The clinical efficacy of garenoxacin for male non-gonococcal urethritis
2019
Abstract Sitafloxacin (STFX) is an alternative treatment against azithromycin-resistant Mycoplasma genitalium (MG), whereas STFX-resistant MG have appeared recently. Therefore, another antimicrobial regimen for non-chlamydial non-gonococcal urethritis (NGU) is required. Garenoxacin (GRNX) is a fluoroquinolone against respiratory infections, not against urethritis in Japan, but its in-vitro antimicrobial activity against MG is known as similar to or higher than that of moxifloxacin. To clarify the efficiency of GRNX against MG, we examined the clinical efficacy of GRNX for NGU. Seventy-nine male patients with NGU were enrolled and treated with GRNX once daily for 7 days. For assessing microbiological and clinical efficacies, the bacteria including Chlamydia trachomatis (CT), MG, Mycoplasma hominis (MH), Ureaplasma urealyticum (UU) and Ureaplasma parvum (UP) were detected by means of nucleic acid amplification tests before- and after-treatment. After excluded 3 patients, seventy-six patients were evaluated: the median age; 31 (20–61) years, vaginal infection (66%); the most common infectious route and commercial sex worker (43%); the most common source. There were 50 bacteria-positive NGU cases, including 10 multiple bacterial infections. Clinical cure rate was 85.7% (36/42). Detection frequency of each bacterium was similar to the previous reported. The eradication rates of CT, MG, MH, UU and UP were 96.1%, 71.4%, 100%, 85.7% and 100%, respectively. These results indicate that GRNX has the excellent efficacies for NGU except those of MG. Further study of drug-resistant MG urethritis; for instance, studies on the clinical effectiveness of long-term such as 2-week medication of GRNX or the efficacy of alternative treatment regimens are necessary.
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