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UrethritisPhase 3NCT00358462

Mycoplasma Genitalium Antibiotic Susceptibility and Treatment (MEGA)

A Phase 3 study testing Azithromycin and Doxycycline in people with Urethritis, run by University of Washington at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to find out which of 2 different antibiotics, doxycycline or azithromycin, works best against germs that may cause nongonococcal urethritis. Study participants will include approximately 1200 men, 16 years of age or older, attending a sexually transmitted diseases clinic in Seattle… Read more about this study

Who is it for?
Ages 16 years and older, men only
Conditions the study is for
Urethritis
What is being tested?
Azithromycin and Doxycycline
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
606 participants
Where
1 siteUnited States
Study dates
Jan 2007to Nov 2011
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 16 years and older
  • Men only
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Has a visible urethral discharge or greater than or equal to 5 polymorphonuclear leukocytes (PMNs) per high power field on a Gram-stained slide of a urethral swab sample
  • Possesses and is willing to disclose valid contact information for follow-up
  • English-speaking
  • Gives informed consent
  • Exhibits understanding of study procedures
  • Exhibits ability to comply with study procedures for the entire length of the study

Who cannot join

  • Has previously participated in this study
  • Has taken antibiotics within the prior month
  • Has known allergies to tetracyclines or azithromycin
  • Is being treated with any of the following: warfarin, ergot derivatives, pimozide (Orap), propafenone (Rytmonorm, Rythmol), disopyramide (Norpace, Rythmodan), rifampin, digoxin, isotretinoin, or methotrexate
  • Has received a kidney, heart, or lung transplant.
  • Is undertaking concomitant systemic steroid therapy

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Public Health -- Seattle & King County Sexually Transmitted Diseases Clinic located at Harborview Medical Center

    Seattle, Washington, 98104

Other trials in United States

About this study

Official title: Mycoplasma Genitalium Antibiotic Susceptibility and Treatment: A Randomized Double-blind Trial of the Efficacy of Azithromycin and Doxycycline for Clinical and Microbiological Cure of M. Genitalium in Men With Nongonococcal Urethritis

The purpose of this study is to find out which of 2 different antibiotics, doxycycline or azithromycin, works best against germs that may cause nongonococcal urethritis.

Study participants will include approximately 1200 men, 16 years of age or older, attending a sexually transmitted diseases clinic in Seattle, Washington with clinical signs of urethral inflammation (>=5PMNs/HPF on a Gram-stained slide prepared from urethral exudates and/or a visible urethral discharge upon examination).

Read more

Urine specimens will be collected and tested for Mycoplasma genitalium and Ureaplasmas. Each participant will receive a blinded packet of study medication. Participants will answer an enrollment questionnaire and will also receive a log to complete between visits to record information about treatment adherence, side effects, symptoms, and sexual activity. All subjects will be asked to return for evaluation 3 weeks after the initial clinic visit. Subjects who test positive for M. genitalium and/or Ureaplasmas at the initial clinic visit will also be asked to return for a third study visit, 6 weeks following the initial clinic visit. During follow-up visits, participants will answer a follow-up questionnaire and will be re-evaluated for signs of urethritis. Those who were initially positive for M. genitalium and/or Ureaplasmas will be re-tested for these organisms.

Study participants with signs and/or symptoms of urethritis or who test positive for M. genitalium or Ureaplasmas at the follow-up study visit will receive another blinded treatment packet containing the alternate medication. Those who require additional treatment at the 6-week visit will be asked to return for a fourth follow-up study visit at 9-10 weeks. Study participants who did not test positive for M. genitalium or Ureaplasmas at the initial clinic visit, but who continue to demonstrate signs and/or symptoms of infection at their single follow-up study visit will treated according to clinic standard of care (after the study clinician unblinds their randomly-assigned treatment regimen).

Read the detailed description

OBJECTIVES

The primary objective of this study is to determine the relative effectiveness of azithromycin and doxycycline in eradicating Mycoplasma genitalium and Ureaplasmas among men with nongonococcal urethritis (NGU).

Secondary objectives of this study are to:

  • determine the sensitivity of persisting organisms to azithromycin and doxycycline by performing minimum inhibitory concentration (MIC) testing
  • determine the relationship between persistence/recurrence of clinical signs and persistent/recurrent detection of M. genitalium and Ureaplasmas among men with NGU treated with azithromycin or doxycycline, measured by follow-up clinical exams and repeated assays performed on specimens collected at follow-up study visits

STUDY DESCRIPTION

1200 men with NGU, ages 16 and older, will be enrolled in a randomized double-blinded treatment trial. Urine samples, oral swabs, and urethral swabs will be obtained from each subject at the initial clinic visit. Urine specimens will be tested for M. genitalium and Ureaplasma. Study participants will be randomly assigned to receive one of two pre-packaged treatments: active doxycycline plus placebo azithromycin or active azithromycin plus placebo doxycycline. Subjects will complete a questionnaire, and will be given a simple standardized log in which they will be asked to keep track of adherence to the study drug, record solicited adverse events, note when symptoms disappear and/or reappear, and document sexual activity between study visits.

Subjects who test positive for M. genitalium or Ureaplasmas at the initial clinic visit will be asked to return for at least two follow-up study visits: at approximately 3 and 6 weeks following the initial clinic visit. During follow-up visits, participants will answer a follow-up questionnaire and will be re-evaluated for signs of urethritis and re-tested for M. genitalium and Ureaplasmas. Study participants with signs and/or symptoms of urethritis or who test positive for M. genitalium or Ureaplasmas at the follow-up study visits will receive a blinded treatment packet containing the alternate medication, or will be offered open-label moxifloxacin if the alternate treatment regimen was administered at the prior follow-up study visit. If additional treatment is administered at the 6-week follow-up study visit, a fourth study visit will be scheduled to occur approximately 9 or 10 weeks following the initial clinic visit.

