RECRUITING

A Study of Doxycycline to Treat Chlamydial Infection

Conditions

Chlamydial Infection Chlamydia Doxycycline Infection intervention Phase 4

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

This is a Phase 4 blinded, randomized, active-controlled, non-inferiority trial. Final evaluable population will include a minimum 596 individuals: 298 women with confirmed urogenital chlamydia (CT) and 298 men with confirmed rectal chlamydia (CT). Approximately 664 participants will be enrolled to achieve a minimum 596 participants who contribute primary outcome data. Randomization will be stratified by study site and sex: 332 women and 332 men. Participants will be randomized 1:1 to a 3-day regimen of doxycycline or a 7-day regimen of doxycycline. The study blind will be maintained by providing 7 days of identical pre-filled blister packs, one with 3 days of active treatment and 4 days of placebo, and the other with 7 days of active treatment. Participants will be asked to return 28 days after randomization (at day 29), at which time they will be re-tested for chlamydia (CT) using a laboratory-based chlamydia (CT) nucleic acid amplification test (NAAT).

Official Title

A Phase 4 Study of a 3-Day vs. 7-Day Regimen of Doxycycline for the Treatment of Chlamydial Infection

Quick Facts

Study Start:2024-01-19

Study Completion:2026-02-28

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:RECRUITING

Study ID

NCT05840159

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:16 Years

Sexes Eligible for Study:ALL

Accepts Healthy Volunteers:No

Standard Ages:CHILD, ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
1. Has untreated urogenital chlamydia (CT) (in women) or rectal CT (in men), diagnosed with a positive nucleic acid amplification test (NAAT) (point-of care or laboratory-based)\* result within 14 days 2. Must be age \>/=16 years (where the IRB permits individuals aged 16-17 years old to consent to research); otherwise age \>/= 18 years 3. Willing and able to understand and provide written informed consent before initiation of any study procedures 4. Willing to complete a 7-day study drug regimen 5. Willing to abstain from condomless anal or vaginal sex during the trial 6. Willing and able to adhere to planned study procedures for all study visits 7. Has valid contact information	1. For women: lower abdominal or pelvic pain or other signs or symptoms consistent with a clinical diagnosis of pelvic inflammatory disease (PID) Per the CDC's 2021 STD Treatment Guidelines or refer to local guidelines. 2. Signs and symptoms that, in the judgement of a qualified clinician, warrant a prolonged course of treatment with doxycycline For example, 21 days of doxycycline for presumed lymphogranuloma venereum infection. 3. Received antimicrobial therapy active against C. trachomatis within 21 days prior to positive chlamydia (CT) test result, or between the positive chlamydia (CT) test result and study enrollment Use of the following antibiotics is exclusionary: doxycycline and related tetra- or glycylcyclines, macrolides (including azithromycin), fluoroquinolones, rifampin, quinupristin-dalfopristin, and linezolid. Note: Amoxicillin, penicillin, ceftriaxone, and other beta-lactam antibiotics are not considered exclusionary for this study. 4. Planning to take antimicrobial therapy active against chlamydia (CT) during the study period (e.g. doxycycline post-exposure prophylaxis, treatment for Mycoplasma genitalium infection, acne, or any other non-STI medical condition). 5. Currently enrolled in or plan to enroll in another study using antimicrobial therapy active against C. trachomatis during the study period 6. Pregnant or lactating, or plan to become pregnant within the study period 7. Known moderate to severe allergy to tetracyclines, excluding tetracycline-induced photosensitivity. 8. Plan to move or travel to another location that would preclude study follow-up appointments in clinic in the next 30 days 9. Use of a medication contraindicated to treatment with doxycycline within 7 days prior to enrollment or during the study period (systemic retinoids, barbiturates, carbamazepine, phenytoin, warfarin) 10. Previous enrollment in this trial 11. Any condition that, in the judgment of the investigator, precludes participation because it could affect participant safety or determination of study endpoints. * Concomitant untreated gonorrhea (rectal, pharyngeal, or urethral) or known exposure to gonorrhea in the time between CT testing and study enrollment. Gonococcus (GC) infection identified during the course of pre-screening or screening will be treated per clinic standard practice and in accordance with local guidelines without concomitant azithromycin or other treatment for Chlamydia trachomatis infection. * Clinical diagnosis of concomitant untreated primary or secondary syphilis or known exposure to syphilis * Urethritis among men * Contraception status * Diagnosis of HIV

