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RecruitingNCT05286931Updated Mar 18, 2022

SpeeDx Ciprofloxacin gyrA Assay for N. Gonorrhoeae Gonococcal Infection

An interventional study of Ciprofloxacin 500 mg in Neisseria Gonorrhoeae Infection, sponsored by University of Washington. Recruiting at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-03-18.

Sponsored by University of Washington · Not applicable, Interventional, and Other

From the registry’s dates

  • Primary completion was expected by Dec 2025, 9 months ago, but the record still lists the study as recruiting.
  • Started Mar 2022; still recruiting 4 years 7 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
1,800
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study aims to test the effectiveness of using of SpeeDx Resistance Plus assay to guide treatment of Neisseria gonorrhoeae (Ng) in a sexual health clinic setting.

Read the detailed description

Patients entering the Sexual Health Clinic will be offered participation in the study if they have; 1) no infectious genitourinary symptoms that require immediate treatment, 2) who seek routine STI screening, 3) if they report sexual contact with a partner who reports having Ng or 4) men who have sex with men (MSM) with contact to chlamydia trachomatis (CT).

All participants will have specimen collected from anatomical sites of exposure for NAAT and culture. NAAT specimen positive for Ng will be flagged and further tested with SpeeDx Resistance Plus assay. This will delay results reporting on average by 1 day. The assay detects Ciprofloxacin resistance based on a point mutation of the gyrA gene (gyrA s91). Participants without this mutation or wild-type (gyrA WT) infection should be sensitive to Ciprofloxacin.

Participants who are N. gonorrhoeae (NG) positive and gyrA WT, will receive ciprofloxacin 500 mg PO x 1.

Participants with gyrA s91 mutation will be asked to return to clinic for the standard of care (i.e. ceftriaxone-based therapy).

02

Conditions studied

  • Neisseria Gonorrhoeae Infection

Keywords

  • antimicrobial resistance
  • ciprofloxacin
  • molecular diagnostics
03

In context

Infections

6,687 studies on the registry are indexed under Infections; 807 are open to participants now.

This study's planned enrollment of 1,800 is above the median of 120 across 4,200 interventional studies indexed under Infections.

Browse Infections studies →

Lead sponsor

University of Washington is the lead sponsor of 1,397 studies on the registry; 225 are open to participants now.

Of its 154 completed or terminated interventional studies of FDA-regulated products, 132 (86%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • English speaking
  • Have access to the internet (via computer or phone) on at least a weekly basis
  • Asymptomatic (as defined below)

Exclusion criteria

Exclusion Criteria:

  • Urogenital symptoms consistent with a sexual transmitted infection (other than vaginitis associated with trichomonas vaginalis, bacterial vaginosis or yeast). Symptoms consistent with cervicitis, urethritis, or PID will not be offered enrollment.
  • Antibiotic use within the last 2 weeks
  • Contact to syphilis
  • Contact to an STI and are unwilling to defer empiric treatment until diagnostic test results return
  • Anyone receiving a gonococcal-active drug (such as Doxycycline, Penicillin, Ceftriaxone) during the visit. Those receiving metronidazole, fluconazole, or clotrimazole will not be excluded.
  • Known allergy to ciprofloxacin and/or ceftriaxone
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
1,800 participants (estimated)

Study arms

  • Experimental
    N. gonorrhea (gyrA wildtype) -Ciprofloxacin Treatment Arm

    Participants who are N. gonorrhea (NG) positive and gyrA WT, will receive ciprofloxacin 500 mg PO x 1.

    Drug: Ciprofloxacin 500 mg

Interventions

  • DrugCiprofloxacin 500 mg

    Ciprofloxacin 500 MG, taken once orally.

06

What researchers measure

Primary outcomes

  1. Determine the number and proportion of Neisseria Gonorrhea (NG) cases that can be cured with ciprofloxacin

    Number and proportion of patients who test positive for Neisseria Gonorrhea (NG) and are gyrA wildtype of all patients enrolled/screened for NG

    Time frame: 2 years

  2. To determine the effectiveness of treating patients with Neisseria Gonorrhea gyrA wildtype with Ciprofloxacin 500 mg orally once

    Number and proportion of NG-positive patients with gyrA wildtype who are cured (i.e. have negative test of cure results) with 500mg ciprofloxacin overall and by anatomic site

    Time frame: 2 years

Secondary outcomes

  1. To confirm the SpeeDx gyrA Cipro-susceptibility prediction accuracy as compared to phenotypic susceptibility result

    Percent concordance of gyrA result (molecular diagnostic) and the ciprofloxacin minimal inhibitory concentration (MIC) (aka. phenotypic antimicrobial susceptibility testing)

    Time frame: 2 years

  2. To determine time from screening to treatment using SpeeDx gyrA assay

    Number of days between screening and treatment by treatment group (Ciprofloxacin or Standard of care)

    Time frame: 2 years

07

Study locations

1 of 1 sites recruiting
  • Public Health -- Seattle & King County Sexual Health Clinic
    Seattle, Washington 98104, United States
    • Angela LeClair, ND · Contact
    Recruiting
08

References and documents

Publications

  • Siedner MJ, Pandori M, Castro L, Barry P, Whittington WL, Liska S, Klausner JD. Real-time PCR assay for detection of quinolone-resistant Neisseria gonorrhoeae in urine samples. J Clin Microbiol. 2007 Apr;45(4):1250-4. doi: 10.1128/JCM.01909-06. Epub 2007 Jan 31. PubMed 17267635 ↗
  • Hooper DC, Wolfson JS. Fluoroquinolone antimicrobial agents. N Engl J Med. 1991 Feb 7;324(6):384-94. doi: 10.1056/NEJM199102073240606. No abstract available. PubMed 1987461 ↗
  • Allan-Blitz LT, Wang X, Klausner JD. Wild-Type Gyrase A Genotype of Neisseria gonorrhoeae Predicts In Vitro Susceptibility to Ciprofloxacin: A Systematic Review of the Literature and Meta-Analysis. Sex Transm Dis. 2017 May;44(5):261-265. doi: 10.1097/OLQ.0000000000000591. PubMed 28407640 ↗
  • Klausner JD, Bristow CC, Soge OO, Shahkolahi A, Waymer T, Bolan RK, Philip SS, Asbel LE, Taylor SN, Mena LA, Goldstein DA, Powell JA, Wierzbicki MR, Morris SR. Resistance-Guided Treatment of Gonorrhea: A Prospective Clinical Study. Clin Infect Dis. 2021 Jul 15;73(2):298-303. doi: 10.1093/cid/ciaa596. Erratum In: Clin Infect Dis. 2021 Mar 1;72(5):911. doi: 10.1093/cid/ciaa1379. PubMed 32766725 ↗
  • Hadad R, Cole MJ, Ebeyan S, Jacobsson S, Tan LY, Golparian D, Erskine S, Day M, Whiley D, Unemo M; European collaborative group. Evaluation of the SpeeDx ResistancePlus(R) GC and SpeeDx GC 23S 2611 (beta) molecular assays for prediction of antimicrobial resistance/susceptibility to ciprofloxacin and azithromycin in Neisseria gonorrhoeae. J Antimicrob Chemother. 2021 Jan 1;76(1):84-90. doi: 10.1093/jac/dkaa381. PubMed 32929456 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 18, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05286931
Lead sponsor
University of Washington
Responsible party
Lindley Barbee (Associate Professor: School of Medicine Allergy and Infectious Diseases, University of Washington) — Principal investigator
First posted
Mar 18, 2022
Start date
Mar 3, 2022
Primary completion
Dec 31, 2025 (estimated)
Completion
Dec 31, 2026 (estimated)
Last update
Mar 18, 2022

Study contacts

Angela LeClair
Contact
achein@uw.edu
206-744-0489
Lindley Barbee, MD, MPH
principal investigator · University of Washington

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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