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Showing 25–46 of 22 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Syphilis Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Video Tool to Promote Knowledge of Syphilis as Facilitator of HIV Transmission

NCT00553111
View directory record Official record
Conditions
Syphilis
Interventions
educational video
Other
Lead sponsor
Jacobi Medical Center
Other
Eligibility
Male only
Enrollment
168 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
2
States / cities
Manhattan, New York
Source: ClinicalTrials.gov public record
Updated Nov 4, 2007 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Behavioral Science Aspects of Rapid Test Acceptance

NCT01317784
View directory record Official record
Conditions
HIV, Hepatitis C, Hepatitis B, Syphilis
Interventions
Rapid tests for HIV, HCV, HBV, and syphilis, HIV/HCV, HIV/syphilis, HIV only
Device
Lead sponsor
California State University, Long Beach
Other
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Long Beach, California
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Jul 22, 2026, 5:01 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Seek, Test, and Treat Intervention to Reduce Chlamydia Trachomatis Disparities

NCT06428643
View directory record Official record
Conditions
Chlamydia, Gonorrhea, Hiv, Syphilis
Interventions
Chlamydia, gonorrhea, syphilis, and HIV screening
Other
Lead sponsor
Tulane University
Other
Eligibility
15 Years to 26 Years
Enrollment
2,322 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Preventing Congenital Syphilis

NCT02353117
View directory record Official record
Conditions
Congenital Syphilis
Interventions
Congenital Syphilis Intervention Group
Behavioral
Lead sponsor
Tulane University School of Public Health and Tropical Medicine
Other
Eligibility
13 Years and older · Female only
Enrollment
60,386 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Jul 22, 2026, 5:01 AM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Feasibility and Acceptability of Point of Care Rapid Syphilis Testing Among Patients Seeking Family Planning Services in Hawai'i

NCT07358949
View directory record Official record
Conditions
Syphilis Infection
Interventions
Rapid Syphilis Test
Diagnostic Test
Lead sponsor
Queen's Medical Center
Other
Eligibility
14 Years and older · Female only
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Completed No phase listed Observational

NOWDx Test for the Diagnosis of Syphilis

NCT05063344
View directory record Official record
Conditions
Syphilis Infection, Treponema Pallidum Infection
Interventions
Diagnostic Test: NOWDx Syphilis Test
Device
Lead sponsor
NOWDiagnostics, Inc.
Industry
Eligibility
18 Years to 64 Years
Enrollment
1,535 participants
Timeline
2021 – 2023
U.S. locations
6
States / cities
Tempe, Arizona • Los Angeles, California • North Miami, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Lay Health Advisors for Sexually Transmitted Disease Prevention

NCT00207506
View directory record Official record
Conditions
Syphilis, Gonorrhea, Chlamydia Infections, HIV Infections
Interventions
HoMBReS: A lay health advisor approach to STD prevention
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
18 Years and older · Male only
Enrollment
354 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 10, 2012 · Synced Jul 22, 2026, 5:01 AM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Rapid HIV, Hep C, and Syphilis Screening in a Rural Street Medicine Clinic

NCT07317687
View directory record Official record
Conditions
HIV Testing, HEPATITIS C (HCV), Syphilis, Hepatitis B Virus (HBV)
Interventions
Rapid Fingerstick Test, Blood Draw for lab test
Diagnostic Test
Lead sponsor
West Virginia University
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Harpers Ferry, West Virginia
Source: ClinicalTrials.gov public record
Updated Jan 19, 2026 · Synced Jul 22, 2026, 5:01 AM 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 Jun 30, 2025 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Phase 4 Interventional Results available

Phase 4 Comparative Trial of Benzathine Penicillin G for Treatment of Early Syphilis in Subjects With or Without HIV Infection

NCT03637660
View directory record Official record
Conditions
Syphilis
Interventions
Benzathine Penicillin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
249 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
10
States / cities
Birmingham, Alabama • Atlanta, Georgia • Indianapolis, Indiana + 7 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Jul 22, 2026, 5:01 AM EDT
Not yet recruiting Not applicable Interventional

Implementation of an Opt-Out Testing and Rapid Diagnostic Strategy for Syphilis and HIV in Pregnant Patients Presenting to the Emergency Department

NCT07525076
View directory record Official record
Conditions
HIV Infections, Syphilis Infection
Interventions
Chembio HIV/Syphilis rapid Point of Care (POC) test, Laboratory-based HIV and syphilis testing
Diagnostic Test
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
14 Years to 45 Years · Female only
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Recruiting Phase 2 Interventional

Vasodilator and Exercise Study for DMD (VASO-REx)

NCT06290713
View directory record Official record
Conditions
Duchenne Muscular Dystrophy, Duchenne Disease, Muscular Dystrophy, Muscular Dystrophy in Children, Vasodilation, Exercise, DMD
Interventions
Tadalafil, Placebo, Exercise Training
Drug · Other
Lead sponsor
University of Florida
Other
Eligibility
6 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jul 22, 2026, 5:01 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 5, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional

A Pilot Study Evaluating Penicillin G and Ceftriaxone as Therapies for Presumed Neurosyphilis in HIV Seropositive Individuals

NCT00000648
View directory record Official record
Conditions
HIV Infections, Neurosyphilis
Interventions
Penicillin G potassium, Ceftriaxone sodium
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1996
U.S. locations
42
States / cities
Birmingham, Alabama • San Diego, California • San Francisco, California + 23 more
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Syphilis Video Tool to Promote Knowledge and Testing in the ED

NCT00552539
View directory record Official record
Conditions
Syphilis
Interventions
'educational video'
Other
Lead sponsor
Jacobi Medical Center
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 1, 2007 · Synced Jul 22, 2026, 5:01 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 22, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Active, not recruiting Phase 2 Interventional

Linezolid for Syphilis Pilot Study

NCT05548426
View directory record Official record
Conditions
Syphilis
Interventions
Group B, Linezolid 10d, Group A, Penicillin
Drug
Lead sponsor
University of Southern California
Other
Eligibility
16 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
5
States / cities
Chicago, Illinois • Jackson, Mississippi • Greensboro, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Syph-Check Syphilis Antibody Point of Care (POC) Test

NCT00732355
View directory record Official record
Conditions
Screening for Syphilis Infections
Interventions
Syph-Check POC
Device
Lead sponsor
Healthcare Providers Direct, Inc.
Industry
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 1, 2016 · Synced Jul 22, 2026, 5:01 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Integrated Care Versus Usual Care for Opioid Use Disorder and Infectious Diseases in Veterans

NCT06766331
View directory record Official record
Conditions
Opioid Use Disorder, HIV, Hepatitis C Virus, Gonorrhea, Chlamydia, Syphilis, Sexually Transmitted Infection, Integrated Care, Medications for Opioid Use Disorder
Interventions
Integrated care
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2028 – 2029
U.S. locations
1
States / cities
Northport, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

STI/HIV Intervention Behavioral Intervention Program

NCT04547413
View directory record Official record
Conditions
Sexually Transmitted Infections
Interventions
STI/HIV Intervention Behavioral Intervention Program
Behavioral
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 30 Years
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
2
States / cities
Fayetteville, North Carolina • Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jul 22, 2026, 5:01 AM EDT
Completed Not applicable Interventional Results available

Lumbar Puncture and Syphilis Outcome

NCT02031146
View directory record Official record
Conditions
Syphilis
Interventions
Lumbar puncture
Procedure
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
231 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 24, 2021 · Synced Jul 22, 2026, 5:01 AM 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, 5:01 AM EDT