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ClinicalTrials.gov public records Last synced Oct 25, 2026, 1:02 PM EDT

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Showing 457–480 of 608 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Gram Negative Infection Clear all
Completed Phase 1 Interventional

Salmonella Typhi Vi O-Acetyl Pectin-rEPA Conjugate Vaccine

NCT00277147
View directory record Official record
Conditions
Typhoid Fever
Interventions
BB IND 6989
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 45 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study to Assess the Safety and Immunogenicity of GSK Meningococcal Group B Vaccine When Administered Concomitantly With GSK Meningococcal MenACWY Conjugate Vaccine in Healthy Subjects of 16-18 Years of Age

NCT04318548
View directory record Official record
Conditions
Infections, Meningococcal
Interventions
Meningococcal Group B Vaccine (GSK3536829A) (rMenB+OMV NZ), Meningococcal MenACWY Conjugate Vaccine (GSK3536820A) (MenA lyo + MenCWY liquid), Placebo
Combination Product · Biological
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
16 Years to 18 Years
Enrollment
945 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
49
States / cities
Phoenix, Arizona • Bell Gardens, California • Los Angeles, California + 35 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2025 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Rates of Pertussis Disease Among Persons Receiving Pentacel® or Other Pertussis Vaccines

NCT01129362
View directory record Official record
Conditions
Pertussis
Interventions
Pentacel® (DTaP-IPV/Hib), Other Pertussis Vaccines
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
Up to 59 Months
Enrollment
1,195 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
2
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 25, 2022 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational

Antibiotic Resistance in Global Pediatric Oncology Centers

NCT03721562
View directory record Official record
Conditions
Antibiotic Resistant Infection
Interventions
Not listed
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 18 Years
Enrollment
560 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
2
States / cities
Memphis, Tennessee • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 3, 2022 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational

Prevalence of Antimicrobial-resistant Pathogens in Patients Admitted for UTIs

NCT03346603
View directory record Official record
Conditions
Urinary Tract Infections, Urosepsis
Interventions
urine culture and susceptibility testing
Other
Lead sponsor
Olive View-UCLA Education & Research Institute
Other
Eligibility
18 Years and older
Enrollment
801 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Sylmar, California
Source: ClinicalTrials.gov public record
Updated Jul 8, 2021 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Evaluate Safety and Immune Response of Novartis Meningococcal ACWY Vaccine In Infants

NCT00474526
View directory record Official record
Conditions
Meningitis, Meningococcal
Interventions
Meningococcal ACWY Conjugate Vaccine, DTaP-IPV-HBV, Hib, Rotavirus, Pneumococcal 7-valent Conjugate Vaccine, HAV, MMR-V, DTaP
Biological
Lead sponsor
Novartis Vaccines
Industry
Eligibility
2 Months to 2 Months
Enrollment
4,545 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
53
States / cities
Bessemer, Alabama • Birmingham, Alabama • Downey, California + 43 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2014 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Keep It Up! 2.0: A Comparison of Two Online HIV Intervention Programs for Young Men Who Have Sex With Men

NCT01836445
View directory record Official record
Conditions
HIV, Gonorrhea, Chlamydia
Interventions
Keep It Up!, HIV Knowledge Control
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 29 Years · Male only
Enrollment
901 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
3
States / cities
Atlanta, Georgia • Chicago, Illinois • New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 15, 2022 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 2 Interventional

Tetracycline Treatment Tolerability Trial

NCT05219929
View directory record Official record
Conditions
Post-Treatment Lyme Disease
Interventions
Tetracycline 500 Mg, Placebo
Drug · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Lutherville, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of Live Oral Cholera Vaccine, PXVX200 in Healthy Older Adults

NCT02100631
View directory record Official record
Conditions
Cholera
Interventions
PXVX0200, Placebo
Biological
Lead sponsor
Bavarian Nordic
Industry
Eligibility
46 Years to 64 Years
Enrollment
398 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
16
States / cities
Mobile, Alabama • DeLand, Florida • Miami, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2023 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Trial of the Immunogenicity, Safety, and Tolerability of rF1V Vaccine With CpG 1018® Adjuvant Compared With rF1V Vaccine in Adults 18 to 55 Years of Age

NCT05506969
View directory record Official record
Conditions
Plague, Pneumonic, Plague, Vaccine-Preventable Diseases
Interventions
rF1V-1018, rF1V vaccine
Biological
Lead sponsor
Dynavax Technologies Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
6
States / cities
Huntsville, Alabama • San Diego, California • Melbourne, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2025 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational

Risk Factors for Quinolone Resistance Among ESBL Producing Klebsiella Species

NCT00518661
View directory record Official record
Conditions
Quinolone Resistance, ESBL, Klebsiella Species, Infection
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Evaluation of Doxycycline Post-exposure Prophylaxis to Reduce Sexually Transmitted Infections in PrEP Users and HIV-infected Men Who Have Sex With Men

