patients for the sand fly vector of visceral leishmaniasis is linked to parasites found in the skin. Using a murine model that supports extensive skin infection with Leishmania donovani, spatial analyses at macro-(quantitative PCR) and micro-(confocal microscopy) scales indicate that parasite distribution is markedly skewed. Mathematical models accounting for this heterogeneity demonstrate that while a patchy distribution reduces the expected number of sand flies acquiring parasites, it increases the infection load for sand flies feeding on a patch, increasing their potential for onward transmission. Models representing patchiness at both macro- and micro-scales provide the best fit with experimental sand fly feeding data, pointing to the importance of the skin parasite landscape as a predictor of host infectiousness. Our analysis highlights the skin as a critical site to consider when assessing treatment efficacy, transmission competence and the impact of visceral leishmaniasis elimination campaigns.Parasitemia has been considered the main determinant of visceral leishmaniasis transmission. By combining imaging, qPCR and experimental xenodiagnoses with mathematical models, Doehl et al. argue that the patchy landscape of parasites in the skin is necessary to explain infectiousness.

Indexed as

AnimalsHumansInsect VectorsLeishmania donovaniLeishmaniasis, VisceralMiceModels, BiologicalParasitemiaPsychodidaeSkin

Identifiers

PMID28680146
PMCPMC5498584

What OpenQuestion holds

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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.