Table 1.

Antimicrobial susceptibility of the 274 Pseudomonas aeruginosa isolates to 13 types of antibiotics (CRPA vs. CSPA).

Antibiotic(s)	CRPA (n = 137)		CSPA (n = 137)		p Value (R%)
	MIC range (μg/mL)	Resistance rate (%)	MIC range (μg/mL)	Resistance rate (%)
Ceftazidime	2–64	60	1–64	12	<0.001
Cefepime	1–64	56	1–64	10	<0.001
Ciprofloxacin	0.25–4	51	0.25–2	3.7	<0.001
Levofloxacin	0.25–8	54	0.25–4	6.7	<0.001
Amikacin	2–64	4.1	2–16	0	0.072
Gentamicin	1–16	18	1–8	1.1	<0.001
Tobramycin	1–16	8.3	1–4	0	0.003
Imipenem	4–16	100	1–4	5.9	<0.001
Meropenem	1–16	87	0.25–4	1.3	<0.001
Piperacillin/tazobactam	4–128	45	4–128	13	<0.001
Cefoperazone/sulbactam	8–64	62	8–64	18	<0.001
Aztreonam	4–64	57	2–64	31	0.008
Polymyxin	0.5–8	5.8	0.5–8	1.9	0.536

CRPA, Carbapenem-resistant Pseudomonas aeruginosa; CSPA, Carbapenem-sensitive Pseudomonas aeruginosa.

Isolates that showed intermediate susceptibility were considered resistance (exclude polymyxin).