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ClinicalTrials.gov public records Last synced Oct 19, 2026, 1:40 PM EDT

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Showing 193–216 of 310 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool collection Clear all
Terminated Phase 2 Interventional

Investigational Microbiota Restoration Therapeutic for Hepatic Encephalopathy

NCT04155099
View directory record Official record
Conditions
Hepatic Encephalopathy, Cirrhosis, Liver
Interventions
RBX7455, Placebo
Biological
Lead sponsor
Ochsner Health System
Other
Eligibility
18 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Jefferson, Louisiana
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Blood Collection Sub-Study of Exact Sciences Protocol 2019-01: "Clinical Validation of an Optimized Multi-Target Stool DNA (Mt-sDNA 2.0) Test, For Colorectal Cancer Screening BLUE-C"

NCT04144751
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Blood Sample Collection
Other
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years and older
Enrollment
23,494 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
194
States / cities
Birmingham, Alabama • Cullman, Alabama • Dothan, Alabama + 160 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Study of Human Brain-Gut Axis and Gut Microbiome in Patients With Brain Lesions - Repository for Neuroscience Research

NCT06117930
View directory record Official record
Conditions
Malignant Central Nervous System Neoplasm
Interventions
Non-Interventional Study
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

PyloPlus Urea Breath Test System Pediatric Safety and Efficacy Study

NCT05276557
View directory record Official record
Conditions
Helicobacter Pylori, Safety, Efficacy
Interventions
PyloPlus Urea Breath Test System, Stool Antigen Test
Combination Product · Diagnostic Test
Lead sponsor
ARJ Medical, Inc.
Industry
Eligibility
3 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
3
States / cities
Doral, Florida • Orlando, Florida • El Paso, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 1 Interventional

Fecal Microbiota Transplant and Dietary Fiber Supplementation for the Treatment of Gut Graft Versus Host Disease

NCT05067595
View directory record Official record
Conditions
Intestinal Graft Versus Host Disease
Interventions
Colonoscopy, Fecal Microbiota Transplantation, Nutritional Supplementation, Survey Administration, Biospecimen Collection
Procedure · Biological · Dietary Supplement + 1 more
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Project humAn dieTary daTa rEtuRN

NCT06266689
View directory record Official record
Conditions
Diet Habit
Interventions
Personalized Diet Information
Behavioral
Lead sponsor
Duke University
Other
Eligibility
Up to 12 Months
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Not applicable Interventional

Gut Microbiome and Sex as Risk Factors for Kidney Stones After Bariatric Surgery

NCT04590690
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Special diet
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 130 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Association Between Gut Microbiome and Dietary Determinants and Vaccine Response

NCT05239403
View directory record Official record
Conditions
Influenza
Interventions
Biospecimen Collection, Questionnaire Administration
Procedure · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

Clinical Microbial Species & Antibiotic Resistance ID in ED Patients Presenting With Infection - is Rapid ID Possible & Accurate?

NCT01904188
View directory record Official record
Conditions
Sepsis, Systemic Inflammatory Response Syndrome, Infection Mixed, Infection, Bacterial, Infection, Fungal, Infection, Coronavirus, Antibiotic Resistance Genes, Human Genome Analysis
Interventions
Gene Z or other rapid diagnostic techniques developed in our lab (as of 2018 not using Gene Z - now using In-Dx along with other developed techniquesregularly)
Device
Lead sponsor
Michigan State University
Other
Eligibility
18 Years and older
Enrollment
2,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2032
U.S. locations
2
States / cities
Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Terminated No phase listed Observational Results available

Predictors of Tumor Response and of Radiation Therapy Side Effects in Patients With Gastrointestinal Cancers

NCT01445327
View directory record Official record
Conditions
Esophageal Cancer, Stomach Cancer, Pancreatic Cancer
Interventions
Specimen collection
Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 1, 2022 · Synced Oct 19, 2026, 1:40 PM EDT
Active, not recruiting Phase 2 Interventional

PLX038 for Treatment of Metastatic Platinum-resistant Ovarian, Primary Peritoneal, and Fallopian Tube Cancer

NCT05465941
View directory record Official record
Conditions
Platinum-Resistant Fallopian Tube Carcinoma, Platinum-Resistant Ovarian Carcinoma, Platinum-Resistant Primary Peritoneal Carcinoma, Stage IV Fallopian Tube Cancer AJCC v8, Stage IV Ovarian Cancer AJCC v8, Stage IV Primary Peritoneal Cancer AJCC v8
Interventions
Biopsy, Pegylated SN-38 Conjugate PLX038, Computed Tomography, Biospecimen Collection
Procedure · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Not listed No phase listed Observational

Stool Sample Collection Study

NCT06294873
View directory record Official record
Conditions
Colorectal Cancer
Interventions
A screening device for the detection of colorectal and other aerodigestive tract cancers
Diagnostic Test
Lead sponsor
Innovis LLC
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
3
States / cities
Anaheim, California • Ocala, Florida • Cordova, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 6, 2024 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

Microbiome in Head and Neck Squamous Cell Carcinoma

NCT05837221
View directory record Official record
Conditions
Head and Neck Cancer, Lip Cancer, Oral Cancer, Pharynx Cancer
Interventions
Metagenomic sequencing, Metabolic analysis
Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 100 Years
Enrollment
60 participants
Timeline
2025 – 2028
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Not applicable Interventional

