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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Chlamydia Infection Clear all
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 22, 2026, 9:37 PM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Identigene STD Test Collection Kit Validation Study

NCT01471392
View directory record Official record
Conditions
Infection
Interventions
STD Diagnostic Kit (Identigene)
Device
Lead sponsor
Identigene
Industry
Eligibility
14 Years and older
Enrollment
3,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 2, 2013 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Study of Three Alternatives for Mass Treatment in Trachoma Villages of Tanzania

NCT00347607
View directory record Official record
Conditions
Trachoma
Interventions
community surveillance and re-treatment
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
12 Months to 7 Years
Enrollment
2,700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 27, 2011 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Phase 2 Interventional Results available

YCFM (Youth Correctional Facilities Males)

NCT03249935
View directory record Official record
Conditions
Chlamydial Infection
Interventions
Azithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
12 Years to 21 Years · Male only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 27, 2019 · Synced Jul 22, 2026, 9:37 PM EDT
Terminated Phase 3 Interventional Results available

Empiric Therapy of Mucopurulent Cervicitis (MPC)

NCT01072136
View directory record Official record
Conditions
Vaginitis Bacterial, Cervicitis
Interventions
Placebo, Azithromycin, Cefixime
Other · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older · Female only
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
4
States / cities
Birmingham, Alabama • Torrance, California • New Orleans, Louisiana + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 23, 2014 · Synced Jul 22, 2026, 9:37 PM 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 22, 2026, 9:37 PM EDT
Completed Phase 3 Interventional Results available

Combination Antibiotic Treatment for Reactive Arthritis Caused by Chlamydia Bacteria

NCT00351273
View directory record Official record
Conditions
Arthritis, Reactive, Reiter Disease
Interventions
Doxycycline and Rifampin, Azithromycin and Rifampin, Placebo
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 70 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
2
States / cities
Tampa, Florida • New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 12, 2018 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Using the Healthcare Visit to Improve Contraceptive Use

NCT00140296
View directory record Official record
Conditions
Pregnancy, Chlamydia
Interventions
Contraceptive counseling
Behavioral
Lead sponsor
Centers for Disease Control and Prevention
Federal
Eligibility
16 Years to 44 Years · Female only
Enrollment
747 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 31, 2005 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effect of Intensive Fly Control on Trachoma and Ocular Chlamydia Infection in Tanzania

NCT00347763
View directory record Official record
Conditions
Trachoma
Interventions
10% permethrin in water applied as low volume spray
Procedure
Lead sponsor
Johns Hopkins University
Other
Eligibility
12 Months to 8 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2002
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 14, 2013 · Synced Jul 22, 2026, 9:37 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Improving Maternal and Child Health Through Point-of-care STI Testing

NCT07290439
View directory record Official record
Conditions
Treponema Pallidum Infection, Chlamydia Trachomatis Infection, Neisseria Gonorrheae Infection, Trichomonas Vaginalis Vaginitis, Sexually Transmitted Infection
Interventions
Point-of-care STI tests, Standard of care STI testing
Diagnostic Test
Lead sponsor
Emory University
Other
Eligibility
Female only
Enrollment
756 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Jul 22, 2026, 9:37 PM EDT
Not listed Phase 3 Interventional

PROVIDENCE-1: Study of Rifalazil in Chlamydia Pneumoniae Seropositive Patients

NCT00251849
View directory record Official record
Conditions
Peripheral Vascular Diseases, Intermittent Claudication
Interventions
Rifalazil
Drug
Lead sponsor
ActivBiotics
Industry
Eligibility
40 Years to 80 Years
Enrollment
274 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
23
States / cities
Scottsdale, Arizona • Palo Alto, California • San Diego, California + 20 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2008 · Synced Jul 22, 2026, 9:37 PM 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 22, 2026, 9:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Emergency Department, Rapid Assessment for Sexually Transmitted Infection

NCT02386514
View directory record Official record
Conditions
Infection
Interventions
Not listed
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 3, 2017 · Synced Jul 22, 2026, 9:37 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Azithromycin in Control of Trachoma II

NCT00286026
View directory record Official record
Conditions
Trachoma
Interventions
Azithromycin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
Not listed
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 15, 2012 · Synced Jul 22, 2026, 9:37 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 14, 2022 · Synced Jul 22, 2026, 9:37 PM 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 22, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

NeuMoDx PrEDiCTiNG Study Evaluation Plan

NCT03970850
View directory record Official record
Conditions
Chlamydia Trachomatis Infection, Neisseria Gonorrheae Infection
Interventions
NeuMoDx CT/NG Assay, FDA-cleared NAATs
Diagnostic Test
Lead sponsor
NeuMoDx Molecular, Inc.
Industry
Eligibility
14 Years to 80 Years
Enrollment
4,017 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
15
States / cities
Birmingham, Alabama • North Miami, Florida • Orlando, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2020 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Inflammation in Methamphetamine and STIs (IMSTI)

NCT05162391
View directory record Official record
Conditions
Methamphetamine-dependence, Rectal Gonorrhea, Rectal Chlamydia
Interventions
Contingency Management
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older · Male only
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Jul 22, 2026, 9:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Immunopathogenesis of Chlamydia

NCT00607659
View directory record Official record
Conditions
CHLAMYDIA INFECTIONS
Interventions
No intervention, only observational
Other
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
11 Years to 21 Years · Female only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2016
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Jul 22, 2026, 9:37 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Chlamydia Trachomatis Persistence in the Female Gastrointestinal Tract

NCT00578188
View directory record Official record
Conditions
Chlamydia Infection
Interventions
Not listed
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
11 Years to 19 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 12, 2016 · Synced Jul 22, 2026, 9:37 PM EDT
Completed No phase listed Observational

Etiology of Community Acquired Pneumonia

NCT00471757
View directory record Official record
Conditions
Streptococcus Pneumonia, Haemophilus Influencae, Mycoplasma Pneumonia, Chlamydia Pneumonia
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
200 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 12, 2018 · Synced Jul 22, 2026, 9:37 PM EDT
Completed Not applicable Interventional Results available

Modified Instrumentation for Surgery to Correct Trichiasis

NCT00886015
View directory record Official record
Conditions
Trachoma
Interventions
TT Clamp, Standard BLTR Technique
Device · Procedure
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
1,927 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced Jul 22, 2026, 9:37 PM EDT
Active, not recruiting Phase 4 Interventional

Kebele Elimination of Trachoma for Ocular Health

NCT03335072
View directory record Official record
Conditions
Trachoma
Interventions
Azithromycin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
Not listed
Enrollment
320,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 22, 2025 · Synced Jul 22, 2026, 9:37 PM 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 22, 2026, 9:37 PM EDT