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Showing 1–24 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Parasitic Intestinal Disease Clear all
Completed Phase 1 Interventional

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

NCT00001018
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Letrazuril
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
4
States / cities
Los Angeles, California • New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Terminated No phase listed Observational

Parasitic Infections of the Gastrointestinal Tract

NCT00001162
View directory record Official record
Conditions
Amebiasis, Cryptosporidiosis, Giardiasis, Parasitic Disease, Parasitic Intestinal Disease, Gastrointestinal Helminth Infections
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1977 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 22, 2026, 12:10 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 Jul 22, 2026, 12:10 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Study Testing the Efficacy, Safety, and Tolerability of EDI048 in Cryptosporidium Infection Model in Healthy Adults

NCT07249463
View directory record Official record
Conditions
Cryptosporidiosis
Interventions
Cryptosporidium parvum oocysts (ABO809), EDI048, Placebo
Biological · Drug · Other
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 50 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
2
States / cities
Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Jul 22, 2026, 12:10 PM EDT
Completed No phase listed Observational

Study of Patients With Strongyloides Stercoralis Infection

NCT00001245
View directory record Official record
Conditions
HIV Infection, Nematode Infection, Strongyloidiasis
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
8 Years to 80 Years
Enrollment
650 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1989
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 24, 2009 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 2 Interventional

A Double-Blind, Placebo-Controlled Trial of Paromomycin for Treatment of Cryptosporidiosis in Patients With Advanced HIV Disease and CD4 Counts Under 150 Cells/mm3

NCT00000771
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Paromomycin sulfate
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1996
U.S. locations
14
States / cities
Los Angeles, California • Miami, Florida • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 2 Interventional

A Study of Nitazoxanide in Patients With AIDS and Diarrhea Caused by Cryptosporidium

NCT00001081
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Not applicable Interventional

Protocol For the Treatment of Cryptosporidiosis in AIDS Patients With Diclazuril (R64,433)

NCT00002027
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Diclazuril
Drug
Lead sponsor
Janssen, LP
Industry
Eligibility
12 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Not applicable Interventional

A 28-Day Study of Diclazuril in the Treatment of Cryptosporidiosis in Patients With AIDS

NCT00002278
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Diclazuril
Drug
Lead sponsor
Janssen, LP
Industry
Eligibility
12 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 3 Interventional

A Double-Blind, Placebo-Controlled Trial of Albendazole in HIV-Positive Patients With Intestinal Microsporidiosis

NCT00002191
View directory record Official record
Conditions
Protozoan Infections, HIV Infections
Interventions
Albendazole
Drug
Lead sponsor
SmithKline Beecham
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
6
States / cities
San Francisco, California • Washington D.C., District of Columbia • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Recruiting No phase listed Observational

Evaluation, Treatment and Monitoring of Patients With a Known or Suspected Parasitic Infection

NCT00001645
View directory record Official record
Conditions
Malaria, Intestinal Worms, GI Protozoa, Echiniococcus, Strongyloides
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1998
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Jul 22, 2026, 12:10 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

300 Antibody Diagnostic Test Kit

NCT01646411
View directory record Official record
Conditions
Acute Bacterial Infections, Acute Viral Infections
Interventions
Not listed
Lead sponsor
The Plasma Source
Industry
Eligibility
18 Years to 70 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Southampton, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 19, 2012 · Synced Jul 22, 2026, 12:10 PM EDT
Terminated Phase 3 Interventional

Safety and Effectiveness of Nitazoxanide for the Treatment of Cryptosporidiosis in AIDS Patients

NCT00004986
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Nitazoxanide
Drug
Lead sponsor
Romark Laboratories L.C.
Industry
Eligibility
13 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 4 Interventional

Irritable Bowel Syndrome Evaluation and Treatment in Primary Care

NCT01641341
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Bifidobacterium infantis, Pancrelipase, Nitazoxanide, Placebo
Drug
Lead sponsor
American Academy of Family Physicians
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
9
States / cities
Lomita, California • Leawood, Kansas • Baton Rouge, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Not applicable Interventional

The Effectiveness of Cow's Milk Immune Globulin in the Treatment of AIDS-Related Diarrhea

NCT00002264
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Cryptosporidium Immune Whey Protein Concentrate (Bovine)
Drug
Lead sponsor
Stolle Milk Biologic International
Industry
Eligibility
12 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 1 Interventional

A Study of Spiramycin in the Treatment of Patients With AIDS-Related Diarrhea

NCT00000980
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Spiramycin
Drug
Lead sponsor
Rhone-Poulenc Rorer
Industry
Eligibility
13 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
7
States / cities
San Diego, California • Baltimore, Maryland • Worcester, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of a Human Hookworm Candidate Vaccine With Different Doses of a Novel Adjuvant

NCT01385189
View directory record Official record
Conditions
Hookworm Infection, Hookworm Disease
Interventions
10 μg Na-GST-1/Alhydrogel, 30 μg Na-GST-1/Alhydrogel, 100 μg Na-GST-1/Alhydrogel, 10 μg Na-GST-1/Alhydrogel/GLA-AF (1 μg), 30 μg Na-GST-1/Alhydrogel/GLA-AF (1 μg), 30 μg Na-GST-1/Alhydrogel/GLA-AF (5 μg), 100 μg Na-GST-1/Alhydrogel/GLA-AF (5 μg)
Biological
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jan 5, 2025 · Synced Jul 22, 2026, 12:10 PM EDT
Terminated Not applicable Interventional

Treatment of Chronic Cryptosporidiosis in AIDS Patients

NCT00001128
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Interleukin-12, Paromomycin sulfate, Azithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2005
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 13, 2016 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Not applicable Interventional

Azithromycin in the Treatment of Cryptosporidiosis in Patients With Acquired Immune Deficiency Syndrome (AIDS): A Randomized, Multi-Center, Placebo-Controlled, Double-Blind Study

NCT00002082
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Azithromycin
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
4
States / cities
Oakland, California • San Diego, California • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Not applicable Interventional

Open-Label "Compassionate" Use Study of Spiramycin for the Treatment of Diarrhea Due to Chronic Cryptosporidiosis in Immunocompromised Patients

NCT00002062
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Spiramycin
Drug
Lead sponsor
Rhone-Poulenc Rorer
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Horsham, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 1 Interventional

A Randomized, Multicenter, Double-Blind, Parallel-Group, Placebo-Controlled Trial of the Efficacy and Safety of Bovine Anti-Cryptosporidium Immunoglobulin (BACI) in the Treatment of Cryptosporidium Enteritis in AIDS Patients

NCT00002248
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Cryptosporidium Immune Whey Protein Concentrate (Bovine)
Drug
Lead sponsor
Univax Biologics Inc
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
6
States / cities
Los Angeles, California • San Francisco, California • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 12:10 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase I Study of the Safety, Reactogenicity, and Immunogenicity of Sm-TSP-2/Alhydrogel® With or Without GLA-AF for Intestinal Schistosomiasis in Healthy Adults

NCT02337855
View directory record Official record
Conditions
Schistosomiasis
Interventions
Placebo, Sm-TSP-2/Alhydrogel, Sm-TSP-2/Alhydrogel/GLA-AF
Other · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 25, 2017 · Synced Jul 22, 2026, 12:10 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 Jul 22, 2026, 12:10 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study of Efficacy and Safety of ABO809 in Healthy Participants

NCT05036668
View directory record Official record
Conditions
Cryptosporidium Infection, Cryptosporidiosis
Interventions
Cryptosporidium parvum oocysts (ABO809)
Biological
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced Jul 22, 2026, 12:10 PM EDT