TABLE 1.

Ranges of MICs for NAP1/TOX III and non-NAP1/TOX III C. difficile isolates from patients with presumed CA-CDIs in nine FoodNet states in 2006

Drug	All isolates (n = 92)			NAP1/TOX III (n = 14)			Others (n = 78)
	MIC50	MIC90	MIC range	MIC50	MIC90	Range	MIC50	MIC90	MIC range
Moxifloxacin	1a	16	≤0.5-256	16	128	1-256	1	16	≤0.5-128
Levofloxacin	4	128	≤0.5-256	64	128	2-256	4	64	≤0.5-256
Ciprofloxacin	8	64	2-256	128	256	4-256	8	32	2-64
Clindamycin	4	256	≤0.5->256	2	128	1-128	4	256	≤0.5->256
Erythromycin	1	>256	≤0.5->256	>256	>256	≤0.5->256	1	>256	≤0.5->256
Metronidazole	0.5	2	≤0.25-4	2	4	0.5-4	0.5	1	≤0.25-4
Vancomycin	0.5	1	≤0.25-2	0.5	2	0.5-2	0.5	1	≤0.25-2

^aValues are in micrograms per milliliter.