Evidence map›Paper›PMID 31830038›Full record

ArticlePLoS neglected tropical diseases2019

Genomes of Leishmania parasites directly sequenced from patients with visceral leishmaniasis in the Indian subcontinent.

Malgorzata A Domagalska, Hideo Imamura, Mandy Sanders, Frederik Van den Broeck, Narayan Raj Bhattarai, Manu Vanaerschot, Ilse Maes, Erika D'Haenens, Keshav Rai, Suman Rijal and 3 more

Open access · goldAbstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
7.5field-weighted citation impact, top 2% 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

45 citing papers in PubMed, 72 citations in OpenAlex.

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  12. Phylogenomic reconstruction ofbioRxiv : the preprint server for biology · 2024
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  19. A Rare Case of Imported Cutaneous Leishmaniasis Caused byTropical medicine and infectious disease · 2023
    Article
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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

13 authors at 4 institutions in 3 countries.

Malgorzata A DomagalskaInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.ORCID 0000-0003-0839-0325
Hideo ImamuraInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.ORCID 0000-0002-3282-1319
Mandy SandersWellcome Sanger Institute, Hinxton, United Kingdom.
Frederik Van den BroeckInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.
Narayan Raj BhattaraiBP Koirala Institute of Health Sciences, Dharan, Nepal.
Manu VanaerschotInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.ORCID 0000-0002-9141-2347
Ilse MaesInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.
Erika D'HaenensInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.
Keshav RaiBP Koirala Institute of Health Sciences, Dharan, Nepal.
Suman RijalBP Koirala Institute of Health Sciences, Dharan, Nepal.
Matthew BerrimanWellcome Sanger Institute, Hinxton, United Kingdom.
James A CottonWellcome Sanger Institute, Hinxton, United Kingdom.ORCID 0000-0001-5475-3583
Jean-Claude DujardinInstitute of Tropical Medicine Antwerp, Molecular Parasitology Unit, Antwerp, Belgium.ORCID 0000-0002-9217-5240
Instituut voor Tropische Geneeskunde · BEB.P. Koirala Institute of Health Sciences · NPWellcome Sanger Institute · GBUniversity of Antwerp · BE

Funding

Wellcome TrustWellcome Trust 206194
6 · The paper itself

Abstract

Whole genome sequencing (WGS) is increasingly used for molecular diagnosis and epidemiology of infectious diseases. Current Leishmania genomic studies rely on DNA extracted from cultured parasites, which might introduce sampling and biological biases into the subsequent analyses. Up to now, direct analysis of Leishmania genome in clinical samples is hampered by high levels of human DNA and large variation in parasite load in clinical samples. Here, we present a method, based on target enrichment of Leishmania donovani DNA with Agilent SureSelect technology, that allows the analysis of Leishmania genomes directly in clinical samples. We validated our protocol with a set of artificially mixed samples, followed by the analysis of 63 clinical samples (bone marrow or spleen aspirates) from visceral leishmaniasis patients in Nepal. We were able to identify genotypes using a set of diagnostic SNPs in almost all of these samples (97%) and access comprehensive genome-wide information in most (83%). This allowed us to perform phylogenomic analysis, assess chromosome copy number and identify large copy number variants (CNVs). Pairwise comparisons between the parasite genomes in clinical samples and derived in vitro cultured promastigotes showed a lower aneuploidy in amastigotes as well as genomic differences, suggesting polyclonal infections in patients. Altogether our results underline the need for sequencing parasite genomes directly in the host samples.

Indexed as

GenotypeAdolescentChildChild, PreschoolDNA, ProtozoanHumansInfantLeishmaniaLeishmaniasis, VisceralNepalSpecimen HandlingWhole Genome SequencingDNA, Protozoan

Identifiers

PMID31830038
PMCPMC6932831
OpenAlexW2995359589

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LicenceCC BY
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Registered trials

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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.