TABLE 2.

Antimicrobial susceptibilities of isolates of GNR positive for bla_IMP gene

Drug	MIC (μg/ml)a
	P. aeruginosa (n = 53)			Other GNF bacteria (n = 13)			S. marcescens (n = 13)
	Range	50%	90%	Range	50%	90%	Range	50%	90%
Piperacillin	16–>128	64	>128	32–>128	>128	>128	16–>128	16	>128
CAZ	64–>128	>128	>128	64–>128	128	>128	64–>128	>128	>128
Aztreonam	1–>128	8	128	16–>128	128	>128	1–>128	2	16
Cefozopran	128–>128	>128	>128	128–>128	>128	>128	128–>128	>128	>128
IPM	2–>128	8	>128	8–>128	128	>128	16–>128	>128	>128
Meropenem	4–>128	16	>128	8–>128	>128	>128	128–>128	>128	>128
Gentamicin	0.25–>128	>128	>128	16–>128	>128	>128	2–>128	4	32
Ciprofloxacin	0.06–32	4	32	0.125–32	16	32	0.5–>128	2	4

^a50% and 90%, MICs at which 50 and 90% of isolates are inhibited, respectively.