Table 1. Comparison of the antimicrobials susceptibility between UPEC and commensal E. coli strains.

Antimicrobial agents	UPEC isolates (n = 70)				Commensal E. coli strains (n = 41)				P value
	MIC range (µg/ml)	MIC50	MIC90	S%	MIC range (µg/ml)	MIC50	MIC90	S%
Piperacillin	1–256	128	256	14	0.5–256	2	64	73	<0.0001
Piperacillin/tazobactam	0.25–256	2	4	91	0.5–16	1	2	100	0.0539
Cefazolin	0.06–256	128	256	21	0.5–256	1	64	83	<0.0001
Cefuroxime	2–256	256	256	39	2–256	2	256	85	<0.0001
Cefotaxime	0.06–256	8	256	43	0.06–128	0.06	8	85	<0.0001
Ceftazidime	0.06–256	0.5	32	71	0.06–32	0.125	0.25	98	0.0007
Cefepime	0.06–256	1	16	79	0.06–8	0.06	1	100	0.0014
Imipenem	0.06–0.25	0.06	0.125	100	0.06–125	0.06	0.06	100	-
Gentamicin	0.25–256	64	128	43	0.5–256	1	64	85	<0.0001
Amikacin	1–256	2	8	90	1–4	2	2	100	0.0364
Ciprofloxacin	0.06–256	32	128	31	0.06–16	0.06	1	90	<0.0001
Nitrofurantoin	4–128	8	16	99	4–32	8	16	100	0.4420