• Charlotte A Gaydos, Michele-Corinne Ako, Mitra Lewis, Yu-Hsiang Hsieh, Richard E Rothman, and Andrea F Dugas.
• Division of Infectious Diseases, Johns Hopkins University, Baltimore, MD; Department of Emergency Medicine, Johns Hopkins University, Baltimore, MD. Electronic address: cgaydos@jhmi.edu.
• Ann Emerg Med. 2019 Jul 1; 74 (1): 364436-44.

Study ObjectiveIn emergency departments (EDs), diagnosis and treatment of Chlamydia trachomatis and Neisseria gonorrhoeae are challenging. We conducted a randomized clinical trial to assess rapid C trachomatis and N gonorrhoeae testing on overtreatment and undertreatment of women evaluated for C trachomatis and N gonorrhoeae.MethodsWomen undergoing pelvic examinations and C trachomatis and N gonorrhoeae testing (n=254) were randomized to control or rapid test groups. The control group received standard-of-care C trachomatis and N gonorrhoeae nucleic acid amplification tests of endocervical specimens, with 2- to 3-day turnaround times. For the rapid test group, clinicians collected an extra endocervical swab for GeneXpert C trachomatis and N gonorrhoeae rapid testing, in addition to the standard-of-care nucleic acid amplification test swab. Rapid results were immediately provided, and all patients were treated according to providers' clinical judgment.ResultsIn the rapid test group, 7.9% of patients had positive test results for C trachomatis; 3.9% had positive test results for N gonorrhoeae. In the control standard-of-care group, 10.2% of patients had positive nucleic acid amplification test results for C trachomatis; 5.5% had positive results for N gonorrhoeae. Undertreatment for both C trachomatis and N gonorrhoeae in the ED was 0% for the rapid test group and 43.8% for the control standard-of-care group. Clinicians overtreated 46.5% of uninfected standard-of-care control patients for C trachomatis compared with 23.1% of uninfected rapid test patients. For patients uninfected with N gonorrhoeae, clinicians overtreated 46.7% of standard-of-care control patients compared with 25.4% of rapid test patients. The length of stay did not differ significantly between groups.ConclusionRapid C trachomatis and N gonorrhoeae testing in the ED led to a significant reduction in overtreatment for women without infections compared with the standard-of-care control group. Additionally, in the rapid test group there was significant improvement in appropriate treatment for patients with infections.Copyright © 2018 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.

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