The efficacy of faropenem for patients with acute cystitis caused by extended spectrum β-lactamase producing Escherichia coli.

The number of patients with acute cystitis caused by extended spectrum β lactamase (ESBL)-producing Escherichia coli (E. coli) is increasing gradually. Although it is reported that ESBL-producing E. coli are sensitive to faropenem (FRPM), there are few clinical studies on the efficiency of FRPM against acute cystitis caused by the bacteria. Therefore, we retrospectively reviewed the medical charts of patients with acute cystitis caused by ESBL-producing E. coli who were treated with the oral antimicrobial agent faropenem (FRPM) in our institution from June 2011 to May 2015.