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ClinicalTrials.gov public records Last synced Oct 21, 2026, 4:51 AM EDT

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Showing 1–24 of 217 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Difficile Clear all
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Study of a Candidate Clostridium Difficile Toxoid Vaccine in Subjects at Risk for C. Difficile Infection

NCT01887912
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
C. difficile Toxoid Vaccine, Placebo: 0.9% normal saline
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
50 Years and older
Enrollment
9,302 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
142
States / cities
Huntsville, Alabama • Mobile, Alabama • Flagstaff, Arizona + 124 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2022 · Synced Oct 21, 2026, 4:51 AM EDT
Terminated Phase 2 Interventional Results available

Safety of FMT: OpenBiome Outcomes and Longitudinal Follow-up (STOOL) for Recurrent Clostridium Difficile Infection

NCT02403622
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Fecal Microbiota Preparation
Drug
Lead sponsor
Microbiome Health Research Institute
Other
Eligibility
18 Years to 75 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
4
States / cities
Naperville, Illinois • Indianapolis, Indiana • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Feb 23, 2021 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study To Investigate A Clostridium Difficile Vaccine In Healthy Adults Aged 50 to 85 Years, Who Will Each Receive 3 Doses Of Vaccine.

NCT02117570
View directory record Official record
Conditions
Clostridium Difficile Associated Disease
Interventions
Clostridium difficile vaccine, Placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
50 Years to 85 Years
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
12
States / cities
DeLand, Florida • Savannah, Georgia • Stockbridge, Georgia + 9 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2017 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 3 Interventional Results available

A Study to Investigate the Safety and Efficacy of Fidaxomicin (Oral Suspension or Tablets) and Vancomycin (Oral Liquid or Capsules) in Pediatric Subjects With Clostridium Difficile-associated Diarrhea (CDAD)

NCT02218372
View directory record Official record
Conditions
Clostridium Difficile-associated Diarrhea (CDAD)
Interventions
Fidaxomicin oral suspension, Fidaxomicin tablets, Vancomycin oral liquid, Vancomycin capsules
Drug
Lead sponsor
Astellas Pharma Europe B.V.
Industry
Eligibility
Up to 17 Years
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
14
States / cities
Orange, California • Chicago, Illinois • Indianapolis, Indiana + 11 more
Source: ClinicalTrials.gov public record
Updated Nov 26, 2024 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 3 Interventional Results available

A Trial to Compare Xifaxan to Vancomycin for the Treatment of Clostridium Difficile-Associated Diarrhea (CDAD)

NCT00269399
View directory record Official record
Conditions
Clostridium Infections, Diarrhea
Interventions
Rifaximin (Xifaxan), Vancomycin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
63
States / cities
Scottsdale, Arizona • Redlands, California • Longmont, Colorado + 54 more
Source: ClinicalTrials.gov public record
Updated Oct 14, 2019 · Synced Oct 21, 2026, 4:51 AM EDT
Withdrawn No phase listed Observational

Evaluation of Fidaxomicin in the Treatment of Clostridium Difficile Infection (CDI)

NCT04070352
View directory record Official record
Conditions
Clostridium Difficile Infection (CDI)
Interventions
Fidaxomicin
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 17, 2024 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Gastric Acid on Colonic Microbiome

NCT01901276
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Omeprazole 40 mg bid
Drug
Lead sponsor
Daniel Freedberg, MD
Other
Eligibility
18 Years and older · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 15, 2024 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Clostridium Difficile Vaccine Efficacy Trial

NCT03090191
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Clostridium difficile vaccine, Placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
50 Years and older
Enrollment
17,535 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
220
States / cities
Athens, Alabama • Huntsville, Alabama • Mobile, Alabama + 145 more
Source: ClinicalTrials.gov public record
Updated Feb 13, 2023 · Synced Oct 21, 2026, 4:51 AM EDT
Recruiting Phase 2 Interventional

Prevention of Recurrent C. Difficile Infection Study With AZD5148 Monoclonal Antibody

NCT07285213
View directory record Official record
Conditions
Clostridioides Difficile Infection
Interventions
AZD5148, Placebo
Drug · Other
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
230 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
43
States / cities
Phoenix, Arizona • Chula Vista, California • Sacramento, California + 39 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 21, 2026, 4:51 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Evaluating UTI Diagnosis in Nursing Homes

NCT04815369
View directory record Official record
Conditions
Urinary Tract Infections
Interventions
Not listed
Lead sponsor
Pathnostics
Industry
Eligibility
65 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated May 28, 2025 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety, Tolerability, and Immunogenicity of a Clostridium Difficile Toxoid Vaccine in Healthy Elderly Volunteers

