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Showing 1–24 of 179 matching trials from the live ClinicalTrials.gov search.
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Active, not recruiting Not applicable Interventional Results available

Early Protein Supplementation in Extremely Preterm Infants Fed Human Milk

NCT04325308
View directory record Official record
Conditions
Prematurity; Extreme, Feeding Disorder Neonatal, Breast Milk Expression, Growth Failure, Microbial Colonization
Interventions
Protein-enriched human milk diet, Usual human milk diet
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 4 Days
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 3, 2026, 4:05 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Assessment of the Ocular Microbiome in Health and Disease

NCT05414994
View directory record Official record
Conditions
Microbial Colonization, Eye Diseases, Ophthalmopathy
Interventions
Eye swab
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 2 Interventional Results available

Decolonization of the Oropharynx, an Important and Neglected Reservoir of S. Aureus Colonization

NCT02589067
View directory record Official record
Conditions
S. Aureus Oropharyngeal Colonization
Interventions
Chlorhexidine gluconate, Saline Placebo
Drug
Lead sponsor
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center
Other
Eligibility
5 Years to 18 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Torrance, California
Source: ClinicalTrials.gov public record
Updated Dec 28, 2020 · Synced Sep 3, 2026, 4:05 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Mechanisms of Impaired HIV-associated B Cell and Pneumococcal Vaccine Responses

NCT02012309
View directory record Official record
Conditions
HIV, Pneumococcal Infections, Pneumococcal Vaccines
Interventions
PCV-13, PPSV-23
Biological
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2021
U.S. locations
3
States / cities
Aurora, Colorado • Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 17, 2020 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Diet on the Gut-Muscle Axis in Older Adults

NCT05549622
View directory record Official record
Conditions
Sarcopenia, Dietary Exposure, Microbial Colonization
Interventions
Low-soluble fiber diet, High-soluble fiber diet
Other
Lead sponsor
Tufts University
Other
Eligibility
65 Years and older
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 17, 2025 · Synced Sep 3, 2026, 4:05 AM EDT
Completed No phase listed Observational

S. Aureus Colonization in Atopic Dermatitis

NCT02091037
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Not listed
Lead sponsor
Columbia University
Other
Eligibility
Up to 18 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 9, 2022 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Early Phase 1 Interventional

Rifaximin for Infection Prophylaxis in Hematopoietic Stem Cell Transplantation

NCT03529825
View directory record Official record
Conditions
Microbial Colonization
Interventions
Rifaximin
Drug
Lead sponsor
Emory University
Other
Eligibility
2 Years to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 11, 2021 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 4 Interventional

Effectiveness of Short-Course Versus Standard Antibiotic Therapy in ICU Patients

NCT00410527
View directory record Official record
Conditions
Bacterial Infections
Interventions
Merrem
Drug
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
12
States / cities
Birmingham, Alabama • Newark, Delaware • Miami, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 3, 2026, 4:05 AM EDT
Recruiting Phase 4 Interventional

Nasal Antisepsis for C. Auris Prevention

NCT06282510
View directory record Official record
Conditions
Candida Auris Infection, Colonization, Asymptomatic
Interventions
Povidone Iodine Topical
Drug
Lead sponsor
Mary K Hayden
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
3
States / cities
Chicago, Illinois • Hinsdale, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Nontypeable H. Influenzae in Healthy Adults

NCT00905385
View directory record Official record
Conditions
Haemophilus Influenzae (NTHI)
Interventions
NTHi Strain 2019
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 54 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Apr 10, 2013 · Synced Sep 3, 2026, 4:05 AM EDT
Recruiting Phase 4 Interventional

Interleukin-4Ra Blockade by Dupilumab Decreases Staphylococcus Colonization and Increases Microbial Diversity in CRSwNP

NCT05094570
View directory record Official record
Conditions
Nasal Polyps, Staphylococcus Aureus
Interventions
Dupilumab Prefilled Syringe
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 31, 2025 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 3 Interventional

Safety and Efficacy of MBI 226 for the Prevention of Central Venous Catheter-Related Bloodstream Infections

