UCSF Medical Center Antimicrobial Susceptibility Outpatient Ecoli Susceptibilities 2015


The predominant organism causing urinary tract infections among outpatients is E. coli.  Sensitivities for E. coli isolates submitted for outpatients in 2015 are summarized below.  Note that these may underestimate the likelihood of resistance among patients with extensive prior antimicrobial treatment.

Drug Percent susceptible
Cephalexin (when used for lower urinary tract infections) 88%
Ciprofloxacin 70%
Nitrofurantoin* 98%

* Nitrofurantoin should only be used for cystitis, in patients with CrCl>60ml/min