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ClinicalTrials.gov public records Last synced Oct 22, 2026, 10:29 PM EDT

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Showing 25–42 of 42 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Symbiotic Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

First-in-human Study of VE303 in Healthy Adult Volunteers

NCT04236778
View directory record Official record
Conditions
Healthy Volunteers
Interventions
VE303, Oral Vancomycin
Drug
Lead sponsor
Vedanta Biosciences, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 27, 2020 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 2 Interventional Results available

VE303 for Treatment of Hepatic Encephalopathy (HE)

NCT04899115
View directory record Official record
Conditions
Cirrhosis, Hepatic Encephalopathy
Interventions
Placebo, VE303, oral vancomycin
Drug
Lead sponsor
Patricia Bloom
Other
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 7, 2025 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Probiotic and Prebiotic Combinations on Premature Infants

NCT00282113
View directory record Official record
Conditions
Premature Infants, Stool Bacterial Composition, Growth
Interventions
ProBioPlus, Culturelle, Placebo
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
Up to 7 Days
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 28, 2010 · Synced Oct 22, 2026, 10:29 PM EDT
Recruiting Phase 1Phase 2 Interventional

Symbiotic-Lung-20: A Study to Learn About the Study Medicine Called PF-08634404 in Combination With Different Anticancer Agents in Advanced Cancers

NCT07227298
View directory record Official record
Conditions
Advanced/Metastatic Non-Small Cell Lung Cancer, Carcinoma, Non-Small Cell Lung, Non-Small Cell Lung Cancer
Interventions
PF-08634404, Sigvotatug Vedotin, PF-08046054/SGN-PDL1V
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
162 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2033
U.S. locations
55
States / cities
Fayetteville, Arkansas • Rogers, Arkansas • Springdale, Arkansas + 29 more
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 22, 2026, 10:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pilot Study of Gut Commensals in Antiphospholipid Syndrome

NCT01787305
View directory record Official record
Conditions
Antiphospholipid Syndrome (APS)
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 1 Interventional

Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel Disease

NCT04828031
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Ulcerative Colitis, Crohn Disease
Interventions
Vitamin D
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Human Immunity Against Staphylococcus Aureus Skin Infection

NCT02262819
View directory record Official record
Conditions
Staphylococcus Aureus Skin Infection
Interventions
S. aureus
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
2 Years to 65 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 30, 2021 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 2 Interventional Results available

Effect of Exeporfinium Chloride (XF-73) Gel on Nasal S.Aureus in Patients at Risk of Post-op Staphylococcal Infection

NCT03915470
View directory record Official record
Conditions
Staphylococcal Infections, Surgical Site Infection
Interventions
XF-73, Placebo
Drug
Lead sponsor
Destiny Pharma Plc
Industry
Eligibility
18 Years to 75 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
7
States / cities
Gainesville, Florida • Pocatello, Idaho • Des Moines, Iowa + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2023 · Synced Oct 22, 2026, 10:29 PM EDT
Terminated Not applicable Interventional Results available

Commensal Oral Microbiota in Head and Neck Cancer

NCT03843554
View directory record Official record
Conditions
Head and Neck Cancer, Oral Mucositis
Interventions
Standard of Care Oral Hygiene, Oral mucosal deterging and dental prophylaxis
Other · Procedure
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 26, 2025 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 1Phase 2 Interventional

Beginning Assessment of Cutaneous Treatment Efficacy of Roseomonas in Atopic Dermatitis

NCT03018275
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Roseomonas mucosa
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years to 99 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 27, 2019 · Synced Oct 22, 2026, 10:29 PM EDT
Terminated Phase 1 Interventional Results available

Targeted Investigation of Microbiome Elimination

NCT05177328
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
S. hominis A 9 Product, Placebo
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Nov 12, 2024 · Synced Oct 22, 2026, 10:29 PM EDT
Recruiting Phase 2 Interventional

Confirmatory Clinical Study in Active Ulcerative Colitis

NCT07296315
View directory record Official record
Conditions
Colitis, Ulcerative
Interventions
Low-dose MH002, High-dose MH002, Placebo
Drug
Lead sponsor
MRM Health NV
Industry
Eligibility
16 Years and older
Enrollment
204 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
6
States / cities
Miami, Florida • Orlando, Florida • Palmetto Bay, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2026 · Synced Oct 22, 2026, 10:29 PM EDT
Completed Phase 1 Interventional

SER-262 Versus Placebo in Adults With Primary Clostridium Difficile Infection to Prevent Recurrence

NCT02830542
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
SER-262, Placebo
Drug
Lead sponsor
Seres Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
22
States / cities
Athens, Alabama • Fountain Valley, California • La Mesa, California + 19 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2023 · Synced Oct 22, 2026, 10:29 PM EDT
Enrolling by invitation Phase 1 Interventional

Defined Fecal Microbiota Transplantation for Clostridium Difficile Diarrhea

NCT01868373
View directory record Official record
Conditions
Active C. Difficile Colitis
Interventions
Microbiota Transplantation (FMT)
Biological
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2036
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Oct 22, 2026, 10:29 PM EDT
Recruiting Phase 2Phase 3 Interventional

Symbiotic-GI-16: A Study to Learn About the Study Medicine Called PF-08634404 in Combination With Chemotherapy in Gastroesophageal Cancer

NCT07392892
View directory record Official record
Conditions
Untreated Advanced or Metastatic Gastric, Gastroesophageal Junction , or Esophageal Adenocarcinoma, Metastatic Gastric Cancer, Gastroesophageal Junction Cancer, Esophageal Adenocarcinoma
Interventions
PF-08634404, Chemotherapy, Nivolumab
Biological · Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
840 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
83
States / cities
Atascadero, California • Burbank, California • Encino, California + 68 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 22, 2026, 10:29 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Symbiotic Use in Post-Bariatric Surgery Patients

NCT06252558
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Symbiotic, Placebo
Dietary Supplement
Lead sponsor
University of North Florida
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 9, 2024 · Synced Oct 22, 2026, 10:29 PM EDT
Recruiting Phase 3 Interventional

VE303 for Prevention of Recurrent Clostridioides Difficile Infection

NCT06237452
View directory record Official record
Conditions
Clostridium Difficile, Clostridium Difficile Infections, Clostridium Difficile Infection Recurrence, Clostridioides Difficile Infection, Clostridioides Difficile Infection Recurrence, CDI, C. Diff Infection, Recurrent Clostridium Difficile Infection, C.Difficile Diarrhea, Diarrhea Infectious
Interventions
VE303, Placebo
Biological
Lead sponsor
Vedanta Biosciences, Inc.
Industry
Eligibility
12 Years and older
Enrollment
852 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
84
States / cities
Huntsville, Alabama • Chandler, Arizona • Phoenix, Arizona + 73 more
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Oct 22, 2026, 10:29 PM EDT
Recruiting Phase 1 Interventional

The Microbiota Augmentation to Reestablish Commensal Organisms (MARCO) Trial

NCT06871111
View directory record Official record
Conditions
Liver Diseases, Liver Failure, Cirrhosis, Liver
Interventions
Commensal Bacteria Strains
Biological
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Oct 22, 2026, 10:29 PM EDT