NCT00027248
View directory record Official record
Conditions
Sepsis, Bacteremia, Fungemia
Interventions
MBI 226
Drug
Lead sponsor
BioWest Therapeutics Inc
Industry
Eligibility
16 Years and older
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2003
U.S. locations
1
States / cities
Lake Bluff, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 13, 2005 · Synced Sep 3, 2026, 4:05 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Incidence of Methicillin Resistant Staphylococcus Aureus (MRSA) Carriage Rates in Resident Physicians

NCT00929435
View directory record Official record
Conditions
MRSA Colonization
Interventions
Not listed
Lead sponsor
University of Oklahoma
Other
Eligibility
25 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 8, 2012 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Oxalobacter Formigenes Colonization and Urinary Oxalate Excretion

NCT03752684
View directory record Official record
Conditions
Calcium Oxalate Urolithiasis
Interventions
Moderately high oxalate/low calcium diet non-colonized, Oxalobacter formigenes, Moderately high oxalate/low calcium diet colonized
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Retapamulin Ointment in Healthy Adults Nasally Colonized With Staphylococcus Aureus

NCT00539994
View directory record Official record
Conditions
Infections, Bacterial
Interventions
Retapamulin, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
4
States / cities
San Diego, California • Honolulu, Hawaii • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 14, 2016 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Early Phase 1 Interventional

Impact of Clinician-administered Vaginal Live Biotherapeutic Product

NCT07305844
View directory record Official record
Conditions
Bacterial Vaginosis
Interventions
LC106
Drug
Lead sponsor
Caroline Mitchell
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Variability in Microbial Response to Dietary Fiber

NCT06023940
View directory record Official record
Conditions
Microbial Colonization
Interventions
High fiber
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
45 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 3, 2026, 4:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Collection of Dental Plaque and Saliva for Studies of Bacterial Colonization of Teeth

NCT00098267
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
3 Months and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 3, 2026, 4:05 AM EDT
Not listed No phase listed Observational

Vancomycin Resistant Enterococci in Patients Awaiting Liver Transplantation at the University of Michigan: Prevalence, Risk Factors, Natural History and Outcome of Colonization

NCT00005667
View directory record Official record
Conditions
Liver Diseases
Interventions
Not listed
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Mupirocin Ointment to Eliminate Nasal Carriage of Staphylococcus Aureus in HIV Infection

NCT00801879
View directory record Official record
Conditions
Staphylococcus Aureus, HIV Infections
Interventions
Mupirocin calcium ointment, 2%, Placebo ointment
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2006
U.S. locations
2
States / cities
New York, New York • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2014 · Synced Sep 3, 2026, 4:05 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Point Prevalence Study of Multidrug-Resistant Organism Carriage by Healthcare Personnel

NCT01952158
View directory record Official record
Conditions
Multidrug Resistance
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 9, 2018 · Synced Sep 3, 2026, 4:05 AM EDT
Completed Not applicable Interventional Results available

Treatment of Staphylococcus Aureus Colonization in Hand Eczema

NCT01591785
View directory record Official record
Conditions
Hand Eczema, Foot Eczema
Interventions
Retapamulin 1% ointment, Placebo
Drug
Lead sponsor
Gary Goldenberg
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 2, 2020 · Synced Sep 3, 2026, 4:05 AM EDT
Terminated Phase 2 Interventional Results available

Rifabutin Based Therapy for the Eradication of Staphylococcus Aureus Colonization in HIV Infected Adults

NCT00869518
View directory record Official record
Conditions
Staphylococcus Aureus, HIV Infections
Interventions
rifabutin plus trimethoprim sulfamethoxazole, placebo plus trimethoprim-sulfamethoxazole
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 13, 2014 · Synced Sep 3, 2026, 4:05 AM EDT
Withdrawn Phase 4 Interventional

Fidaxomicin to Prevent Clostridium Difficile Colonization

NCT01552668
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Fidaxomicin, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 27, 2014 · Synced Sep 3, 2026, 4:05 AM EDT