Treatment Failure of Chlamydial Infection in Males and Females in Youth Correctional Facilities

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00980148
Recruitment Status : Completed
First Posted : September 18, 2009
Results First Posted : March 18, 2015
Last Update Posted : March 18, 2015
Information provided by (Responsible Party):
National Institute of Allergy and Infectious Diseases (NIAID)

September 17, 2009
September 18, 2009
March 5, 2015
March 18, 2015
March 18, 2015
December 2009
May 2014   (Final data collection date for primary outcome measure)
Assess Microbiological Failure of Recommended Azithromycin and Doxycycline Regimens in Uncomplicated Chlamydia Trachomatis Infection in a Setting Where Repeat Exposure to Chlamydia-infected Persons Can be Minimized. [ Time Frame: Study visit # 2 (Day 28 after therapy started) ]
The proportion of participants with testing by Gen-Probe Aptima Combo 2 that is positive for C. trachomatis and C. trachomatis OmpA (Major Outer Membrane Protein) genotyping reveals the baseline chlamydial strain and the repeat positive chlamydial strain to be the same genotype (i.e., concordant).
Microbiological cure; microbiological failure; unevaluable and indeterminate outcome. [ Time Frame: Study visit # 2 (Day 28 after therapy started) and study visit # 3 (Day 67 after therapy started). ]
Complete list of historical versions of study NCT00980148 on Archive Site
Demographical Characteristics and Clinical Parameters to Predict Treatment Outcome. [ Time Frame: Baseline and study visit #2 (Day 28 after therapy is started) ]
Evaluate whether demographical characteristics and clinical parameters predict treatment outcome. [ Time Frame: Baseline, study visit #2 (Day 28 after therapy is started) and study visit #3 (Day 67 after therapy is started). ]
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Treatment Failure of Chlamydial Infection in Males and Females in Youth Correctional Facilities
Randomized Clinical Trial Evaluating Treatment Failure Following Recommended Therapy (Azithromycin Versus Doxycycline) for Genital Chlamydial Infection in Males and Females in Youth Correctional Facilities
Chlamydia is a common infection among youth and can be given from one person to another during sex. Many people who have chlamydia have no signs of infection at all, but can pass the infection to anyone they have sex with. If not treated, chlamydia can lead to serious health problems. This study will look at how well medicines given for chlamydia infection work. The study requires 306 evaluable subjects, chlamydia-positive, males and non-pregnant females, ages 12-21, living in long-term, gender-segregated youth correctional facilities. Participants will be assigned to receive either doxycycline (2 times per day, by mouth, for 7 days) or azithromycin (1 single dose by mouth). Study procedures will include collection of at least 3 urine samples to test for chlamydia. Study visits will occur during initial enrollment in the study, day 28 after starting treatment, and day 67. Participants will be involved in study related procedures for up to 67 days.
Genital chlamydia is a public health concern. The World Health Organization (WHO) estimates that 90 million of all new cases of sexually transmitted diseases (STDs) per year are caused by Chlamydia (C.) trachomatis. In the United States alone, approximately 3 million new cases of chlamydia are reported yearly, and the costs associated with their management and complications exceed $2 billion. Unfortunately, at least 75 percent of females with chlamydia are asymptomatic, and unless the infection is detected through chlamydia testing (screening), their infection may be transmitted to others or lead to complications. The Centers of Disease Control and Prevention (CDC) recommends either azithromycin 1 gram (gm) by mouth (PO) once or doxycycline 100 milligrams (mg) PO twice daily (BID) for 7 days as co-equal therapies for uncomplicated chlamydia. A secondary aim will be to determine demographic predictors of chlamydia treatment failure following azithromycin or doxycycline treatment, and to explore clinical parameters, which distinguish those with persistent infection. The study design of this Phase III trial will address major limitations of prior chlamydia efficacy studies and the findings will reveal both the true efficacy of azithromycin and doxycycline in uncomplicated chlamydia in adolescents and the factors that predict treatment failure. This study is designed primarily to determine the frequency of chlamydia treatment failure following either azithromycin or doxycycline regimens and to evaluate whether the efficacy