Inclusion Criteria

Exclusion Criteria

1. Has untreated urogenital chlamydia (CT) (in women) or rectal CT (in men), diagnosed with a positive nucleic acid amplification test (NAAT) (point-of care or laboratory-based)\* result within 14 days
2. Must be age \>/=16 years (where the IRB permits individuals aged 16-17 years old to consent to research); otherwise age \>/= 18 years
3. Willing and able to understand and provide written informed consent before initiation of any study procedures
4. Willing to complete a 7-day study drug regimen
5. Willing to abstain from condomless anal or vaginal sex during the trial
6. Willing and able to adhere to planned study procedures for all study visits
7. Has valid contact information

1. For women: lower abdominal or pelvic pain or other signs or symptoms consistent with a clinical diagnosis of pelvic inflammatory disease (PID) Per the CDC's 2021 STD Treatment Guidelines or refer to local guidelines.
2. Signs and symptoms that, in the judgement of a qualified clinician, warrant a prolonged course of treatment with doxycycline For example, 21 days of doxycycline for presumed lymphogranuloma venereum infection.
3. Received antimicrobial therapy active against C. trachomatis within 21 days prior to positive chlamydia (CT) test result, or between the positive chlamydia (CT) test result and study enrollment Use of the following antibiotics is exclusionary: doxycycline and related tetra- or glycylcyclines, macrolides (including azithromycin), fluoroquinolones, rifampin, quinupristin-dalfopristin, and linezolid. Note: Amoxicillin, penicillin, ceftriaxone, and other beta-lactam antibiotics are not considered exclusionary for this study.
4. Planning to take antimicrobial therapy active against chlamydia (CT) during the study period (e.g. doxycycline post-exposure prophylaxis, treatment for Mycoplasma genitalium infection, acne, or any other non-STI medical condition).
5. Currently enrolled in or plan to enroll in another study using antimicrobial therapy active against C. trachomatis during the study period
6. Pregnant or lactating, or plan to become pregnant within the study period
7. Known moderate to severe allergy to tetracyclines, excluding tetracycline-induced photosensitivity.
8. Plan to move or travel to another location that would preclude study follow-up appointments in clinic in the next 30 days
9. Use of a medication contraindicated to treatment with doxycycline within 7 days prior to enrollment or during the study period (systemic retinoids, barbiturates, carbamazepine, phenytoin, warfarin)
10. Previous enrollment in this trial
11. Any condition that, in the judgment of the investigator, precludes participation because it could affect participant safety or determination of study endpoints.
* Concomitant untreated gonorrhea (rectal, pharyngeal, or urethral) or known exposure to gonorrhea in the time between CT testing and study enrollment. Gonococcus (GC) infection identified during the course of pre-screening or screening will be treated per clinic standard practice and in accordance with local guidelines without concomitant azithromycin or other treatment for Chlamydia trachomatis infection.
* Clinical diagnosis of concomitant untreated primary or secondary syphilis or known exposure to syphilis
* Urethritis among men
* Contraception status
* Diagnosis of HIV

Contacts and Locations

Study Contact

Julia C. Dombrowski

CONTACT

12067445640

jdombrow@uw.edu

Study Locations (Sites)

University of Alabama at Birmingham School of Medicine - Infectious Disease

Birmingham, Alabama, 35222

United States

Grady Memorial Hospital

Atlanta, Georgia, 30303

United States

Emory University Hospital Midtown - Emory Clinic Infectious Diseases

Atlanta, Georgia, 30308

United States

University of Rochester Medical Center - Vaccine Research Unit

Rochester, New York, 14642-0001

United States

University of Washington - Harborview Medical Center - Center for AIDS and STD

Seattle, Washington, 98104-2433

United States

Collaborators and Investigators

Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2024-01-19

Study Completion Date2026-02-28

Study Record Updates

Study Start Date2024-01-19

Study Completion Date2026-02-28

Terms related to this study

Keywords Provided by Researchers

Chlamydia
Doxycycline
Infection
intervention
Phase 4

Additional Relevant MeSH Terms

Chlamydial Infection