Table 1.

Results from the 39 A. baumannii isolates showing tobramycin susceptibility testing and molecular typing results^a

Isolate	Disc diffusion (mm/susceptibility)	Etest (MIC [μg/ml]/susceptibility)	Agar dilution (MIC [μg/ml]/susceptibility)	Vitek 0.6 McF (MIC [μg/ml]/susceptibility)b	Broth microdilution (MIC [μg/ml]/susceptibility)	aac(3)-IIa genec	DiversiLab clone
7	0/R	256/R	128/R	≥16/R	>256/R	−	D
40	4/R	8/I	4/S	4/S	>256/R	+	C
3	3/R	32/R	16/R	8/I	256/R	−	D
4	10/R	16/R	8/I	8/I	256/R	−	C
27	0/R	64/R	32/R	≥16/R	256/R	−	D
31	12/R	16/R	16/R	4/S	256/R	+	C
18	13/I	16/R	4/S	8/I	128/R	+	C
36	13/I	8/I	16/R	4/S	128/R	+	C
38	0/R	64/R	16/R	≥16/R	128/R	−	A
10	13/I	16/R	4/S	8/I	64/R	+	C
5	11/R	8/I	8/I	8/I	32/R	+	C
6	14/I	4/S	2/S	2/S	32/R	+	C
11	13/I	16/R	4/S	2/S	32/R	−	C
12	9/R	32/R	8/I	8/I	32/R	+	C
13	11/R	32/R	4/S	4/S	32/R	+	C
17	13/I	16/R	2/S	4/S	16/R	+	C
22	16/S	8/I	2/S	≤1/S	16/R	+	C
23	21/S	2/S	≤0.5/S	≤1/S	16/R	−	B
39	15/S	8/I	2/S	2/S	16/R	+	C
8	13/I	8/I	4/S	4/S	8/I	+	C
9	15/S	8/I	2/S	2/S	8/I	+	C
14	14/I	8/I	4/S	2/S	8/I	+	C
15	15/S	8/I	4/S	4/S	8/I	+	C
20	15/S	4/S	2/S	≤1/S	8/I	+	C
26	0/R	64/R	2/S	≥16/R	8/I	+	C
32	17/S	4/S	2/S	≤1/S	8/I	+	C
33	10/R	16/R	8/I	4/S	8/I	+	C
42	14/I	8/I	4/S	2/S	8/I	+	C
29	14/I	8/I	2/S	2/S	4/S	−	C
24	22/S	2/S	≤0.5/S	≤1/S	2/S	−	C
35	21/S	2/S	≤0.5/S	≤1/S	2/S	−	B
2	19/S	2/S	≤0.5/S	≤1/S	1/S	−	B
16	23/S	2/S	≤0.5/S	≤1/S	1/S	−	A
21	15/S	2/S	≤0.5/S	≤1/S	1/S	−	A
28	23/S	1/S	≤0.5/S	≤1/S	1/S	+	A
30	20/S	2/S	≤0.5/S	≤1/S	1/S	−	A
34	23/S	1/S	≤0.5/S	≤1/S	1/S	−	A
37	21/S	2/S	≤0.5/S	≤1/S	1/S	−	B
41	21/S	2/S	≤0.5/S	≤1/S	1/S	−	C

^aPCR of aac(C)-IIa and DiversiLab results. S, sensitive; I, intermediate, R resistant.

^bShading indicates very major errors; underlining indicates minor errors.

^c+, aac(3)-IIa gene present; −, aac(3)-IIa gene absent.