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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Diarrhea Infectious Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Shigella CVD 31000: Study of Responses With Shigella-ETEC Vaccine Strain CVD 1208S-122

NCT04634513
View directory record Official record
Conditions
Shigella Infection, Enterotoxigenic Escherichia Coli Infection
Interventions
strain CVD 1208S-122, Placebo
Biological · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 49 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 1, 2026 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 3 Interventional Results available

Microbiota Restoration Therapy for Recurrent Clostridium Difficile Infection (PUNCH CD3-OLS)

NCT03931941
View directory record Official record
Conditions
Clostridium Difficile Infection, Infection, Communicable Diseases
Interventions
RBX2660
Drug
Lead sponsor
Rebiotix Inc.
Industry
Eligibility
18 Years and older
Enrollment
793 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
46
States / cities
Phoenix, Arizona • North Little Rock, Arkansas • Oxnard, California + 43 more
Source: ClinicalTrials.gov public record
Updated Aug 6, 2024 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety Study of Inactivated Shigella Whole Cell Vaccine in Adults

NCT01509846
View directory record Official record
Conditions
Shigellosis
Interventions
Vaccine: 2.6±0.8 x 10^8 vp/mL, 1 dose, Vaccine: 2.6±0.8 x 10^9 vp/mL, 3 doses, Vaccine: 2.6±0.8 x 10^10 vp/mL, 3 doses, Vaccine: 2.6±0.8 x 10^11 vp/mL, 3 doses, Placebo: 1-3 doses
Biological
Lead sponsor
PATH
Other
Eligibility
18 Years to 45 Years
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 10, 2021 · Synced Jul 22, 2026, 5:06 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Safety, and Efficacy Study of ShigETEC, a Live, Attenuated, Oral Combination Vaccine to Prevent Shigella and ETEC Disease Delivered to Healthy Adults Ages 18 to 50 Years Old

NCT07049159
View directory record Official record
Conditions
Shigella
Interventions
ShigETEC vaccine, Placebo, Challenge: Shigella flexneri 2457T at a dose of 1.5x10^3 CFU
Biological · Other
Lead sponsor
Eveliqure Biotechnologies GmbH
Industry
Eligibility
18 Years to 50 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 7, 2025 · Synced Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Tolerability of a Bioconjugate Vaccine Against Shigella Flexneri 2a

NCT02388009
View directory record Official record
Conditions
Shigellosis
Interventions
Flexyn2a, Placebo, Flexyn2a plus adjuvant
Biological
Lead sponsor
LimmaTech Biologics AG
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 21, 2015 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 2 Interventional

Probiotics: Prevention of Severe Pneumonia and Endotracheal Colonization Trial (PROSPECT): A Feasibility Clinical Trial

NCT01782755
View directory record Official record
Conditions
Ventilator Associated Pneumonia (VAP), Other Infections, Antibiotic-Associated Diarrhea, C-Difficile, Duration of Mechanical Ventilation, Length of ICU Stay, Length of Hospital Stay, ICU and Hospital Mortality
Interventions
L. rhamnosus GG - Probiotic, Placebo - Microcrystalline Cellulose
Drug · Other
Lead sponsor
McMaster University
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
2
States / cities
Rochester, Minnesota • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 27, 2019 · Synced Jul 22, 2026, 5:06 PM EDT
Not listed No phase listed Observational

Describing Chinese Herbal Medicine Telehealth Care for Symptoms Related to Infectious Diseases Such as COVID-19

NCT04380870
View directory record Official record
Conditions
Coronavirus Infection
Interventions
Chinese Herbal Medicine
Dietary Supplement
Lead sponsor
Center for Integrated Care
Other
Eligibility
18 Years to 114 Years
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 PM EDT
Completed Phase 3 Interventional Results available

Safety and Tolerability of Crofelemer for HIV-Associated Diarrhea

NCT01374490
View directory record Official record
Conditions
HIV Enteropathy, Diarrhea With HIV
Interventions
Crofelemer
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
21
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Bakersfield, California + 16 more
Source: ClinicalTrials.gov public record
Updated Aug 30, 2020 · Synced Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 PM EDT
Completed Not applicable Interventional

A Multicenter Placebo-Controlled Dose Titration Study to Evaluate the Efficacy and Safety of Sandostatin (SMS 201-995) in the Treatment of Patients With Acquired Immunodeficiency Related Diarrhea

NCT00002252
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
23
States / cities
Los Angeles, California • San Diego, California • San Francisco, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety Study of Chimeric Vaccine to Prevent ETEC Diarrhea

NCT01644565
View directory record Official record
Conditions
Escherichia Coli Infection
Interventions
Recombinant fimbrial adhesin dsc14CfaE-sCTA2/LTB5, Recombinant fimbrial adhesin dscCfaE, Modified E. coli heat labile enterotoxin LTR192G
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 45 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 11, 2021 · Synced Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

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

NCT00866242
View directory record Official record
Conditions
Shigella
Interventions
CVD 1208S, Challenge strain of wild-type Shigella flexneri 2a
Biological
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
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Efficacy Study of IM Administered CssBA+dmLT Against Moderate-severe Diarrhea in Human Infection Model With ETEC Strain B7A in Healthy Adults

NCT06692907
View directory record Official record
Conditions
Escherichia Infection
Interventions
B7A (ETEC challenge strain), CssBA, dmLT, Placebo
Other · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 49 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
2
States / cities
Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of Artificial Invaplex (Shigella Flexneri 2a InvaplexAR)

NCT02445963
View directory record Official record
Conditions
Shigellosis, Bacillary Dysentery
Interventions
Shigella flexneri 2a InvaplexAR
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 45 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 11, 2021 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Phase 2b Challenge Study With the Bioconjugate Vaccine Flexyn2a

NCT02646371
View directory record Official record
Conditions
Shigellosis
Interventions
Flexyn2a, Placebo
Biological
Lead sponsor
LimmaTech Biologics AG
Industry
Eligibility
18 Years to 50 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 26, 2021 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 2 Interventional

Efficacy, Safety and Tolerability of Cadazolid in Subjects With Clostridium Difficile Associated Diarrhea (CDAD)

NCT01222702
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Cadazolid, Vancomycin, Placebo-matching cadazolid, Placebo-matching vancomycin
Drug
Lead sponsor
Actelion
Industry
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
11
States / cities
Newark, Delaware • Jacksonville, Florida • Orlando, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2017 · Synced Jul 22, 2026, 5:06 PM EDT
Completed Phase 3 Interventional Results available

Safety and Effectiveness of 3 Doses of Crofelemer Compared to Placebo in the Treatment of HIV Associated Diarrhea

NCT00547898
View directory record Official record
Conditions
HIV Associated Diarrhea
Interventions
Crofelemer 125 mg, Crofelemer 250 mg, Crofelemer 500 mg, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
374 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
79
States / cities
Huntsville, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 53 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2020 · Synced Jul 22, 2026, 5:06 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 Jul 22, 2026, 5:06 PM EDT
Completed Phase 1 Interventional

A Study of Nitazoxanide in the Treatment of AIDS-Related Diarrhea

NCT00002444
View directory record Official record
Conditions
HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
Unimed Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 1996
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 5:06 PM EDT