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ClinicalTrials.gov public records Last synced Oct 24, 2026, 7:34 AM EDT

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Showing 25–48 of 251 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: stool sample Clear all
Completed No phase listed Observational Accepts healthy volunteers

Stool Microbiome, Pathogens, and Infectious Agents Among Olympic and Elite Athletes

NCT02818413
View directory record Official record
Conditions
Athletic Performance
Interventions
Biospecimen collection and questionnaires
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 29, 2017 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational

Comparison of Gut Microbiota, Inflammation and Symptoms Following Allogeneic HSCT

NCT02398708
View directory record Official record
Conditions
Graft vs Host Disease, Graft Versus Host Disease, Hematopoietic Stem Cell Transplantation, Peripheral Blood Stem Cell Transplantation
Interventions
Questionnaires, Blood Sample, Stool Sample, Clinical data
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 25, 2019 · Synced Oct 24, 2026, 7:34 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Mechanisms of Hypoglycemia in Patients Without Diabetes

NCT04428723
View directory record Official record
Conditions
Hypoglycemia
Interventions
Entry of demographic and medical history data into a deidentified database, Blood sample for DNA analysis, Stool sample for microbiome analysis, Mixed meal tolerance test, Continuous glucose monitoring, activity monitor
Other · Genetic · Diagnostic Test
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 70 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting Phase 1 Interventional

Testing an Immunotherapy Anti-cancer Drug, Nivolumab, for Advanced Cancers in Patients With Autoimmune Disorders, AIM-NIVO

NCT03816345
View directory record Official record
Conditions
Autoimmune Disease, Crohn Disease, Dermatomyositis, Hematopoietic and Lymphoid Cell Neoplasm, Inflammatory Bowel Disease, Malignant Solid Neoplasm, Multiple Sclerosis, Psoriasis, Psoriatic Arthritis, Rheumatoid Arthritis, Sjogren Syndrome, Systemic Lupus Erythematosus, Systemic Scleroderma, Ulcerative Colitis
Interventions
Biospecimen Collection, Cabozantinib, Fluoropyrimidine, Ipilimumab, Nivolumab, Platinum Compound, Platinum Doublet
Procedure · Drug · Biological
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
51
States / cities
Birmingham, Alabama • Palo Alto, California • Sacramento, California + 37 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting Phase 1 Interventional

A Pilot Study of Microbiota Transplant With Antibiotic Preconditioning and Fiber Supplementation in Pulmonary Arterial Hypertension (GUT RESTORE-PAH)

NCT06481852
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
MTT with antibiotic preconditioning + fiber supplementation, MTT with antibiotic preconditioning + placebo supplementation, MTT with placebo + placebo supplementation.
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 31, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 37000: Immunity and Microbiome Studies at Intestinal and Systemic Sites in Ty21a Vaccinated Adults

NCT03970304
View directory record Official record
Conditions
Typhoid Vaccination
Interventions
Vivotif Typhoid Oral Vaccine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Not listed Not applicable Interventional

Intestinal Inflammation and Carbohydrate Digestion in Autistic Children

NCT00227487
View directory record Official record
Conditions
Autism, Inflammation
Interventions
Stool collection, Administration of carbohydrate solution during clinically indicated endoscopy, Questionnaires
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Months to 17 Years
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2017
U.S. locations
2
States / cities
Boston, Massachusetts • Newton, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 30, 2016 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational Results available

Effectiveness of Monovalent Rotavirus Vaccine (RV1)

NCT01871038
View directory record Official record
Conditions
Rotavirus, Acute Gastroenteritis
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
Up to 5 Years
Enrollment
362 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Suspended Phase 1 Interventional

Nivolumab and Ipilimumab With and Without Camu Camu for the Treatment of Patients With Metastatic Renal Cell Carcinoma

NCT06049576
View directory record Official record
Conditions
Clear Cell Renal Cell Carcinoma, Sarcomatoid Renal Cell Carcinoma, Stage III Renal Cell Cancer AJCC v8, Stage IV Renal Cell Cancer AJCC v8
Interventions
Biospecimen Collection, Bone Scan, Computed Tomography, Ipilimumab, Magnetic Resonance Imaging, Myrciaria dubia Prebiotic Supplement, Nivolumab
Procedure · Biological · Drug
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Improving Self-Efficacy, Resolving Inflammaging Allo HSCT Survivors in Personal Training

NCT03609203
View directory record Official record
Conditions
Allogeneic HCT Survivors
Interventions
10 Weeks of Strength Trailing, Group Nutrition Discussion: week 1, week 5 and week 10
Other
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 4, 2022 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Microbiome Dysfunction in Surgical Intensive Care Unit Survivors

NCT05357170
View directory record Official record
Conditions
Sepsis, Trauma Injury
Interventions
Human feces collection
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 110 Years
Enrollment
468 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational

Fecal Microbiota Transplantation (FMT) in Clostridium Difficile Infection (CDI) Not Responding to Antibiotics

NCT03117582
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Stool specimen
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
1 Year to 99 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 28, 2022 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational

A Pilot Study of Influenza Viruses Isolated From Immunocompromised Children and Adolescents

