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Showing 1–24 of 26 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Oral Bacteria Clear all
Completed Phase 2 Interventional Accepts healthy volunteers

Clinical Efficacy of Single-Use of Peroxyl Mouthwash for Reducing Bacteria Saliva and Bioaerosol Contamination Phase 2

NCT04717063
View directory record Official record
Conditions
Healthy
Interventions
Peroxyl Oral Product, Placebo
Drug
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jan 19, 2021 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational

Longitudinal Changes in the Oral and Gut Microbiome of Individuals With Alcohol Dependence

NCT02911077
View directory record Official record
Conditions
Alcoholic Intoxication, Alcohol-Related Disorders
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 99 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Probiotic Water on Oral Health in Adults

NCT04473404
View directory record Official record
Conditions
Oral Bacteria, Halitosis
Interventions
Streptococcus salivarius DB-B5 - 2 billion CFU/day, Streptococcus salivarius DB-B5 - 10 billion CFU/day, Placebo
Dietary Supplement · Other
Lead sponsor
Dose Biosystems Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 3, 2020 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational

Effects of Stem Cell Transplantation on Bacteria in the Mouth

NCT00476450
View directory record Official record
Conditions
Allogeneic Peripheral Blood Stem Cell Transplant
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational

Oral Bacteria and Allergic Disease in Children

NCT00438646
View directory record Official record
Conditions
Asthma, Rhinitis, Eczema, Respiratory Sounds, Hypersensitivity
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
6 Years to 11 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 24, 2009 · Synced Jun 26, 2026, 7:55 AM EDT
Terminated Phase 2 Interventional Results available

Nivolumab (Anti-PD1), Tadalafil and Oral Vancomycin in People With Refractory Primary Hepatocellular Carcinoma or Liver Dominant Metastatic Cancer From Colorectal or Pancreatic Cancers

NCT03785210
View directory record Official record
Conditions
Hepatocellular Carcinoma, Hepatocellular Cancer, Metastatic Pancreatic Cancer, Metastatic Colorectal Cancer, Liver Metastasis
Interventions
nivolumab, tadalafil, oral vancomycin
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Bacteria Entering the Blood Stream From Tooth Extractions and Tooth Brushing

NCT00454285
View directory record Official record
Conditions
Bacteremia
Interventions
Effect of Amoxicillin on bacteremia following a single-tooth extraction
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
290 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2006
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 24, 2022 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 2 Interventional Results available

The Effect of Chlorhexidine on the Oral and Lung Microbiota in Chronic Obstructive Pulmonary Disease

NCT02252588
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Chlorhexidine, Placebo
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
40 Years to 85 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 28, 2020 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational

A Description of Bacteria in the Mouths of Patients With Severe Aplastic Anemia

NCT01900119
View directory record Official record
Conditions
Severe Aplastic Anemia (SAA)
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 99 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational

Study of Oral Bacteria in Patients With Dry Mouth

NCT00048685
View directory record Official record
Conditions
Xerostomia, Autoimmune Diseases
Interventions
Not listed
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
Not listed
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 26, 2026, 7:55 AM EDT
Recruiting Phase 2 Interventional

Antibiotic Treatment Effects on Intratumoral Bacteria Modulation in Surgical Patients With Oral Cancer

NCT06627270
View directory record Official record
Conditions
Oral Squamous Cell Carcinoma, Oral Cancer, Head and Neck Cancer, Head and Neck Carcinoma
Interventions
Metronidazole, Chlorhexidine
Drug · Other
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jun 26, 2026, 7:55 AM EDT
Withdrawn Phase 2 Interventional

Vancomycin in Patients With Unresectable Fibrolamellar Hepatocellular Carcinoma (FLC) Oral

NCT04025567
View directory record Official record
Conditions
Metastatic Hepatocellular Carcinoma, Hepatocellular Carcinoma
Interventions
vancomycin
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 15, 2020 · Synced Jun 26, 2026, 7:55 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Oral Bacteria and Immune System Problems Involved in Gum Disease (Periodontitis)

