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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Chlamydia Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Impact of Two Alternative Dosing Strategies for Trachoma Control in Niger

NCT00618449
View directory record Official record
Conditions
Trachoma, Chlamydia Trachomatis
Interventions
Azithromcyin, Azithromycin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
Not listed
Enrollment
1,139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 7, 2012 · Synced Jul 21, 2026, 11:47 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Multi-level Interventions for STD Prevention Among Adolescents

NCT00146406
View directory record Official record
Conditions
Chlamydia
Interventions
Project Connect
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
11 Years to 20 Years
Enrollment
36,502 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 10, 2012 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Phase 2B/3 Double-blinded Placebo-controlled

NCT03107377
View directory record Official record
Conditions
Chlamydia Trachomatis Infection
Interventions
EVO100, Placebo
Drug
Lead sponsor
Evofem Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
860 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
50
States / cities
Mobile, Alabama • Phoenix, Arizona • Tucson, Arizona + 40 more
Source: ClinicalTrials.gov public record
Updated Aug 11, 2020 · Synced Jul 21, 2026, 11:47 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Assessing Acceptability and Feasibiity of STI Self-swab Testing, to be Offered at the Time of Telemed Medication Abortion Provision

NCT06951438
View directory record Official record
Conditions
Sexually Transmitted Disease (STD), Gonorrhea, Chlamydia, Trichomonas Infection
Interventions
Self-swab collection PCR test for chlamydia, gonorrhea, trichomonas
Diagnostic Test
Lead sponsor
Queen's Medical Center
Other
Eligibility
14 Years and older · Female only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Jun 25, 2025 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

HIV and STD Prevention for High-Risk, Inner-City, African American Youth

NCT00353405
View directory record Official record
Conditions
HIV Infections, Sexually Transmitted Diseases
Interventions
Social Skills Training, Mass media, Control
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
14 Years to 17 Years
Enrollment
1,650 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
4
States / cities
Atlanta, Georgia • Syracuse, New York • Providence, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2012 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 3 Interventional Results available

Treatment of Chlamydia Infection Comparing WC2031 Tablets With Vibramycin

NCT01113931
View directory record Official record
Conditions
Urogential Chlamydia Trachomatis Infection
Interventions
Doxycyline Hyclate tablet, Vibramycin (doxycyline hyclate) capsule
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
19 Years to 45 Years
Enrollment
495 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
43
States / cities
Birmingham, Alabama • Foley, Alabama • Tucson, Arizona + 38 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2012 · Synced Jul 21, 2026, 11:47 AM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

Single Arm Trial of Menstrual Cups Among Economically Vulnerable Women to Reduce Bacterial Vaginosis and STIs

NCT05666778
View directory record Official record
Conditions
Bacterial Vaginosis, Vaginal Microbiome, Chlamydia Trachomatis Infection, Neisseria Gonorrheae Infection, Trichomonas Vaginitis
Interventions
Menstrual Cup
Device
Lead sponsor
Rush University Medical Center
Other
Eligibility
15 Years to 35 Years · Female only
Enrollment
408 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 30, 2025 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Risk Assessment of Long-Haul Truck Drivers

NCT00381992
View directory record Official record
Conditions
Gonorrhea, Chlamydia Infections, Hepatitis B, Hepatitis C, Diabetes Mellitus, Hypertension, Obesity, HIV Infections, Hyperlipidemia
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
21 Years and older
Enrollment
294 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 6, 2017 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Self-Obtained Vaginal Swabs for Chlamydia and Gonorrhea Testing

NCT01849653
View directory record Official record
Conditions
Chlamydial Infection, Gonococcal Infection
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
16 Years to 75 Years · Female only
Enrollment
3,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2016 · Synced Jul 21, 2026, 11:47 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 2, 2020 · Synced Jul 21, 2026, 11:47 AM EDT
Recruiting No phase listed Observational

Validation of Chlamydia Diagnostic Codes in TriNetX US EHR Data

NCT07094373
View directory record Official record
Conditions
Chlamydial Infections
Interventions
Not listed
Lead sponsor
Sanofi
Industry
Eligibility
14 Years to 44 Years
Enrollment
533,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational Results available

A Study to Learn About How Trumenba Vaccine Shots Work Against Gonorrhea Infection in Teenagers and Young Adults in the United States.

