Table 1.

Susceptibility of different E. coli isolates to cephalosporins and carbapenems

Drug	MIC (μg/ml) for each isolate (date of isolation, specimen type)a
	EC-1 (14/9/2007, urine)	EC-2 (28/7/2009, bile)	EC-3 (30/7/2009, abdomen)	EC-8 (11/8/2009, abdomen)	EC-9 (12/11/2009, abdomen)	EC-11 (30/7/2009, urine)	EC-13 (23/10/2009, abdomen)
Cefotaxime	≥32	≥32	≥32	≥32	≥32	4	4
Ceftazidime	16	32	32	≥256	≥256	32	32
Ceftriaxone	≥32	≥32	≥32	≥32	≥32	2	2
Cefepime	2	≥16	≥16	≥16	≥16	0.5	0.5
Imipenem	0.125	0.125	0.125	≥32	≥32	0.125	0.125
Meropenem	0.012	0.125	0.125	≥32	≥32	0.012	0.012

^aThe susceptibility (MIC in μg/ml) of the isolates was determined by Etest. The dates of isolation are formatted as day/month/year.