of the azithromycin regimen is inferior to the doxycycline regimen. Both drugs are Food and Drug Administration (FDA) approved for use in the U.S. The study will enroll 650 males and females age 12-21 years in good health (based on vital signs and provider's clinical evaluation documented in medical records) who are residing in long-term gender-segregated (not co-ed) youth correctional facilities (YCFs) (usual stay >3 weeks) and who are identified as chlamydia-infected would comprise the study population until 306 evaluable subjects are obtained . Only individuals who have a positive chlamydia screening test are enrolled, and those with negative screening tests are excluded. Consenting chlamydia-positive subjects at the enrollment visit (study visit 1) will be enrolled, asked to provide demographic data, to provide a first-void urine sample (not a mid-stream specimen) for repeat chlamydia testing with Gen-Probe (GP) AC2 (for verification of chlamydia), and then randomized to 1 of 2 treatment arms (190 153 subjects per arm): doxycycline 100 mg PO BID for 7 days or azithromycin 1 gm PO single dose. Both therapies are given as directly observed, and side effects are evaluated at the first follow-up visit (day 28 after study drug initiation). If a subject who's GP AC2 from the enrollment treatment visit returns negative for C. trachomatis, they will be categorized as unevaluable and will be removed from the study, then the site investigator will determine whether the subject will complete this treatment or will receive other therapy. Subjects whose GP AC2 at the enrollment treatment visit is positive for C. trachomatis will then be asked to provide a first-void urine sample for repeat chlamydia testing with GP AC2 at 28- and 67-days after study drug initiation [corresponding to the first follow-up visit (study visit 2) and second follow-up visit (study visit 3), respectively].
Phase 3
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Chlamydial Infection
  • Drug: Azithromycin
    FDA approved, a 1 gm single dose, two 500 mg tablets.
  • Drug: Doxycycline
    FDA approved, a 100 mg capsule twice a day for 7 days.
  • Experimental: Arm2
    Doxycycline 100 mg oral twice a day (BID) for 7 days; 153 subjects
    Intervention: Drug: Doxycycline
  • Experimental: Arm 1
    Azithromycin 1 gm oral single dose; 153 subjects
    Intervention: Drug: Azithromycin
Geisler WM, Uniyal A, Lee JY, Lensing SY, Johnson S, Perry RC, Kadrnka CM, Kerndt PR. Azithromycin versus Doxycycline for Urogenital Chlamydia trachomatis Infection. N Engl J Med. 2015 Dec 24;373(26):2512-21. doi: 10.1056/NEJMoa1502599.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
May 2014
May 2014   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Males and females between the ages of 12 and 21 years
  • Residing in a long-term gender-segregated (no co-ed) youth correctional facility (YCF)
  • Diagnosed with genital chlamydia as determined by a screening C. trachomatis nucleic acid amplification test (NAAT)
  • Anticipated length of stay at the YCF at the time of enrollment is > 3 weeks
  • Willingness to provide written consent
  • Willingness to comply with study procedures

Exclusion Criteria:

  • Diagnosed with gonorrhea as determined by a screening Neisseria gonorrhoeae nucleic acid amplification test (NAAT)
  • Clinical diagnosis of pelvic inflammatory disease (PID) or epididymitis based on review of medical records
  • Known allergy to tetracyclines or macrolides
  • Currently pregnant or breastfeeding
  • History of photosensitivity related to doxycycline use
  • Having received antimicrobial therapy with activity against C. trachomatis within 21 days of the positive chlamydia screening NAAT or in the interval between the positive screening NAAT and study enrollment
  • Any concomitant infection, which requires antimicrobial therapy with activity against C. trachomatis
  • Previously enrolled in this study
  • Unable to swallow pills
  • Other exclusion criteria, per clinician judgment, that prohibits subject from enrolling in study
  • Of note, current use of oral contraceptive agents (OCPs) is not an exclusion criterion
Sexes Eligible for Study: All
12 Years to 21 Years   (Child, Adult)
Contact information is only displayed when the study is recruiting subjects
United States
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National Institute of Allergy and Infectious Diseases (NIAID)
National Institute of Allergy and Infectious Diseases (NIAID)
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National Institute of Allergy and Infectious Diseases (NIAID)
June 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP