Investig Clin Urol.  2022 Nov;63(6):663-670. 10.4111/icu.20220147.

Comparison of amikacin with fosfomycin as an add-on to ciprofloxacin for antibiotic prophylaxis in transrectal prostate biopsy: A single-center retrospective study

Affiliations
  • 1Department of Urology, Chonnam National University Medical School, Gwangju, Korea
  • 2Department of Urology, Ewha Womans University College of Medicine, Seoul, Korea

Abstract

Purpose
To assess the effect of ciprofloxacin (CP) and fosfomycin compared with CP and amikacin in patients with a fluoroquinolone (FQ)-resistant rectal flora who have undergone transrectal ultrasound-guided prostate biopsy (TRUSPB).
Materials and Methods
In total, 516 patients with FQ-resistant rectal flora based on rectal swab cultures were divided into two groups according to prophylactic antibiotics. Patients in both groups were administered CP (400 mg, intravenous [IV], twice daily) on the same day as TRUSPB and 1 day after biopsy. The amikacin group (n=260) was administered a single injection of amikacin (1 g, IV) 1 hour before TRUSPB, whereas the fosfomycin group (n=256) was administered fosfomycin (3 g, orally) the night before the procedure. The primary endpoint was the rate of infectious complications in the two groups.
Results
Overall, 13 patients (2.5%) reported infectious complications: 12 patients (4.62%) in the amikacin group compared with 1 patient (0.39%) in the fosfomycin group (risk ratio, 0.09; 95% confidence interval [CI], 0.01–0.65), respectively, which was a statistically significant difference (p=0.017). This corresponds to a number needed to treat of 24 patients (95% CI, 15–65) to prevent one infectious complication. In the multivariate analysis to assess variables related to infectious complications, prophylactic antibiotics with added fosfomycin was associated with infectious complications (odds ratio, 0.060; 95% CI, 0.008–0.459).
Conclusions
In the era of FQ resistance, CP and fosfomycin may reduce the rate of infectious complications compared with CP and amikacin prophylaxis.

Keyword

Antibiotic prophylaxis; Biopsy; Ciprofloxacin; Fosfomycin; Prostate
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