Heart Rate Variability and Inflammatory Bowel Disease

NCT06537258
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Biofeedback Enhanced Treatment
Behavioral
Lead sponsor
Emory University
Other
Eligibility
13 Years to 18 Years
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Cytokines and Genes in Therapeutic Response in Crohn's Disease

NCT03266471
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Baseline blood sample, Baseline intestinal biopsies, Crohn's disease activity index (CDAI), Post treatment blood sample, Post treatment intestinal biopsies, Baseline stool sample, Post treatment stool sample
Diagnostic Test · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 14, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Active, not recruiting No phase listed Observational

Strength and Muscle Related Outcomes for Nutrition and Lung Function in CF

NCT05639556
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
BMI and lean mass index from DXA, Anthropometric Measurements, Hand-grip strength, Six-minute walk Test, Sit-to-Stand Test, Short physical performance battery (SPPB), BIA Sub-study, Accelerometry to assess physical activity, Gastrointestinal (GI) and nutrition questionnaires:, Psychosocial questionnaire: PHQ-8, Psychosocial questionnaire: GAD-7, Psychosocial questionnaire: The Treatment Self-Regulation Questionnaire (TSRQ), Psychosocial questionnaire: CF Fatalism Scale, Psychosocial questionnaire: Body Esteem Scale for Adolescents and Adults (BESAA), 12-month Questionnaire, Oral glucose tolerance testing (OGTT), Continuous glucose monitoring (CGM), Chest CT scans (When available within the past 6 months in medical records), Hologic Dual X-Ray Absorptiometry (DXA), Ultrasound Sub-study of assessment of appendage muscles using ultrasound, Psychosocial questionnaire: Hunger Vital Sign questionnaire, Respiratory symptom questionnaire: CRISS, Spirometry, Psychosocial questionnaire: Additional Health Questionnaire, CF Management Questionnaire, Food Frequency Questionnaire
Diagnostic Test · Other · Device
Lead sponsor
Jaeb Center for Health Research
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
23
States / cities
Tucson, Arizona • Little Rock, Arkansas • Atlanta, Georgia + 19 more
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Withdrawn Not applicable Interventional

The Effect of Yogurt in Cancer Patient With Moderate Gastrointestinal (GI) Symptoms

NCT03177681
View directory record Official record
Conditions
Malignant Neoplasms of Independent (Primary) Multiple Sites
Interventions
Tongue Assessment, Stool Sample, Questionnaires, Holter Monitor, Yogurt
Other · Behavioral · Device
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced Oct 19, 2026, 1:40 PM EDT
Terminated No phase listed Observational

Stool Sample Collection Protocol for Development of Screening Test for Colorectal Cancer and Other Digestive Tract Cancers

NCT02503631
View directory record Official record
Conditions
Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Stool Sample Collection Kit
Device
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years to 90 Years
Enrollment
397 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
21
States / cities
Newport Beach, California • Hamden, Connecticut • Holiday, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2018 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting No phase listed Observational

Evaluation of Stool Based Markers for the Early Detection of Colorectal Cancers and Adenomas

NCT00843375
View directory record Official record
Conditions
Colonic Neoplasms
Interventions
Not listed
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
11
States / cities
Los Angeles, California • Urbana, Illinois • Boston, Massachusetts + 8 more
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 19, 2026, 1:40 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Impact of Proton Pump Inhibitors on the Fecal Microbiome

NCT01822977
View directory record Official record
Conditions
Healthy, Clostridium Difficile Infection
Interventions
omeprazole
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 20, 2014 · Synced Oct 19, 2026, 1:40 PM EDT
Completed No phase listed Observational

Fecal Calprotectin Collection Protocol

NCT03143517
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Irritable Bowel Syndrome, Ulcerative Colitis, Crohn Disease, Indeterminate Colitis, Chronic Diarrhea, Celiac Disease, Diverticulitis, Abdominal Pain, Distension, Weight Loss, Food Intolerance, Constipation
Interventions
Stool collection
Diagnostic Test
Lead sponsor
DiaSorin Inc.
Industry
Eligibility
4 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
13
States / cities
Dothan, Alabama • Little Rock, Arkansas • Mission Hills, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 7, 2019 · Synced Oct 19, 2026, 1:40 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Combinatorial Single Cell Strategies for a Crohn's Disease Gut Cell Atlas

NCT04113733
View directory record Official record
Conditions
Crohn Disease
Interventions
Sample Collection
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Oct 19, 2026, 1:40 PM EDT
Recruiting Phase 2 Interventional

Fecal Microbiome Transplant to Remodel Intestinal Microbiota for Patients With Relapsed or Refractory Lymphoma With Exposure to High-Risk Antibiotics Who Are Receiving Chimeric Antigen Receptor T Cells

NCT07042438
View directory record Official record
Conditions
Recurrent Diffuse Large B-Cell Lymphoma, Recurrent High Grade B-Cell Lymphoma With MYC and BCL2 or BCL6 Rearrangements, Recurrent Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma, Refractory Diffuse Large B-Cell Lymphoma, Refractory High Grade B-Cell Lymphoma With MYC and BCL2 or BCL6 Rearrangements, Refractory Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma
Interventions
Axicabtagene Ciloleucel, Biospecimen Collection, Chemotherapy, Fecal Microbiota Transplantation, Leukapheresis, Placebo Administration
Biological · Procedure · Drug
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Oct 19, 2026, 1:40 PM 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 19, 2026, 1:40 PM EDT