Study participants who were negative for M. genitalium and Ureaplasma at enrollment will be asked to return for evaluation for a single follow-up study visit, approximately 3 weeks after the initial clinic visit. At this visit they will complete the follow-up questionnaire and provide specimens for future testing.

Conditions
Urethritis
Keywords
NGU, M genitalium, Ureaplasma, azithromycin, doxycycline
Medical subject headings
Urethritis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AzithromycinDrug

    Also called Zithromax, Zmax

    two 500mg tablets or four 250mg tablets administered as a single dose

  • DoxycyclineDrug

    Also called Doryx, Doxychel, Monodox, Oracea

    one 100mg capsule administered twice daily for seven days

Study groups in NCT00358462
Study groupRoleWhat they receive
Active azithromycin+placebo doxycyclineActive comparatorActive azithromycin (1g) and placebo doxycycline
Receives: Drug: Azithromycin
Active doxycycline+placebo azithromycinActive comparatorActive doxycycline and placebo azithromycin
Receives: Drug: Doxycycline

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. mITT Analysis of Eradication of M. Genitalium at First Follow-up Study Visit

    Microbiologic cure of M. genitalium at first follow-up visit (defined as a negative in-house PCR test performed on urine)

    Measured: approximately 3 weeks after initial study visit (allowable window is 2-5 weeks after initial study visit)

  2. mITT Analysis of Eradication of U. Urealyticum at First Follow-up Visit

    Microbiologic cure, defined as negative PCR for U. urealyticum (if cultured), or negative culture at first follow-up visit

    Measured: 3 weeks (allowable window 2-5)

Secondary outcomes (6)
  1. Clinical Cure Among Case Subjects Who Were Positive for M. Genitalium at the Initial Study Visit

    Proportion of men with M. genitalium at the initial study visit who had clinical cure, defined as <5 PMNs/HPF (with or without urethral symptoms) on a urethral Gram stain and absence of urethral discharge at follow-up.

    Measured: approximately 3 weeks after initial study visit (allowable window is 2-5 weeks after initial study visit)

  2. Clinical Cure Among Case Subjects Who Were Positive for Ureaplasmas at the Initial Study Visit

    Proportion of men with Ureaplasma urealyticum at the initial study visit who had clinical cure, defined as <5 PMNs/HPF (with or without urethral symptoms) on a urethral Gram stain and absence of urethral discharge at follow-up.

    Measured: approximately 3 weeks after initial study visit (allowable window is 2-5 weeks after initial study visit)

  3. Minimum Inhibitory Concentrations (MIC) of M. Genitalium for Azithromycin

    In vitro susceptibiities of M. genitalium to azithromycin

    Measured: baseline

  4. Minimum Inhibitory Concentrations (MIC) of M. Genitalium for Doxycycline

    In vitro susceptibilities of M. genitalium to doxycycline

    Measured: baseline

  5. Minimum Inhibitory Concentrations (MIC) of U. Ureaplasma Biovar 2

    In vitro susceptibilities of U. urealyticum biovar 2

    Measured: baseline

  6. Minimum Inhibitory Concentrations (MIC) of U. Parvum

    In vitro susceptibilities of U. parvum

    Measured: baseline

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted31 Jul 2006 (estimated)
  2. Study startJan 2007
  3. Primary completionNov 2011
  4. Study completionNov 2011

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
606 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00358462
Sponsor's protocol ID
26995
Other IDs
05-0143 (protocol number), U19AI031448, R01AI072728
Status last verified
Jul 2018
First submitted
27 Jul 2006
Last updated
15 Aug 2018
Data monitoring committee
Yes

Publications

  • Khosropour CM, Manhart LE, Gillespie CW, Lowens MS, Golden MR, Jensen NL, Kenny GE, Totten PA. Efficacy of standard therapies against Ureaplasma species and persistence among men with non-gonococcal urethritis enrolled in a randomised controlled trial. Sex Transm Infect. 2015 Aug;91(5):308-13. doi: 10.1136/sextrans-2014-051859. Epub 2015 Jan 23.

    PubMed 25616607
  • Khosropour CM, Manhart LE, Colombara DV, Gillespie CW, Lowens MS, Totten PA, Golden MR, Simoni J. Suboptimal adherence to doxycycline and treatment outcomes among men with non-gonococcal urethritis: a prospective cohort study. Sex Transm Infect. 2014 Feb;90(1):3-7. doi: 10.1136/sextrans-2013-051174. Epub 2013 Oct 8.

    PubMed 24106340
  • Manhart LE, Gillespie CW, Lowens MS, Khosropour CM, Colombara DV, Golden MR, Hakhu NR, Thomas KK, Hughes JP, Jensen NL, Totten PA. Standard treatment regimens for nongonococcal urethritis have similar but declining cure rates: a randomized controlled trial. Clin Infect Dis. 2013 Apr;56(7):934-42. doi: 10.1093/cid/cis1022. Epub 2012 Dec 7.

    PubMed 23223595

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Azithromycin and Doxycycline in people with Urethritis, run by University of Washington at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 15 Aug 2018. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 8 Mar 2013). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

mITT Analysis of Eradication of M. Genitalium at First Follow-up Study Visit (time frame: approximately 3 weeks after initial study visit (allowable window is 2-5 weeks after initial study visit)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00358462, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 15 Aug 2018; AzTrials last refreshed its copy on 7 Nov 2026.

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