Table 4. Drug Concentrations in Fecal Samples of Selected Compounds.

	MIC, μg·mL–1a	selectivityb	dose, mg·kg–1	μg g–1 feces	conc. feces/MIC
4	0.25	1	20	2.8	11
5c	0.125	128	20	13	108
87	0.125	1024	10	0.79	6.6
107	1	≥256	20	2.4	2.4
108	1	64	20	49	49
116	0.50	128	20	3.7	7.4

^aC. difficile strain, ATCC 43255, ribotype 087.

^bSelectivity is defined as MIC_MRSA/MIC_{C. difficile}.

^cReported previously; included for ease of comparison.