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Showing 1–24 of 203 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Clostridioides Difficile Clear all
Recruiting Phase 1 Interventional

An Open-Label, Pilot Clinical Trial To Test The Safety And Feasibility Of A Suspension of Freeze-dried Microbiota In Patients Undergoing Colon Resection

NCT06692179
View directory record Official record
Conditions
Recurrent Clostridioides Difficile Infection, Colonic Surgery
Interventions
Orally administered preparation of fecal microbiota (MTP-101P)
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Jul 22, 2026, 2:06 PM 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 16, 2008 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Dose-Confirmation, Immunogenicity and Safety Study of the Clostridium Difficile Vaccine Candidate VLA84 in Healthy Adults Aged 50 Years and Older. Phase II Study

NCT02316470
View directory record Official record
Conditions
Clostridium Difficile
Interventions
VLA84, Placebo
Biological
Lead sponsor
Valneva Austria GmbH
Industry
Eligibility
50 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
7
States / cities
Huntsville, Alabama • Chula Vista, California • La Mesa, California + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2017 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Safety, Tolerability and Pharmacokinetics of AZD5148 in Healthy Adults

NCT06469151
View directory record Official record
Conditions
Healthy Participants
Interventions
AZD5148, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 65 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
4
States / cities
Anniston, Alabama • Glendale, California • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Evaluation Of Clostridium Difficile Vaccine Lot Consistency In Healthy Adults 65 To 85 Years Of Age

NCT03579459
View directory record Official record
Conditions
Clostridium Difficile Associated Disease
Interventions
Clostridium difficile vaccine, placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
65 Years to 85 Years
Enrollment
1,317 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
24
States / cities
Mobile, Alabama • Redding, California • Coral Gables, Florida + 20 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2023 · Synced Jul 22, 2026, 2:06 PM EDT
Terminated Phase 1 Interventional

A Study of Safety of PBCLN-003 Following Antibiotic Therapy in Subjects With C.Difficile-associated Diarrhea

NCT03793686
View directory record Official record
Conditions
Clostridium Difficile Diarrhea
Interventions
PBCLN-003, Placebo
Drug
Lead sponsor
Prolacta Bioscience
Industry
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Idaho Falls, Idaho
Source: ClinicalTrials.gov public record
Updated Oct 18, 2020 · Synced Jul 22, 2026, 2:06 PM 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
42
States / cities
Phoenix, Arizona • Chula Vista, California • Sacramento, California + 38 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Not applicable Interventional Results available

Pulsed UV Xenon Disinfection to Prevent Resistant Healthcare Associated Infection

NCT03349268
View directory record Official record
Conditions
Healthcare Associated Infection, Clostridium Difficile Infection, Infection Due to Multidrug Resistant Bacteria
Interventions
Pulsed xenon ultraviolet (PX-UV) Device, Sham Device
Device
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
25,732 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 13, 2022 · Synced Jul 22, 2026, 2:06 PM 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 10, 2016 · Synced Jul 22, 2026, 2:06 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 Jul 22, 2026, 2:06 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Bacillus Velezensis DSM 33864 for Reduction of the Risk of Recurrent Clostridioides Difficile Infections

NCT05606159
View directory record Official record
Conditions
Clostridium Difficile Infection Recurrence
Interventions
Bacillus velezensis DSM 33864, Placebo
Dietary Supplement
Lead sponsor
Novozymes A/S
Industry
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 4 Interventional

Animal-Assisted Visitation Program Chlorhexidine Trial

NCT04171817
View directory record Official record
Conditions
Methicillin-resistant Staphylococcus Aureus, Clostridium Difficile, Pseudomonas Aeruginosa
Interventions
Chlorhexidine
Drug
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
3 Years to 17 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
3
States / cities
Baltimore, Maryland • St Louis, Missouri • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 4 Interventional Results available

TOX NEG Trial: Clostridium Difficile Diagnosis and Treatment

NCT03388268
View directory record Official record
Conditions
Clostridium Difficile Infection, Diarrhea
Interventions
Oral Vancomycin, Placebo, Toxin enzyme immunoassay, Nuceleic acid amplification test
Drug · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 25, 2021 · Synced Jul 22, 2026, 2:06 PM EDT
Withdrawn Phase 4 Interventional

