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ClinicalTrials.gov public records Last synced Oct 25, 2026, 10:39 AM EDT

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Showing 433–456 of 608 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Gram Negative Infection Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Dose Escalating Study of a Prototype CS6 Subunit Vaccine With a Modified Heat-labile Enterotoxin From Enterotoxigenic Escherichia Coli (ETEC)

NCT03404674
View directory record Official record
Conditions
Diarrhea
Interventions
CssBA, dmLT
Biological
Lead sponsor
PATH
Other
Eligibility
18 Years to 45 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 6, 2021 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Immunogenicity of a Candidate Tuberculosis (TB) Vaccine Given to PPD-Negative Adults

NCT00730795
View directory record Official record
Conditions
Tuberculosis (TB)
Interventions
GSK's candidate Mycobacterium tuberculosis vaccine 692342
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 40 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2004
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Aug 8, 2008 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Immunogenicity and Safety Study of GSK Biologicals' Meningococcal Vaccine GSK 134612 Versus Menactra® in Healthy Adolescents/Adults

NCT01165242
View directory record Official record
Conditions
Infections, Meningococcal
Interventions
Meningococcal vaccine GSK 134612, Menactra®
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
10 Years to 25 Years
Enrollment
1,013 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
24
States / cities
Chandler, Arizona • Paramount, California • Sacramento, California + 19 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2018 · Synced Oct 25, 2026, 10:39 AM EDT
Withdrawn Phase 1Phase 2 Interventional

Ceftriaxone for Post-Treatment Lyme Disease

NCT06785402
View directory record Official record
Conditions
Post-Treatment Lyme Disease Syndrome
Interventions
Ceftriaxone treatment, Placebo
Drug
Lead sponsor
Hackensack Meridian Health
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Hackensack, New Jersey
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Oct 25, 2026, 10:39 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Use of a Rapid Test for Gonorrhea & Chlamydia for Women Presenting With Possible Sexually Transmitted Infections

NCT03098394
View directory record Official record
Conditions
Sexually Transmitted Infection, Gonorrhea Female, Chlamydia Females
Interventions
Cepheid Xpert CT/NG Rapid Turnaround Test, Polymerase chain reaction (PCR)
Device
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Oct 25, 2026, 10:39 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Detoxified J5 Core Glycolipid/ Group B Meningococcal Outer Membrane Protein Vaccine for Gram-negative Bacterial Sepsis Administered With and Without Synthetic CPG Oligodeoxynucleotide 7909 Adjuvant

NCT01164514
View directory record Official record
Conditions
Bacterial Sepsis
Interventions
CPG 7909, J5-OMP Vaccine, Placebo
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 31, 2014 · Synced Oct 25, 2026, 10:39 AM 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 27, 2021 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Immunogenicity and Safety of Meningococcal Vaccine GSK134612 vs. Menactra® in Healthy Adolescent/Adults Aged 10-25 Years.

NCT00454909
View directory record Official record
Conditions
Infections, Meningococcal
Interventions
Meningococcal vaccine 134612, Menactra®
Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
10 Years to 25 Years
Enrollment
873 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
10
States / cities
Daly City, California • Fairfield, California • Redwood City, California + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 8, 2018 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Study of DAPTACEL® Administered as a 5th Dose in 4 to 6-Year-Old Children Previously Immunized With PENTACEL™

NCT00802867
View directory record Official record
Conditions
Diphtheria, Tetanus, Pertussis, Polio, Haemophilus Infection
Interventions
Diphtheria and Tetanus Toxoids and Acellular Pertussis (DAPTACEL®)
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
4 Years to 6 Years
Enrollment
989 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2005
U.S. locations
19
States / cities
Jonesboro, Arkansas • Little Rock, Arkansas • Oakland, California + 16 more
Source: ClinicalTrials.gov public record
Updated Apr 14, 2016 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 4 Interventional

Effectiveness of Integrating Prenatal Care in Reducing HIV/STDs Among Young Pregnant Women

NCT00628771
View directory record Official record
Conditions
Pregnancy, HIV Infections, Sexually Transmitted Diseases
Interventions
CenteringPregnancy Plus (CP+), Usual care
Behavioral
Lead sponsor
Yale University
Other
Eligibility
14 Years to 21 Years · Female only
Enrollment
1,233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
3
States / cities
New Haven, Connecticut • Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 3, 2020 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Ending the HIV Epidemic Through Point-of-Care Technologies (EHPOC)

NCT04793750
View directory record Official record
Conditions
HIV Infections, Syphilis
Interventions
Cepheid GeneXpert HIV-1 Qual POC HIV VL test, DPP HIV-Syphilis test system, OraQuick
Diagnostic Test
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
224 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
3
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study on the Safety and Immunogenicity of Boostrix Vaccine in Pregnant Malian Women and Their Infants

