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ClinicalTrials.gov public records Last synced Jun 9, 2026, 11:49 PM EDT

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Showing 1–24 of 114 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Infectious Diarrhea Clear all
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Safety, Immunogenicity and Efficacy Study of Inactivated Whole Cell Shigella Flexneri 2a Vaccine With and Without dmLT in Adults

NCT03038243
View directory record Official record
Conditions
Shigella Sonnei Dysenteries
Interventions
Shigella flexneri 2a whole cell (Sf2aWC) vaccine and double mutant E. coli heat labile toxin (dmLT), Shigella flexneri 2a whole cell (Sf2aWC) vaccine, Placebo
Biological · Other
Lead sponsor
PATH
Other
Eligibility
18 Years to 45 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 19, 2017 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Study to Determine If a New Shigella Vaccine is Safe, Induces Immunity and The Best Dose Among Kenyan Infants

NCT04056117
View directory record Official record
Conditions
Shigellosis
Interventions
Shigella 4V, MenACWY, Rabies, Diphtheria, Tetanus and Pertussis (DTaP), Placebo
Biological
Lead sponsor
LimmaTech Biologics AG
Industry
Eligibility
8 Months to 50 Years
Enrollment
596 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
0
States / cities
Not listed
Source: ClinicalTrials.gov public record
Updated Jul 29, 2024 · Synced Jun 9, 2026, 11:49 PM EDT
Recruiting Phase 2 Interventional

Fecal Microbiota Transplantation for IBS

NCT05776914
View directory record Official record
Conditions
Irritable Bowel Syndrome, Diarrhea
Interventions
Donor Fecal Microbiota Transplantation, Autologous Fecal Microbiota Transplantation
Biological
Lead sponsor
Madhusudan (Madhu) Grover, MBBS
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Jun 9, 2026, 11:49 PM EDT
Terminated Phase 2 Interventional Results available

Alanyl-glutamine Supplementation of Standard Treatment for C. Difficile Infection

NCT02053350
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Alanyl-glutamine
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 6, 2022 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 2 Interventional

Study of a Clostridium Difficile Toxoid Vaccine (ACAM-CDIFF™) in Subjects With Clostridium Difficile Infection

NCT00772343
View directory record Official record
Conditions
Diarrhea, Clostridium Difficile Infection
Interventions
0.9% Normal Saline, Clostridium difficile toxoid vaccine, Clostridium difficile toxoid vaccine with adjuvant
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years to 85 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
5
States / cities
Tampa, Florida • Marietta, Georgia • Worcester, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2013 · Synced Jun 9, 2026, 11:49 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy Study of CVD 1208S, a Live, Attenuated Oral Vaccine to Prevent Shigella Infection: Phase IIa

NCT00866476
View directory record Official record
Conditions
Shigella
Interventions
CVD 1208S, a Shigella flexneri 2a live, oral vaccine, Placebo
Biological · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 2 Interventional

A Study of GT160-246 Versus Vancomycin in Patients With Clostridium Difficile-Associated Diarrhea

NCT00034294
View directory record Official record
Conditions
Clostridium Difficile-Associated Diarrhea, Clostridium Enterocolitis, Clostridium Difficile Diarrhea, Antibiotic-associated Colitis, Antibiotic-associated Diarrhea
Interventions
GT160-246
Drug
Lead sponsor
Genzyme, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
58
States / cities
Mobile, Alabama • Phoenix, Arizona • Tucson, Arizona + 50 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2015 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Efficacy, Safety and Immunogenicity of a Vaccine Designed to Protect Against Infection With Shigella Sonnei in Healthy Adults

NCT03527173
View directory record Official record
Conditions
Dysentery, Bacillary
Interventions
S.sonnei vaccine, Placebo, S. sonnei 53G challenge strain
Biological · Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 50 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 27, 2020 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Not applicable Interventional

A Multicenter Placebo-Controlled Double Blind Study to Evaluate the Efficacy and Safety of Sandostatin ( SMS 201-995 ) in Patients With Acquired Immunodeficiency Related Diarrhea Who Were Either "Responders" or "Non-Responders" in a Prior Placebo-Controlled Double-Blind Sandostatin Study.

NCT00002253
View directory record Official record
Conditions
Diarrhea, HIV Infections
Interventions
Octreotide
Drug
Lead sponsor
Sandoz
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
22
States / cities
Los Angeles, California • San Diego, California • San Francisco, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Trial Evaluating Chemoprophylaxis Against Travelers' Diarrhea - Prevent TD

NCT02498301
View directory record Official record
Conditions
Travelers' Diarrhea, Functional Bowel Disorders, Reactive Arthritis
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years and older
Enrollment
449 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
5
States / cities
San Diego, California • Honolulu, Hawaii • Marine Corps Base Camp Lejeune, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2023 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 2 Interventional Results available

Study of CB-183,315 in Participants With Clostridium Difficile Infection

NCT01085591
View directory record Official record
Conditions
Clostridium Difficile Infection, Diarrhea
Interventions
CB-183,315, Placebo, Vancomycin
Drug
Lead sponsor
Cubist Pharmaceuticals LLC, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
Industry
Eligibility
18 Years and older
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
22
States / cities
Washington D.C., District of Columbia • Saint Cloud, Florida • Decatur, Georgia + 17 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2018 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 1 Interventional

