The predominant organism causing urinary tract infections among outpatients is E. coli. Sensitivities for E. coli isolates submitted for outpatients in 2015-2017 are summarized below. Note that these may underestimate the likelihood of resistance among patients with extensive prior antimicrobial treatment.
|Drug||Percent susceptible (of 115 isolates; 95% CI)|
|Cephalexin*||97 (91, 99)|
* Cephalexin susceptibility determined using breakpoint = 16 for uncomplicated UTI, based on cefazolin MIC
** Nitrofurantoin should only be used for cystitis, in patients with CrCl>60ml/min