Evidence map›Paper›PMID 33684930›Full record

Observational studyClinical infectious diseases : an official publication of the Infectious Diseases Society of America2021

Megasphaera in the Stool Microbiota Is Negatively Associated With Diarrheal Cryptosporidiosis.

Maureen A Carey, Gregory L Medlock, Masud Alam, Mamun Kabir, Md Jashim Uddin, Uma Nayak, Jason Papin, A S G Faruque, Rashidul Haque, William A Petri and 1 more

Registry-linked trialOpen access · hybridAbstract readObservational Study
In one paragraph

Observational study in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02764918 (Field Studies of Cryptosporidiosis and Enteropathogens in Bangladesh), which is not on this map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 8% 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.

NCT02764918 active not recruitingnot on this mapstarted 2024, after this paper: background citation

Field Studies of Cryptosporidiosis and Enteropathogens in Bangladesh

TypeobservationalSponsorUniversity of VirginiaRan2024 to 2029Enrolled150ConditionsCryptosporidiosis
3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. Pooled it
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  9. Current research in parasitology & vector-borne diseases · 2025
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  15. Observational
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  20. Dendritic Cells andMicroorganisms · 2023
    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

11 authors at 2 institutions in 2 countries.

Maureen A CareyDivision of Infectious Diseases and International Health, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA.ORCID 0000-0003-2890-5445
Gregory L MedlockDepartment of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA.
Masud AlamInternational Centre for Diarrhoeal Disease Research, Bangladesh.
Mamun KabirInternational Centre for Diarrhoeal Disease Research, Bangladesh.
Md Jashim UddinDivision of Infectious Diseases and International Health, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA.
Uma NayakDepartment of Public Health Sciences, University of Virginia, Charlottesville, Virginia, USA.
Jason PapinDepartment of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA.
A S G FaruqueInternational Centre for Diarrhoeal Disease Research, Bangladesh.
Rashidul HaqueInternational Centre for Diarrhoeal Disease Research, Bangladesh.
William A PetriDivision of Infectious Diseases and International Health, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA.
Carol A GilchristDivision of Infectious Diseases and International Health, Department of Medicine, University of Virginia, Charlottesville, Virginia, USA.
University of Virginia · USInternational Centre for Diarrhoeal Disease Research · BD

Funding

FIELD STUDIES OF IMMUNITY TO AMEBIASIS IN BANGLADESHR01AI043596 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI CAROL A GILCHRIST, William A Petri · 1998 to 2026
$7.7M
Global Biothreats Training ProgramT32AI055432 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI CRISS, ALISON K, PETRI, WILLIAM A · 2003 to 2022
$4.0M
Transdisciplinary Big Data Science Training at UVaT32LM012416 · NLM · UNIVERSITY OF VIRGINIA · PI BROWN, DONALD E, LOUGHRAN, THOMAS P. · 2016 to 2020
$1.3M
Cryptosporidia GenomicsR21AI142656 · NIAID · UNIVERSITY OF VIRGINIA · PI GILCHRIST, CAROL A · 2019 to 2020
$432k
Bill and Melinda Gates Foundation OPP1100514NIAID NIH HHS R01 AI043596NIAID NIH HHS R21 AI142656NIAID NIH HHS T32 AI055432NIH HHS R01 AI043596NLM NIH HHS T32 LM012416University of Virginia
6 · The paper itself

Abstract

backgroundThe protozoan parasites in the Cryptosporidium genus cause both acute diarrheal disease and subclinical (ie, nondiarrheal) disease. It is unclear if the microbiota can influence the manifestation of diarrhea during a Cryptosporidium infection.

methodsTo characterize the role of the gut microbiota in diarrheal cryptosporidiosis, the microbiome composition of both diarrheal and surveillance Cryptosporidium-positive fecal samples from 72 infants was evaluated using 16S ribosomal RNA gene sequencing. Additionally, the microbiome composition prior to infection was examined to test whether a preexisting microbiome profile could influence the Cryptosporidium infection phenotype.

resultsFecal microbiome composition was associated with diarrheal symptoms at 2 timepoints. Megasphaera was significantly less abundant in diarrheal samples compared with subclinical samples at the time of Cryptosporidium detection (log2 [fold change] = -4.3; P = 10-10) and prior to infection (log2 [fold change] = -2.0; P = 10-4); this assigned sequence variant was detected in 8 children who had diarrhea and 30 children without diarrhea. Random forest classification also identified Megasphaera abundance in the pre- and postexposure microbiota as predictive of a subclinical infection.

conclusionsMicrobiome composition broadly, and specifically low Megasphaera abundance, was associated with diarrheal symptoms prior to and at the time of Cryptosporidium detection. This observation suggests that the gut microenvironment may play a role in determining the severity of a Cryptosporidium infection. Clinical Trials Registration. NCT02764918.

Indexed as

CryptosporidiosisCryptosporidiumMicrobiotaDiarrheaFecesHumansInfantMegasphaeraBangladeshCryptosporidiumdiarrheamicrobiome/microbiotaparasite

Identifiers

PMID33684930
PMCPMC8442784
OpenAlexW3134489910

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.