Addition of Lactobacillus to Metronidazole in Treatment of CDAD

NCT00304863
View directory record Official record
Conditions
Enterocolitis, Pseudomembranous Colitis, Antibiotic-associated Colitis
Interventions
Lactobacillus GG
Drug
Lead sponsor
Michael E. DeBakey VA Medical Center
Federal
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2017 · Synced Jul 22, 2026, 2:06 PM EDT
Not yet recruiting Early Phase 1 Interventional

Prevention of Recurrence of Clostridioides Difficile Colitis With Ursodeoxycholic Acid (UCDA) as a Supplement to Standard Therapy

NCT06884748
View directory record Official record
Conditions
Clostridioides Difficile Infection
Interventions
Ursodiol 500 MG
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jul 22, 2026, 2:06 PM 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 12, 2013 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

Microbiota Restoration Therapy for Recurrent Clostridium Difficile-associated Diarrhea

NCT01925417
View directory record Official record
Conditions
Recurrent Clostridium Difficile Infection
Interventions
RBX2660 (microbiota suspension)
Biological
Lead sponsor
Rebiotix Inc.
Industry
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
13
States / cities
Phoenix, Arizona • Denver, Colorado • Jacksonville, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 12, 2019 · Synced Jul 22, 2026, 2:06 PM EDT
Terminated Not applicable Interventional Results available

Antibiotic Prophylaxis for Urinary Catheter Removal After Radical Prostatectomy

NCT02247960
View directory record Official record
Conditions
Prostate Cancer, Urinary Tract Infection, Clostridium Difficile
Interventions
Ciprofloxacin
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older · Male only
Enrollment
175 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2017 · Synced Jul 22, 2026, 2:06 PM EDT
Not listed Phase 4 Interventional

Clostridial Infection and Oral Lavage -Improving Treatment Before Illness Becomes Severe

NCT01630096
View directory record Official record
Conditions
Clostridium Difficile Colitis
Interventions
Nu-Lytely
Drug
Lead sponsor
Ascension Health
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2012
U.S. locations
1
States / cities
Grand Blanc, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 16, 2012 · Synced Jul 22, 2026, 2:06 PM EDT
Terminated Not applicable Interventional

To Evaluate the Impact of SBI on C. Difficile in Hospitalized UC Patients

NCT02730325
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Serum-derived bovine immunoglobulin/protein isolate (SBI), Placebo
Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
3
States / cities
Miami, Florida • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 17, 2021 · Synced Jul 22, 2026, 2:06 PM EDT
Terminated Phase 4 Interventional Results available

Optimal Treatment for Recurrent Clostridium Difficile

NCT02667418
View directory record Official record
Conditions
Clostridium, Difficile, Fidaxomicin, Vancomycin
Interventions
Fidaxomicin, Vancomycin with Taper/Pulse, Vancomycin
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
308 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2024
U.S. locations
32
States / cities
Phoenix, Arizona • Tucson, Arizona • Little Rock, Arkansas + 28 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jul 22, 2026, 2:06 PM EDT
Completed No phase listed Observational

Vancomycin vs. Nitazoxanide to Treat Recurrent C. Difficile Colitis

NCT00304889
View directory record Official record
Conditions
Clostridium Enterocolitis, Pseudomembranous Colitis, Antibiotic-Associated Colitis
Interventions
Not listed
Lead sponsor
Michael E. DeBakey VA Medical Center
Federal
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Jul 22, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

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

NCT02052726
View directory record Official record
Conditions
Clostridium Difficile
Interventions
C. difficile vaccine with adjuvant, placebo
Biological
Lead sponsor
Pfizer
Industry
Eligibility
50 Years to 85 Years
Enrollment
184 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
6
States / cities
Overland Park, Kansas • Cary, North Carolina • Raleigh, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 3, 2018 · Synced Jul 22, 2026, 2:06 PM EDT
Recruiting Not applicable Interventional

Pre-emptive Prevention for Patients at High Risk for Hospital-onset Clostridioides Difficile

NCT05389904
View directory record Official record
Conditions
C. Difficile
Interventions
Arm 1: Routine care, Arm 2: Preemptive C. difficile infection prevention bundle
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Jul 22, 2026, 2:06 PM EDT