Effect of an Anti-Inflammatory Drug on Gut Mucosa in HIV Infected Patients

NCT00069498
View directory record Official record
Conditions
HIV Infections
Interventions
5-aminosalicylic acid
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years · Male only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1999
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 24, 2007 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Not applicable Interventional

Azithromycin in the Treatment of Cryptosporidiosis in Patients Who Have Not Had Success With Other Drugs

NCT00002328
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Azithromycin
Drug
Lead sponsor
Pfizer
Industry
Eligibility
1 Day and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Groton, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jun 9, 2026, 11:49 PM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

A Human Challenge Study to Assess Protection of a Shigella Tetravalent Bioconjugate Vaccine

NCT06615375
View directory record Official record
Conditions
Shigellosis
Interventions
Shigella4V2, Placebo
Biological
Lead sponsor
LimmaTech Biologics AG
Industry
Eligibility
18 Years to 50 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
3
States / cities
Atlanta, Georgia • Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 9, 2026, 11:49 PM EDT
Terminated Phase 2 Interventional

Study of Culturelle in the Prophylaxis of Infection and Diarrhea

NCT01605747
View directory record Official record
Conditions
Pediatric Burns
Interventions
Culturelle, Placebo
Dietary Supplement
Lead sponsor
Shriners Hospitals for Children
Other
Eligibility
6 Months to 18 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 12, 2013 · Synced Jun 9, 2026, 11:49 PM EDT
Terminated Phase 2 Interventional Results available

Safety and Efficacy of Niclosamide in Patients With COVID-19 With Gastrointestinal Infection

NCT04858425
View directory record Official record
Conditions
Covid19
Interventions
Niclosamide, Placebo
Drug
Lead sponsor
Entero Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
166 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
13
States / cities
Birmingham, Alabama • DeLand, Florida • Hialeah, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Shigella Flexneri 2a Invaplex 50 Vaccine Dose Finding and Assessment of Protection

NCT00485134
View directory record Official record
Conditions
Shigellosis
Interventions
240 µg Shigella flexneri 2a Invaplex 50 vaccine, 480 µg Shigella flexneri 2a Invaplex 50 vaccine, 690 Shigella flexneri 2a Invaplex 50 vaccine, Shigella challenge strain
Biological · Other
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 45 Years
Enrollment
113 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
2
States / cities
Baltimore, Maryland • Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 10, 2017 · Synced Jun 9, 2026, 11:49 PM EDT
Suspended Phase 3 Interventional

BIO-K+ CL1285 for Prevention of Recurrent Clostridium Difficile Infection

NCT01202630
View directory record Official record
Conditions
Recurrent Clostridium Difficile Infection
Interventions
Lactobacillus acidophilus CL1285® and Lactobacillus casei, Placebo
Dietary Supplement
Lead sponsor
Bio-K Plus International Inc.
Industry
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
New Hyde Park, New York
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Crofelemer on the Gut Microbiome in Healthy Volunteers and in HIV+ Patients With Non-Infectious Diarrhea

NCT04192487
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, Healthy Volunteers, HIV/AIDS, HIV Diarrhea, Human Immunodeficiency Virus
Interventions
Crofelemer delayed-release tablets 125mg
Drug
Lead sponsor
Napo Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
3
States / cities
Tustin, California • Stratford, Connecticut • Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Jun 9, 2026, 11:49 PM EDT
Not listed Not applicable Interventional

A Study to Evaluate the Use of Nitazoxanide to Treat Cryptosporidiosis

NCT00002158
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
3 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 9, 2007 · Synced Jun 9, 2026, 11:49 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Bismuth Subsalicylate's Role in the Prevention of Travelers' Diarrhea

NCT03535272
View directory record Official record
Conditions
Diarrhea Travelers, Antibiotic Resistant Infection
Interventions
Bismuth subsalicylate, Placebo
Drug
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years to 69 Years
Enrollment
482 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Jun 9, 2026, 11:49 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Pilot Study Assessing Intestinal Microbiota Diversification and Changes After Travel to South(East) Asia From the US

NCT03043300
View directory record Official record
Conditions
Dysbiosis
Interventions
Screening Criteria Review, Pre-Travel Questionnaire, Pre-Travel Stool Specimen Collection, Short-Term Post-Travel Questionnaire, Short-Term Post-Travel Stool Specimen Collection, Long-Term Post-Travel Questionnaire, Long-Term Post-Travel Stool Specimen Collection
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 29, 2019 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 3 Interventional

A Double-Blind, Randomized, Placebo-Controlled, Multicenter Study to Assess the Efficacy and Safety of Orally Administered SP-303 for the Treatment of Diarrhea in Acquired Immunodeficiency Syndrome (AIDS) Patients

NCT00002408
View directory record Official record
Conditions
Diarrhea, HIV Infections
Interventions
Crofelemer
Drug
Lead sponsor
Shaman Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
34
States / cities
Scottsdale, Arizona • Los Angeles, California • Palo Alto, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jun 9, 2026, 11:49 PM EDT
Completed Phase 2 Interventional

Probiotics for Clostridium Difficile Infection in Older Adults

NCT01680874
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Jun 9, 2026, 11:49 PM EDT