NCT03980223
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Syphilis
Interventions
Doxycycline Hyclate Delayed-Release 200 mg
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Male only
Enrollment
641 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
3
States / cities
San Francisco, California • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 12, 2024 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of Combination Therapies for Gonorrhea Treatment

NCT00926796
View directory record Official record
Conditions
Gonorrhoea
Interventions
Azithromycin, Gentamicin, Gemifloxacin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
15 Years to 60 Years
Enrollment
614 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
5
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2015 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Not applicable Interventional Results available

A Study of the Cobas® Liat CT/NG/MG Test Versus Current Standard Practice for Managing Participants at Increased Risk of Sexually Transmitted Infections

NCT06369220
View directory record Official record
Conditions
Chlamydia Trachomatis Infection, Neisseria Gonorrhoeae Infection, Mycoplasma Genitalium Infection
Interventions
cobas® liat CT/NG/MG nucleic acid test, Standard of Care (SOC): Clinician's Standard Practice
Diagnostic Test · Other
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
331 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
4
States / cities
San Francisco, California • Hamilton Square, New Jersey • Perth Amboy, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Not applicable Interventional Results available

Zenyth: Motivational Interviewing-based Telehealth Intervention for Bacterial Sexually Transmitted Infection Screening

NCT06100250
View directory record Official record
Conditions
Sexually Transmitted Diseases, Gonorrhea, Chlamydia, Syphilis, HIV
Interventions
Motivational interviewing and specimen self-collection
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pertussis Vaccine in Healthy Pregnant Women

NCT00707148
View directory record Official record
Conditions
Diphtheria, Pertussis, Tetanus
Interventions
Placebo, Tetanus toxoid, reduced diphtheria toxoid and acellular pertussis vaccine adsorbed
Drug · Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Up to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
4
States / cities
Durham, North Carolina • Houston, Texas • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 25, 2014 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational

A Comparator Study Evaluating Microbiological Resistance and Effects of Alternating Inhaled Antibiotic Therapies

NCT01319253
View directory record Official record
Conditions
Cystic Fibrosis, Pseudomonas Aeruginosa
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
6 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 6, 2015 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Genitourinary and Pharyngeal Pharmacokinetics of Solithromycin

NCT02348424
View directory record Official record
Conditions
Gonorrhoea
Interventions
Solithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 28, 2019 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vanderbilt Pertussis Exposure Study: PEP in Vaccinated Healthcare Workers Following Pertussis Exposure

NCT00469274
View directory record Official record
Conditions
Pertussis
Interventions
Antibiotic PEP
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 64 Years
Enrollment
1,102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 29, 2013 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cepheid Rectal Sample Validation Study

NCT02099760
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Trichomonas
Interventions
STD testing (GC/Ct/trich)
Device
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
402 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 7, 2019 · Synced Oct 25, 2026, 1:02 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Persistence of Protective Antibody Titers 12-24 Months After NmVac4-A/C/Y/W-135-DT Vaccination: Follow Up Study

NCT02500511
View directory record Official record
Conditions
Meningococcal Meningitis, Meningococcal Infections
Interventions
NmVac4-A/C/Y/W-135-DT™
Biological
Lead sponsor
JN-International Medical Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 12, 2016 · Synced Oct 25, 2026, 1:02 PM EDT
Recruiting Not applicable Interventional

Modernizing Perinatal Syphilis Testing

NCT06082453
View directory record Official record
Conditions
Syphilis
Interventions
Quantitative polymerase chain reaction (qPCR) assay for detection of Treponema pallidum, Aptima Treponema pallidum transcription-mediated amplification (TMA) assay for detection of Treponema pallidum, Center for Disease Control (CDC) Sexually Transmitted Infections (STI) 2021 Treatment Guidelines for diagnosis of syphilis
Diagnostic Test · Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
Up to 45 Years
Enrollment
924 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
9
States / cities
Los Angeles, California • Baltimore, Maryland • Columbus, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2025 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Assessing the Safety, Immunogenicity and Dose Response of VLA15, A New Vaccine Candidate Against Lyme Borreliosis

NCT03010228
View directory record Official record
Conditions
Lyme Borreliosis, Nervous System
Interventions
VLA15 with Alum, VLA15 without Alum
Biological
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 39 Years
Enrollment
179 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
4
States / cities
La Mesa, California • Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Oct 25, 2026, 1:02 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Human Challenge Study to Assess Protection of a Shigella Tetravalent Bioconjugate Vaccine

NCT06615375
View directory record Official record
Conditions
Shigellosis
Interventions
Shigella4V2, Placebo
Biological
Lead sponsor
LimmaTech Biologics AG
Industry
Eligibility
18 Years to 50 Years
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
3
States / cities
Atlanta, Georgia • Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 25, 2026, 1:02 PM EDT