Table 2.

Antimicrobial susceptibilities of A. baumannii isolates.

Method	Antimicrobial	19606		17978		NFAb-1		NFAb-2
		MIC a	CI b	MIC a	CI b	MIC a	CI b	MIC a	CI b
E-test	Ceftazidime	12	*	6	S	≥256	R	≥256	R
	Cefepime	24	*	3	S	64	R	≥256	R
	Ciprofloxacin	0.75	S	0.25	S	≥32	R	≥32	R
	Colistin	0.125	S	0.38	S	0.25	S	0.25	S
	Gentamicin	12	R	1.5	S	≥256	R	≥256	R
	Levofloxacin	0.5	S	0.19	S	≥32	R	≥32	R
	Meropenem	1.5	S	0.75	S	≥32	R	≥32	R
	Tigecycline	2	*	0.38	*	1.5	*	2	*
	Tobramycin	3	S	0.5	S	96	R	64	R
	Trimethoprim-sulfamethoxazole	≥640	R	≥640	R	≥640	R	≥32	R
VITEK-2	Ampicillin	≥32	R	≥32	R	≥32	R	≥32	R
	Ampicillin-sulbactam	≤2	S	≤2	S	≥32	R	≥32	R
	Cefazolin	≥64	R	≥64	R	≥64	R	≥64	R
	Cefepime	16	I	2	S	≥64	R	≥64	R
	Cefoxitin	≥64	R	≥64	R	≥64	R	≥64	R
	Ceftazidime	8	S	4	S	≥64	R	≥64	R
	Ciprofloxacin	0.5	S	≤0.25	S	≥4	R	≥64	R
	Ceftriaxone	16	I	16	I	≥64	R	≥4	R
	Gentamicin	4	S	≤1	S	≥16	R	≥16	R
	Levofloxacin	0.25	S	≤0.12	S	≥8	R	≥8	R
	Meropenem	1	S	≤0.25	S	≥16	R	≥16	R
	Nitrofurantoin	256	R	≥512	R	256	R	256	R
	Piperacillin-tazobactam	≤4	S	≤4	S	≥128	R	≥128	R
	Tobramycin	≤1	S	≤1	S	8	I	8	I
	Trimethoprim-sulfamethoxazole	160	R	160	R	≥320	R	≥320	R
Kirby-Bauer		ZOI c	CI b	ZOI c	Ci b	ZOI c	CI b	ZOI c	CI b
	Doxycycline	27	S	26	S	27	S	28	S

^aMinimum inhibitory concentration (MIC) values are presented in micrograms per milliliter.

^bThe categorical interpretation (CI) of susceptibility are noted as follows: R, resistant; S, susceptible; I, intermediate; *, no interpretive criteria.

^cZone of inhibition (ZOI) diameters are reported in millimeters.