Evidence map›Paper›PMID 33615281›Full record

ArticleThe Lancet. Microbe2021

Xenodiagnosis to evaluate the infectiousness of humans to sandflies in an area endemic for visceral leishmaniasis in Bihar, India: a transmission-dynamics study.

Om Prakash Singh, Puja Tiwary, Anurag Kumar Kushwaha, Shakti Kumar Singh, Dhiraj Kumar Singh, Phillip Lawyer, Edgar Rowton, Rahul Chaubey, Abhishek Kumar Singh, Tulika Kumari Rai and 4 more

Open access · goldAbstract read
In one paragraph

Article in The Lancet. Microbe, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
14.7field-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

61 citing papers in PubMed, 90 citations in OpenAlex.

  1. Trial
  2. Trial
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  4. Review
  5. Insights into animal reservoir hosts for the circulation ofOne health (Amsterdam, Netherlands) · 2026
    Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Leishmaniasis.Nature reviews. Disease primers · 2025
    Review
  12. Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Amphotericin B Deoxycholate Treatment of Post-Kala-Azar Dermal Leishmaniasis in India.The American journal of tropical medicine and hygiene · 2024
    Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors at 6 institutions in 3 countries.

Om Prakash SinghDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Puja TiwaryDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Anurag Kumar KushwahaDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Shakti Kumar SinghKala-Azar Medical Research Center, Muzaffarpur, Bihar, India.
Dhiraj Kumar SinghKala-Azar Medical Research Center, Muzaffarpur, Bihar, India.
Phillip LawyerLaboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Edgar RowtonDivision of Entomology, Walter Reed Army Institute of Research, Silver Spring, MD, USA.
Rahul ChaubeyKala-Azar Medical Research Center, Muzaffarpur, Bihar, India.
Abhishek Kumar SinghDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Tulika Kumari RaiDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Michael P FayBiostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Jaya ChakravartyDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
David SacksLaboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Shyam SundarDepartment of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
Banaras Hindu University · INKala-Azar Medical Research CentreInstitute of Medical Sciences · INNational Institutes of Health · USNational Institute of Allergy and Infectious Diseases · USWalter Reed Army Institute of Research · US

Funding

Vector Biological Studies in LeishmaniasisZIAAI000256 · NIAID · NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES · PI SACKS, DAVID · 2009 to 2025
$12.5M
6 · The paper itself

Abstract

backgroundVisceral leishmaniasis, also known on the Indian subcontinent as kala-azar, is a fatal form of leishmaniasis caused by the protozoan parasite

methodsIn this prospective xenodiagnosis study done in Muzaffarpur district of Bihar, India, we included patients with clinically confirmed active visceral leishmaniasis or post-kala-azar dermal leishmaniasis who presented to the Kala-Azar Medical Research Center. These participants received treatment for

findingsBetween July 12, 2016, and March 19, 2019, we recruited 287 individuals, including 77 with active visceral leishmaniasis, 26 with post-kala-azar dermal leishmaniasis, and 184 with asymptomatic infection. Of the patients with active visceral leishmaniasis, 42 (55%) were deemed infectious to sandflies by microscopy and 60 (78%) by qPCR before treatment. No patient with visceral leishmaniasis was found to be infectious by microscopy at 30 days after treatment, although six (8%) were still positive by qPCR. Before treatment, 11 (42%) of 26 patients with post-kala-azar dermal leishmaniasis were deemed infectious to sandflies by microscopy and 23 (88%) by qPCR. Of 23 patients who were available for xenodiagnosis after treatment, one remained infectious to flies by qPCR on the pooled flies, but none remained positive by microscopy. None of the 184 asymptomatic participants were infectious to sandflies.

interpretationThese findings confirm that patients with active visceral leishmaniasis and patients with post-kala-azar dermal leishmaniasis can transmit

fundingBill & Melinda Gates Foundation.

Indexed as

Leishmaniasis, VisceralPhlebotomusPsychodidaeAnimalsAsymptomatic InfectionsFemaleHumansIndiaMaleProspective StudiesXenodiagnosis

Identifiers

PMID33615281
PMCPMC7869864
OpenAlexW3119308122

What OpenQuestion holds

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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.