TABLE 1.

Broth dilution and E-test MICs

Antibiotic	MIC (μg/ml)a determined by:
	Broth dilution				E-test
	All strains tested			ATCC 23344	All strains tested			ATCC 23344
	Range	50%	90%		Range	50%	90%
Amikacin	0.5–4	1	2	1	0.25–1	0.5	0.5	0.5
Gentamicin	0.25–1	0.5	0.5	0.5	0.047–0.125	0.064	0.094	0.064
Netilmicin	0.25–2	0.5	0.5	0.5
Streptomycin	2–8	2	4	2
Tobramycin	0.25–16	0.25	0.5	0.25
Azithromycin	0.25–1	0.5	1	0.5	0.094–0.75	0.25	0.5	0.25
Clarithromycin	4–16	4	16	4
Ofloxacin	0.5–8	1	8	1	0.023–3	0.5	1	0.75
Ciprofloxacin	<0.03–4	0.5	1	1	0.008–0.5	0.125	0.25	0.25
Amoxicillin-clavulanate (2:1)	1–4	2	4	4	0.125–0.5	0.25	0.25	0.19
Amoxicillin	>64	>64	>64	>64
Ampicillin	32–64	64	64	32	2–16	4	6	8
Piperacillin	1–8	4	8	4	0.125–1	0.25	0.38	0.19
Imipenem	0.12–1	0.12	0.25	0.12	0.064–0.19	0.094	0.125	0.094
Ceftazidime	1–6	2	4	2	0.125–1	0.250	0.5	0.125
Cefotaxime	4–6	16	16	8
Cefotetan	16–>64	32	32	32	2–32	8	16	6
Cefuroxime	32–64	64	64	64	1.5–16	3	6	2
Cefazolin	32–>64	>64	>64	>64
Ceftriaxone	16–64	32	32	16	1–32	3	12	1
Aztreonam	32–>64	32	32	32	2–32	4	12	2
Sulfamethoxazole	0.25–>64	4	16	4
Co-trimoxazole	0.25–64	16	32	16	0.003–0.25	0.032	0.125	0.032
Trimethoprim	1–32	8	16	16
Doxycycline	<0.03–0.5	<0.03	0.12	<0.03	<0.016–0.094	0.023	0.032	0.032
Rifampin	2–16	4	8	2
Chloramphenicol	4–64	16	32	32	0.25–24	3	8	8
Quinupristin-dalfopristin	1–32	16	32	16