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ClinicalTrials.gov public records Last synced Sep 2, 2026, 10:17 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Stool Sample Clear all
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 25, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Recruiting No phase listed Observational

Collection of Research Data and Samples From Patients Who Experience Immunotherapy Side Effects

NCT04242095
View directory record Official record
Conditions
Malignancy
Interventions
Biospecimen Collection, Medical Chart Review
Procedure · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
Not listed
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
625
States / cities
Anchorage, Alaska • Fairbanks, Alaska • Kingman, Arizona + 402 more
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Completed Early Phase 1 Interventional

Effects of Probiotics on the Gut Microbiome and Immune System in Operable Stage I-III Breast or Lung Cancer

NCT04857697
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Breast Adenocarcinoma, Stage I Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8
Interventions
Biopsy, Biospecimen Collection, Probiotic, Therapeutic Conventional Surgery
Procedure · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 20, 2023 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Community Colorectal Cancer Awareness, Research, Education & Screening (C-CARES)

NCT03906110
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Community Colorectal Cancer Awareness, Research, Education & Screening (C-CARES) Materials, Contact Message, Personalized One on One Education, Fecal Immunochemical Test (FIT)
Behavioral · Diagnostic Test
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
50 Years to 75 Years
Enrollment
327 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Apr 19, 2023 · Synced Sep 2, 2026, 10:17 PM EDT
Recruiting No phase listed Observational

Natural History Study of Patients With Succinic Semialdehyde Dehydrogenase (SSADH) Deficiency

NCT03758521
View directory record Official record
Conditions
Succinic Semialdehyde Dehydrogenase Deficiency
Interventions
Transcranial magnetic stimulation (TMS), Magnetic resonance imaging (MRI), Electroencephalogram (EEG), Bio-specimen Collection
Device · Procedure
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Not listed
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Completed Not applicable Interventional Results available

Evaluation of the Immune Response to Clostridium Difficile in Adults With Clostridium Difficile Infection (CDI)

NCT01716533
View directory record Official record
Conditions
Infections, Clostridium Difficile
Interventions
Blood sampling, Stool sample collection
Procedure · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
3
States / cities
Little Rock, Arkansas • Boston, Massachusetts • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 6, 2019 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational

Oral Aromatase Inhibitors Modify the Gut Microbiome

NCT05030038
View directory record Official record
Conditions
Breast Cancer
Interventions
Fecal swab collection, Blood samples
Biological
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational

Genetics of Fatty Liver Disease in Children

NCT01966627
View directory record Official record
Conditions
Non Alcoholic Fatty Liver Disease
Interventions
ogtt, genotyping, abdominal and liver magnetic resonance imaging, stool sample, liver biopsy
Other
Lead sponsor
Yale University
Other
Eligibility
7 Years to 18 Years
Enrollment
381 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 7, 2017 · Synced Sep 2, 2026, 10:17 PM 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 8, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Parkinson's Disease Biomarkers in Nerve Cells in the Gut

NCT05347407
View directory record Official record
Conditions
Parkinson Disease
Interventions
Colonoscopy
Procedure
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
45 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational

Close Assessment and Testing for Chronic Graft Versus Host Disease, CATCH Study

NCT04188912
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm
Interventions
Biospecimen Collection, Optical Coherence Tomography, Spirometry, Survey Administration, Digital Photography, Quality-of-Life Assessment, Medical Chart Review
Procedure · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
267 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
7
States / cities
Gainesville, Florida • Tampa, Florida • Bethesda, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pediatric Obesity Observational Prospective Trial

NCT03139877
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
10 Years to 18 Years
Enrollment
295 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 17, 2021 · Synced Sep 2, 2026, 10:17 PM EDT
Not listed No phase listed Observational

Gut Microbiome and Ventricular Arrhythmias

NCT04466072
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Gut Microbiome
Interventions
Stool test for microbial analysis
Diagnostic Test
Lead sponsor
North Florida Foundation for Research and Education
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 17, 2022 · Synced Sep 2, 2026, 10:17 PM 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 25, 2024 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Clinical Validation of An Optimized Multi-Target Stool DNA (Mt-sDNA 2.0) Test, for Colorectal Cancer Screening "BLUE-C"

