Table 3.

Antimicrobial susceptibilities of 24 ST463 and 26 Non-ST463 Carbapenem-Resistant P. aeruginosa isolates.

Antibiotic(s)	ST463 (n = 24)				Non-ST463 (n = 26)				P value (R%)
	Resistance rate (%)	MIC50 (μg/mL)	MIC90 (μg/mL)	MIC range (μg/mL)	Resistance rate (%)	MIC50 (μg/mL)	MIC90 (μg/mL)	MIC range (μg/mL)
Imipenem	100	256	256	32 - 512	100	32	256	8 - 256	1
Meropenem	100	256	256	128 - 512	84.6	16	256	0.125 - 256	0.138
Piperacillin-tazobactam	91.7	>256	>256	16 - 512	26.9	16	256	4 - 512	<0.001
Ceftazidime	95.8	256	256	8 - 256	19.2	8	256	2 - 128	<0.001
Cefepime	95.8	128	256	16 - 512	30.8	8	128	2 - 256	<0.001
Amikacin	12.5	8	256	2 - 256	0	8	16	1 - 32	0.206
Gentamicin	20.8	8	256	2 - 256	30.8	8	16	1 - 32	0.424
Ciprofloxacin	100	32	64	16 - 64	38.5	1	32	0.25 - 32	<0.001
Levofloxacin	100	128	128	32 - 128	42.3	4	64	1 - 128	<0.001
Aztreonam	100	256	256	32 - 512	42.3	16	256	1 - 256	<0.001
Ceftazidime-avibactam	8.3	8	8	2 - 256	3.8	2	8	1 - 32	0.943
Polymyxin	0	1	1	1 - 2	3.8	1	2	1 - 4	1

Bolded p-values indicate P ≤ 0.05.