Urinary Tract Infections due to Multidrug-Resistant Enterobacteriaceae: Prevalence and Risk Factors in a Chicago Emergency Department

Table 2

Distribution of 451 unique Enterobacteriaceae bacteria with and without multidrug resistance (MDR) isolated from 431 study patients.

Enterobacteriaceae bacteria	All isolates; (𝑁=451)	MDR isolates; (𝑁=86)	Non-MDR isolates; (𝑁=365)	𝑃^a
Escherichia coli	323 (72)	65 (76)	258 (71)	0.37
Klebsiella spp.	66 (15)	4 (5)	62 (17)	0.002
Proteus mirabilis	32 (7)	5 (6)	27 (7)	0.61
Citrobacter spp.	17 (4)	5 (6)	12 (3)	0.27
Enterobacter spp.	9 (2)	3 (3)	6 (2)	0.38
Serratia spp.	2 (0.4)	2 (2)	0 (0)	—
Providencia spp.	2 (0.4)	2 (2)	0 (0)	—

Data are in number (%) unless otherwise indicated.
^aCompared between MDR and non-MDR isolates.