NCT01568697
View directory record Official record
Conditions
Immunosuppression, Periodontal Disease, Healthy Subjects, Healthy Volunteer
Interventions
Not listed
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
7 Years to 100 Years
Enrollment
700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2012
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 3 Interventional Results available

Delafloxacin vs Vancomycin and Aztreonam for the Treatment of Acute Bacterial Skin and Skin Structure Infections

NCT01984684
View directory record Official record
Conditions
Skin and Subcutaneous Tissue Bacterial Infections, Skin Structures and Soft Tissue Infections
Interventions
delafloxacin, vancomycin, aztreonam
Drug
Lead sponsor
Melinta Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
31
States / cities
Mobile, Alabama • Montgomery, Alabama • Anaheim, California + 28 more
Source: ClinicalTrials.gov public record
Updated Nov 16, 2017 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Clinical Investigation to Examine Toothpaste Effect on Oral Bacteria

NCT02194621
View directory record Official record
Conditions
Oral Bacteria Levels in the Mouth
Interventions
Total Flavor option 1, Total Flavor option 2, Placebo toothpaste: Crest Cavity Protection toothpaste
Drug
Lead sponsor
Colgate Palmolive
Industry
Eligibility
22 Years to 58 Years
Enrollment
128 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Newark, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Jun 26, 2026, 7:55 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 Jun 26, 2026, 7:55 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Reducing Risk for Infective Endocarditis

NCT05721781
View directory record Official record
Conditions
Bacteremia, Infective Endocarditis
Interventions
Oral Hygiene instruction, Dental Cleaning
Behavioral · Procedure
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
6
States / cities
Boston, Massachusetts • Ann Arbor, Michigan • Newark, New Jersey + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2025 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Investigate Oral Bacteria in Adult Population

NCT00762177
View directory record Official record
Conditions
Oral Bacteria
Interventions
Fluoride, Fluoride, Triclosan, Stannous Fluoride
Drug
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Newark, New York
Source: ClinicalTrials.gov public record
Updated Mar 22, 2011 · Synced Jun 26, 2026, 7:55 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Effect of an Oral Probiotic Tablet on Oral Bacteria and Clinical Measurements (ProBiora3)

NCT01520974
View directory record Official record
Conditions
Oral Health
Interventions
ProBiora3 mints, Placebo tablet
Other
Lead sponsor
Oragenics, Inc.
Industry
Eligibility
18 Years to 35 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 1, 2012 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Dental Implants and Mouth Rinse

NCT02002442
View directory record Official record
Conditions
Reduction in Bacterial Counts Through the Use of Mouthwash
Interventions
Mouthwash
Other
Lead sponsor
Tufts University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 4, 2018 · Synced Jun 26, 2026, 7:55 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Assess the Effect of Treating Periodontal Disease on Cardiovascular Function in Young Adults

NCT01376791
View directory record Official record
Conditions
Periodontal Disease, Atherosclerosis
Interventions
Not listed
Lead sponsor
San Diego State University
Other
Eligibility
21 Years to 40 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Valley Center, California
Source: ClinicalTrials.gov public record
Updated Apr 22, 2013 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Triclosan Toothpaste and Third Molar Surgery

NCT01292343
View directory record Official record
Conditions
Dry Socket, Wound Infection
Interventions
Colgate Total Toothpaste, Colgate Regular Toothpaste
Other
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 35 Years
Enrollment
141 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Oct 27, 2015 · Synced Jun 26, 2026, 7:55 AM EDT
Completed Phase 4 Interventional

A Peri-intubation Oral Intervention to Reduce Oral Flora and VAP

NCT00248300
View directory record Official record
Conditions
Pneumonia
Interventions
Chlorhexidine
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Jun 26, 2026, 7:55 AM EDT
Active, not recruiting Not applicable Interventional

Efficacy of A Novel RinSe Device to Reduce Oral Bacteria in Intubated IntEnsive CaRe Patients: a Pilot Study

NCT06193512
View directory record Official record
Conditions
Oral Bacterial Infection, Mechanical Ventilation Complication
Interventions
SwishKit + Oral care treatment as usual, Oral care treatment as usual
Device · Procedure
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Jun 26, 2026, 7:55 AM EDT