NCT05873751
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Meningococcal Vaccines
Interventions
Trumenba Vaccine, MenACWY Vaccine
Biological
Lead sponsor
Pfizer
Industry
Eligibility
15 Years to 30 Years
Enrollment
1,307,378 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2025 · Synced Jul 21, 2026, 11:47 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Increased Access to Emergency Contraceptive Pills

NCT00060463
View directory record Official record
Conditions
Pregnancy, Sexually Transmitted Diseases
Interventions
Increased access to emergency contraceptive pills
Behavioral
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
14 Years to 24 Years · Female only
Enrollment
1,490 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
2
States / cities
Reno, Nevada • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Clinical Evaluation of the Click Sexual Health Test for the Detection of Neisseria Gonorrhoeae (NG), Trichomonas Vaginalis (TV), and Chlamydia Trachomatis (CT) in Women

NCT04098900
View directory record Official record
Conditions
Chlamydial Infection, Gonococcal Infection, Trichomoniasis
Interventions
Click Sexual Health Test
Diagnostic Test
Lead sponsor
Visby Medical
Industry
Eligibility
14 Years to 99 Years · Female only
Enrollment
309 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
5
States / cities
Fort Lauderdale, Florida • Saint Paul, Minnesota • St Louis, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2020 · Synced Jul 21, 2026, 11:47 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Improving Clinic Delivery of HIV-related Anal Health Services

NCT07464236
View directory record Official record
Conditions
HIV, Gonorrhea, Chlamydia, Anal Cancer Squamous Cell
Interventions
PEACHES 2.0 Implementation Strategies
Behavioral
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Biloxi, Mississippi
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Antibiotic Resistance and Microbiome in Children Aged 6-59 Months in Nouna, Burkina Faso

NCT03187834
View directory record Official record
Conditions
Child Development
Interventions
Azithromycin, Amoxicillin, Cotrimoxazole, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
6 Months to 59 Months
Enrollment
252 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Jul 21, 2026, 11:47 AM EDT
Recruiting Not applicable Interventional

RESTORE: Comparing Two Approaches to Repeat TT Surgery Performed by Integrated Eye Care Workers (IECWs)

NCT07322302
View directory record Official record
Conditions
Trachoma, Eye Diseases, Trichiasis
Interventions
B-RAP, BLTR
Procedure
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jul 21, 2026, 11:47 AM 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 11, 2024 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Safer Sex Program for Young African-American Men

NCT01439503
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Trichomoniasis, Syphilis, HIV Infections
Interventions
Intervention
Behavioral
Lead sponsor
Richard Crosby
Other
Eligibility
15 Years to 29 Years · Male only
Enrollment
620 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2018
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Feb 20, 2019 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Phase 3 Interventional Results available

Bacterial Vaginosis Home Screening to Prevent STDs

NCT00667368
View directory record Official record
Conditions
Bacterial Vaginosis
Interventions
Metronidazole
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
15 Years to 25 Years · Female only
Enrollment
1,370 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
7
States / cities
Birmingham, Alabama • San Francisco, California • Baltimore, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of the Atlas Genetics io® CTNG System

NCT03071510
View directory record Official record
Conditions
Chlamydia Trachomatis, Gonorrhea
Interventions
Atlas Genetics io® system
Device
Lead sponsor
Binx Health Limited
Industry
Eligibility
14 Years and older
Enrollment
7,128 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
10
States / cities
Birmingham, Alabama • Los Angeles, California • Indianapolis, Indiana + 7 more
Source: ClinicalTrials.gov public record
Updated Apr 2, 2020 · Synced Jul 21, 2026, 11:47 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Clinical Evaluation of the APTIMA® Assay for Chlamydia Trachomatis Using the PANTHER™ System

NCT01358799
View directory record Official record
Conditions
Chlamydia Trachomatis
Interventions
APTIMA Assay for Chlamydia trachomatis
Device
Lead sponsor
Gen-Probe, Incorporated
Industry
Eligibility
14 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
7
States / cities
Indianapolis, Indiana • New Orleans, Louisiana • Fall River, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 11, 2013 · Synced Jul 21, 2026, 11:47 AM EDT
Completed No phase listed Observational

Chlamydia Trachomatis Immunology and Vaccinology Study

NCT01150747
View directory record Official record
Conditions
Chlamydia
Interventions
ceftriaxone, Azithromycin
Drug
Lead sponsor
Harold Wiesenfeld
Other
Eligibility
15 Years to 35 Years · Female only
Enrollment
347 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
4
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Jul 21, 2026, 11:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Trial of Home Versus Clinic-Based STD Testing

NCT01654991
View directory record Official record
Conditions
Chlamydia, Gonorrhea
Interventions
Home Screening, Clinic Screening
Behavioral
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 45 Years · Male only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 31, 2013 · Synced Jul 21, 2026, 11:47 AM EDT