# Using fosfomycin to prevent infection following ureterorenoscopy in response to shortage of cephalosporins: a retrospective preliminary study

## TL;DR

This study shows fosfomycin can be a good alternative to cefotiam for preventing infections after a kidney procedure when cefotiam is in short supply.

## Contribution

The study evaluates fosfomycin as a substitute for cefotiam during a drug shortage in a clinical setting.

## Key findings

- Fosfomycin and cefotiam showed similar complication rates in preventing postoperative infections.
- Fosfomycin resulted in lower postoperative C-reactive protein and white blood cell counts compared to cefotiam.
- Fever requiring additional antibiotics was equally frequent in both groups.

## Abstract

In 2019, the shortage of cefazolin led to the demand for cefotiam and cefmetazole exceeding the supply. The Department of Nephro-urology at Nagoya City University Hospital used fosfomycin as a substitute for perioperative prophylaxis. This retrospective preliminary study evaluated the efficacy of fosfomycin and cefotiam for preventing infections following ureterorenoscopy.

The study included 182 patients who underwent ureterorenoscopy between January 2018 and March 2021). Perioperative antibacterial treatment with fosfomycin (n = 108) or cefotiam (n = 74) was administered. We performed propensity score matching in both groups for age, sex, preoperative urinary catheter use, and preoperative antibiotic treatment.

The fosfomycin and cefotiam groups (n = 69 per group) exhibited no significant differences in terms of patients’ median age, operative duration, preoperative urine white blood cell count, preoperative urine bacterial count, and the rate of preoperative antibiotic treatment. In the fosfomycin and cefotiam groups, the median duration of postoperative hospital stay was 3 and 4 days, respectively; the median maximum postoperative temperature was 37.3 °C and 37.2 °C, respectively. The fosfomycin group had lower postoperative C-reactive protein levels and white blood cell count than the cefotiam group. However, the frequency of fever > 38 °C requiring additional antibiotic administration was similar.

During cefotiam shortage, fosfomycin administration enabled surgeons to continue performing ureterorenoscopies without increasing the complication rate.