NCT03589768
View directory record Official record
Conditions
Clostridium Difficile Immunisation, Diphtheria, Diphtheria Immunisation, Pertussis, Tetanus, Tetanus Immunisation
Interventions
Tetanus and Diphtheria Toxoids Adsorbed, Tetanus toxoid, reduced diphtheria toxoid and acellular pertussis vaccine adsorbed onto aluminum hydroxide
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 39 Years · Female only
Enrollment
399 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 21, 2025 · Synced Oct 25, 2026, 10:39 AM EDT
Recruiting Not applicable Interventional

Offering Routine and Rapid Point of Care (POC) Syphilis Testing in Pregnant Patients Presenting to the Emergency Department

NCT06645106
View directory record Official record
Conditions
Syphilis
Interventions
Rapid Point of Care (POC) Syphilis testing
Device
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Oct 25, 2026, 10:39 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Clinical Validation of the Molecular-Based GenePOC Carba Assay for the Detection and Differentiation of Carbapenemase Genes in Rectal Swab Samples.

NCT03680898
View directory record Official record
Conditions
Carbapenem-Resistant Enterobacteriaceae
Interventions
Rectal swab collection
Device
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
2 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
2
States / cities
Indianapolis, Indiana • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 30, 2021 · Synced Oct 25, 2026, 10:39 AM EDT
Completed No phase listed Observational

Screening for Colonization With Resistant Enterobacterales in Neutropenic Patients With Hematologic Malignancies

NCT04710212
View directory record Official record
Conditions
Hematologic Malignancy, Leukemia, Acute, Neutropenia, Bloodstream Infection
Interventions
No intervention.
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
6
States / cities
San Francisco, California • Nutley, New Jersey • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Pragmatic Trial of Two Strategies for Implementing an Effective eHealth HIV Prevention Program (Keep It Up! 3.0)

NCT03896776
View directory record Official record
Conditions
HIV/AIDS, Gonorrhea, Chlamydia
Interventions
Keep It Up! 3.0
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 34 Years · Male only
Enrollment
2,125 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 7, 2023 · Synced Oct 25, 2026, 10:39 AM EDT
Completed No phase listed Observational

Multinational Study of Acinetobacter Bloodstream Infection: Clinical Outcomes and Global Epidemiology-PITT Protocol

NCT00524290
View directory record Official record
Conditions
Acinetobacter Infections
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Dose-Finding Study of Lyophilized Shigella Sonnei 53G Challenge Strain

NCT02816346
View directory record Official record
Conditions
Healthy
Interventions
Shigella sonnei 53G
Biological
Lead sponsor
PATH
Other
Eligibility
18 Years to 49 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 3, 2019 · Synced Oct 25, 2026, 10:39 AM 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 29, 2021 · Synced Oct 25, 2026, 10:39 AM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Q Fever Vaccine

NCT02092142
View directory record Official record
Conditions
Q Fever
Interventions
Q fever Vaccine
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2019
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 2, 2020 · Synced Oct 25, 2026, 10:39 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Boostrix® Pregnancy Registry

NCT02096276
View directory record Official record
Conditions
Pertussis
Interventions
Data collection
Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
12 Years to 64 Years · Female only
Enrollment
1,517 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Research Triangle Park, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 19, 2020 · Synced Oct 25, 2026, 10:39 AM EDT
Completed No phase listed Observational

Risk Factors for Gastric Disease in Pediatric Helicobacter Pylori (H. Pylori)

NCT00212225
View directory record Official record
Conditions
Helicobacter Infections, Gastritis, Peptic Ulcer
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
6 Months to 18 Years
Enrollment
755 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2007
U.S. locations
3
States / cities
Miami, Florida • Atlanta, Georgia • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 13, 2010 · Synced Oct 25, 2026, 10:39 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Induction of Gut Permeability by an Oral Vaccine

NCT04083950
View directory record Official record
Conditions
Intestinal Permeability, Inflammation, Vaccine, Typhoid Fever
Interventions
Vivotif Typhoid Oral Vaccine, Aspirin (Positive Control)
Biological · Drug
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 49 Years · Female only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Oct 25, 2026, 10:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Human Challenge Model Refinement With Enterotoxigenic Escherichia Coli Strain B7A

NCT02773446
View directory record Official record
Conditions
Healthy Volunteer
Interventions
ETEC strain B7A (O148:H28 CS6+ LT+ST+) (Lot 0481) in Buffer
Biological
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 50 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 6, 2018 · Synced Oct 25, 2026, 10:39 AM EDT