NCT00214461
View directory record Official record
Conditions
Clostridium Infections
Interventions
Vaccine diluent buffer (Placebo), C. difficile toxoid vaccine (2 µg), C. difficile toxoid vaccine (10 µg), C. difficile toxoid vaccine (50 µg)
Biological
Lead sponsor
Sanofi
Industry
Eligibility
65 Years and older
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
2
States / cities
Orlando, Florida • Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 11, 2012 · Synced Oct 21, 2026, 4:51 AM EDT
Completed No phase listed Observational

REBYOTA™ Prospective Registry

NCT05835219
View directory record Official record
Conditions
Recurrence of Clostridium Difficile Infection
Interventions
REBYOTA™
Drug
Lead sponsor
Ferring Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
42
States / cities
Chandler, Arizona • Chula Vista, California • Murrieta, California + 36 more
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Oct 21, 2026, 4:51 AM EDT
Terminated Phase 1 Interventional

Placebo Controlled Study of Fecal Microbiota Transplant (FMT) for a First or Second Episode of C. Difficile Infection in Adults Using a Frozen Encapsulated Inoculum

NCT02343328
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Fecal Microbiota Transplant, Placebo
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 13, 2017 · Synced Oct 21, 2026, 4:51 AM EDT
Withdrawn Phase 4 Interventional

Prospective Trial of Oral Vancomycin Therapy vs. Placebo for Prevention of CDI

NCT04241744
View directory record Official record
Conditions
CDI
Interventions
Vancomycin 125 MG po BID
Drug
Lead sponsor
Creighton University
Other
Eligibility
65 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 27, 2020 · Synced Oct 21, 2026, 4:51 AM 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 7, 2019 · Synced Oct 21, 2026, 4:51 AM EDT
Completed No phase listed Observational

A Multi-Site Clinical Evaluation of the ARIES Clostridium Difficile Assay in Symptomatic Patients

NCT02497417
View directory record Official record
Conditions
Gastroenteritis, Infectious Colitis
Interventions
Not listed
Lead sponsor
Luminex Corporation
Industry
Eligibility
Not listed
Enrollment
1,021 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
4
States / cities
Tampa, Florida • Indianapolis, Indiana • Albuquerque, New Mexico + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 23, 2017 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Phase 2 Interventional

Chlorhexidine Bathing Effect on Clostridium Difficile Rates

NCT02502682
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Sage 2% Chlorhexidine Gluconate Cloth Patient Preoperative Skin Preparation
Drug
Lead sponsor
Jared Brooks
Other
Eligibility
18 Years and older
Enrollment
167 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Geneva, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 11, 2016 · Synced Oct 21, 2026, 4:51 AM EDT
Terminated Phase 4 Interventional

Use Of Oral Fidaxomicin Vs. Oral Vancomycin For Clostridium Difficile Infection In Patients With Spinal Cord Injury

NCT02355938
View directory record Official record
Conditions
Clostridium Difficile, Spinal Cord Injury
Interventions
Fidaxomicin 200 mg, Placebo, Vancomycin
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 13, 2016 · Synced Oct 21, 2026, 4:51 AM EDT
Withdrawn Not applicable Interventional

Treatment of C. Difficile Infection With Fecal Microbiota Transplantation (FMT)

NCT01842347
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Fecal microbiota
Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Months and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 13, 2013 · Synced Oct 21, 2026, 4:51 AM EDT
Active, not recruiting Phase 2 Interventional

Autologous Fecal Microbiota Transplantation (Auto-FMT) for Prophylaxis of Clostridium Difficile Infection in Recipients of Allogeneic Hematopoietic Stem Cell Transplantation

NCT02269150
View directory record Official record
Conditions
Allogeneic Hematopoietic Stem Cell
Interventions
fecal microbiota transplantation (FMT), No fecal microbiota transplantation (FMT), routine management
Biological · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 17, 2025 · Synced Oct 21, 2026, 4:51 AM EDT
Terminated Phase 4 Interventional Results available

Bezlotoxumab as Secondary Prophylaxis for C. Difficile in High-risk Hospitalized Patients Exposed to Antibiotics.

NCT03937999
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Bezlotoxumab
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
60 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 9, 2022 · Synced Oct 21, 2026, 4:51 AM 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 21, 2026, 4:51 AM EDT
Terminated Phase 2Phase 3 Interventional

Whey Protein Concentrate 40% Made of Milk of Immunized Cows to Aid in the Prevention of Relapse of Clostridium Difficile-Diarrhea

NCT00177775
View directory record Official record
Conditions
Positive C-Diff Culture
Interventions
MucoMilk product
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 17, 2008 · Synced Oct 21, 2026, 4:51 AM EDT
Completed Not applicable Interventional

Specific Carbohydrate Diet for Clostridium Difficile

NCT03925636
View directory record Official record
Conditions
Clostridium Difficile Infection, Diet Modification
Interventions
Specific Carbohydrate Diet
Dietary Supplement
Lead sponsor
David Suskind
Other
Eligibility
18 Months to 21 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 11, 2022 · Synced Oct 21, 2026, 4:51 AM EDT