TABLE 4.

Comparison of MIC results by Etest and agar dilution

Antibiotic	Methoda	MIC (μg/ml) for Bacillus species (no. tested)
		B. anthracis (10)a			B. cereus (15), B. thuringiensis (4), and B. mycoides (3)
		Range	50%	90%	Range	50%	90%
Amoxicillin-clavulanic acid	Etest	0.016-0.5	0.032	0.5	1.5-16	8	16
	AD	0.015-0.06	0.03	0.06	0.015-8	2	4
Cefotaxime	Etest	>32	>32	>32	0.1->32	>32	>32
	AD	16-64	32	32	0.015->64	32	>64
Ciprofloxacin	Etest	0.047-0.094	0.064	0.094	0.094-0.38	0.125	0.25
	AD	0.06	0.06	0.06	0.03-0.125	0.125	0.25
Erythromycin	Etest	0.5-4	0.75	1	0.064-6	0.25	2
	AD	0.5-2	1	2	0.5-4	0.5	4
Gentamicin	Etest	0.064-0.5	0.25	0.38	0.125-0.75	0.25	0.75
	AD	0.25-0.5	0.25	0.5	0.25-1	0.5	1
Penicillin	Etest	<0.016->32	<0.016	0.023	1.5->32	>32	>32
	AD	0.015-0.5	0.015	0.015	0.125-16	8	16
Tetracycline	Etest	0.016-0.032	0.023	0.032	0.05-32	0.75	16
	AD	0.015-0.06	0.015	0.03	0.015-32	0.25	4
Vancomycin	Etest	1-3	2	3	0.75-4	3	4
	AD	1-4	4	4	0.015-4	2	4

^aAD, agar dilution.