NCT02352389
View directory record Official record
Conditions
Influenza, Human
Interventions
Blood sample, Nasal swab, Oropharyngeal swab, Stool sample, Symptom checklist
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 21 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational

The Role of the Pregnane X Receptor (PXR) in Indole Signaling and Intestinal Permeability in Inflammatory Bowel Disease

NCT04089501
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Stool collection, Biopsy collection
Diagnostic Test
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
Up to 65 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 16, 2019 · Synced Oct 24, 2026, 7:34 AM EDT
Active, not recruiting No phase listed Observational

Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine Therapy

NCT03281902
View directory record Official record
Conditions
Advanced Breast Carcinoma, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma, Stage III Breast Cancer AJCC v7, Stage IIIA Breast Cancer AJCC v7, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational

Gut Microbiota in Intestinal Barrier Damage in Acute Leukemia Patients Undergoing Inpatient Induction

NCT03316456
View directory record Official record
Conditions
Chemotherapy-Induced Gut Barrier Damage, Acute Leukemia
Interventions
Observational: Stool Sample Collection, Observational: Blood Sample Collection, Observational: Urine Sample Collection
Diagnostic Test
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years to 99 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 6, 2019 · Synced Oct 24, 2026, 7:34 AM EDT
Terminated No phase listed Observational

Characterization Of the Intestinal Microbiome Evolution After Kidney Transplant Donation or Receipt

NCT03043339
View directory record Official record
Conditions
Renal Transplant
Interventions
Stool Specimen Collection, Anal Swab Sampling, Short Diet Assessment (SDA), NHANES Dietary Screener Questionnaire (DSQ)
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 26, 2024 · Synced Oct 24, 2026, 7:34 AM EDT
Active, not recruiting Phase 2 Interventional

Testing the Combination of Two Anticancer Drugs M1774 (Tuvusertib) and Avelumab to Evaluate Their Safety and Effectiveness in Treating Merkel Cell Skin Cancer, MATRiX Trial

NCT05947500
View directory record Official record
Conditions
Clinical Stage III Cutaneous Merkel Cell Carcinoma AJCC v8, Clinical Stage IV Cutaneous Merkel Cell Carcinoma AJCC v8, Locally Advanced Merkel Cell Carcinoma, Metastatic Merkel Cell Carcinoma, Refractory Merkel Cell Carcinoma, Unresectable Merkel Cell Carcinoma
Interventions
Avelumab, Biopsy Procedure, Biospecimen Collection, Computed Tomography, Magnetic Resonance Imaging, Positron Emission Tomography, Tuvusertib
Drug · Procedure
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
50
States / cities
Irvine, California • La Jolla, California • Los Angeles, California + 39 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting Not applicable Interventional

Molecular Detection of Advanced Neoplasia in Pancreatic Cysts

NCT03855800
View directory record Official record
Conditions
Pancreas Cyst
Interventions
Blood, stool, pancreatic juice and cyst fluid collection, Pancreatic Surgery, Endoscopy Exam
Diagnostic Test · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 120 Years
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting Phase 1 Interventional

PSCA-Targeting CAR-T Cells Plus or Minus Radiation for the Treatment of Patients With PSCA+ Metastatic Castration-Resistant Prostate Cancer

NCT05805371
View directory record Official record
Conditions
Castration-Resistant Prostate Carcinoma, Metastatic Prostate Carcinoma, Stage IVB Prostate Cancer AJCC v8
Interventions
Autologous Anti-PSCA-CAR-4-1BB/TCRzeta-CD19t-expressing T-lymphocytes, Biopsy, Biospecimen Collection, Bone Scan, Computed Tomography, External Beam Radiation Therapy, Leukapheresis, Lymphodepletion Therapy
Biological · Procedure · Radiation
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older · Male only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Host Immune Response to Clostridium Difficile Infection in Inflammatory Bowel Disease Patients

NCT01813500
View directory record Official record
Conditions
Crohn's Disease, Ulcerative Colitis, Clostridium Difficile, Inflammatory Bowel Disease
Interventions
Blood and stool sample
Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2017 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting No phase listed Observational

Kinetic Analysis of Immune Cells in Blood and Chronic Graft-Versus-Host Disease-Affected Tissues After Allogeneic Hematopoietic Cell Transplantation

NCT07235501
View directory record Official record
Conditions
Graft Versus Host Disease, Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Interventions
Non-Interventional Study
Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
7 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Impact of Dietary Intervention on Inflammation and Microbiome Composition Post-Colonoscopy

NCT06603519
View directory record Official record
Conditions
Colorectal Polyp, Inflammation, Dietary Intervention, Microbiota, Colorectal Neoplasms, Metabolomics
Interventions
Modified Plant-Based Mediterranean Diet
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 24, 2026, 7:34 AM EDT
Recruiting No phase listed Observational

The Role of Brain-Bone Marrow-Gut Interaction Following Major Trauma

NCT06606119
View directory record Official record
Conditions
Trauma Injury, Trauma, Critical Illness, Microbiome, Chronic Anemia, Acute Blood Loss Anemia
Interventions
Data and tissue collection
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 100 Years
Enrollment
275 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 24, 2026, 7:34 AM EDT