NCT04144738
View directory record Official record
Conditions
Colorectal Cancer
Interventions
mt-sDNA 2.0 screening test, FIT test, Colonoscopy
Diagnostic Test · Procedure
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years and older
Enrollment
26,758 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
195
States / cities
Birmingham, Alabama • Cullman, Alabama • Dothan, Alabama + 161 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Sep 2, 2026, 10:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Variability in Microbial Response to Dietary Fiber

NCT06023940
View directory record Official record
Conditions
Microbial Colonization
Interventions
High fiber
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
45 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 2, 2026, 10:17 PM EDT
Suspended Not applicable Interventional

Ketogenic Dietary Intervention to Improve Response to Immunotherapy in Patients With Metastatic Melanoma and Metastatic Kidney Cancer

NCT06391099
View directory record Official record
Conditions
Clinical Stage IV Cutaneous Melanoma AJCC v8, Metastatic Cutaneous Melanoma, Metastatic Renal Cell Carcinoma, Stage IV Renal Cell Cancer AJCC v8
Interventions
Best Practice, Biospecimen Collection, Computed Tomography, Dietary Intervention, Educational Activity, Glucose Measurement, Ketone Measurement, Questionnaire Administration
Other · Procedure
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Stomach Cancer Early Detection and Prevention With Endoscopy

NCT05566899
View directory record Official record
Conditions
Gastric Cancer
Interventions
esophagogastroduodenoscopy (EGD)
Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
40 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Sep 2, 2026, 10:17 PM EDT
Withdrawn No phase listed Observational

Diet, Physical Activity and Body Composition Changes During R-CHOP

NCT04293900
View directory record Official record
Conditions
Non-Hodgkin Lymphoma, DLBCL, Diffuse Large B Cell Lymphoma
Interventions
24-hour dietary recall, Hand grip strength, International Physical Activity Questionnaire, Patient-reported outcomes survey, Pittsburgh Sleep Quality Index, Functional Assessment of Cancer Treatment - Lymphoma, urine sample (optional), fecal sample (optional)
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 5, 2020 · Synced Sep 2, 2026, 10:17 PM 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 6, 2026 · Synced Sep 2, 2026, 10:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Reducing Colorectal Cancer Death Through Mailed Outreach Screening

NCT02584998
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Mailed-FIT, Screening invitation-reminder
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
50 Years to 74 Years
Enrollment
782 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 23, 2018 · Synced Sep 2, 2026, 10:17 PM EDT
Completed No phase listed Observational

Effects of Chemotherapy on Intestinal Bacteria in Patients With Newly Diagnosed Breast Cancer

NCT02370277
View directory record Official record
Conditions
Ductal Breast Carcinoma In Situ, Invasive Breast Carcinoma, Stage I Breast Cancer, Stage IIA Breast Cancer, Stage IIB Breast Cancer, Stage IIIA Breast Cancer
Interventions
Cytology Specimen Collection Procedure, Laboratory Biomarker Analysis, Questionnaire Administration
Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 17, 2019 · Synced Sep 2, 2026, 10:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Addressing Colorectal Cancer in South Florida Firefighters

NCT05976282
View directory record Official record
Conditions
Colorectal Cancer, CRC
Interventions
Fecal Immunochemical Test, Septin9 Test
Other
Lead sponsor
University of Miami
Other
Eligibility
40 Years to 65 Years
Enrollment
646 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 3, 2023 · Synced Sep 2, 2026, 10:17 PM EDT
Active, not recruiting No phase listed Observational

Multi-Organ Screening Recommendations in Patients With Lynch Syndrome

NCT00582296
View directory record Official record
Conditions
Lynch Syndrome
Interventions
questionnaires, telephone interview, optional blood drawn, questionnaires, telephone interview and optional blood drawn
Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
1,530 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2026
U.S. locations
8
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 2, 2026, 10:17 PM EDT