Klebsiella ESBL bacteremia-mortality and risk factors.

Background: Extended spectrum β-lactamase (ESBL)-producing bacteria have become recognized as a problem in South America. The aim of this study was to evaluate risk factors and mortality rate in bacteremia caused by ESBL-producing Klebsiella pneumoniae in a Brazilian hospital.

Methods: A three-year retrospective cohort study with 104 cases of K.