TABLE 1.

C. difficile, E. faecalis, and E. faecium strains and MICs used in this study

Organism	Strain	ATCC strain no.	MIC (μg/ml)
			Surotomycin	Vancomycin	Rifampin
C. difficile	QC	700057	1	1	<0.001
	BI		0.5	0.5	<0.001
	BK		0.5	0.5	<0.001
	K		0.5	2	<0.001
E. faecalis	VSEfs	49452	0.5	1	0.125
	VREfs	700802	0.25	64	0.5
E. faecium	VSEfm	6569	0.5	0.5	16
	VREfm	51559	1	>64	4