Abstract
We investigated the isolation rates of the four species of ESBL-producing intestinal bacteria isolated from urine and blood in four medium-size hospitals in fiscal years 2007, 2009, and 2011. Regarding the transition of the number of ESBL-producing isolates from both urine and blood, the number increased with each passing year in both outpatients and inpatients. The ESBL-producing bacteria with the highest isolation ratios are Proteus mirabilis, Escherichia coli, Klebsiella oxytoca, and Klebsiella pneumoniae, in this order.
Significant differences in the isolation rates of ESBL-producing bacteria from inpatients among facilities were observed. These results suggest that active fecal surveillance on admission for patients with risk factors would be useful for hospital infection control.
