Table 4.

MIC for antimicrobial agents tested against 77 C. difficile isolates

Antibiotic	MIC (μg/ml)	Resistant	Break points (μg/ml)
	Range	no. (%)
Clindamycin	0.25 > 256	33 (42.8)	≥ 8
Metronidazole	0.125–8	0	≥ 32
Rifampin	0.002 > 32	9 (11.7)	≥ 32
Moxifloxacin	0.5 > 32	30 (38.9)	≥ 4
Vancomycin	0.016–0.5	0	> 2
Fusidic acid	0.016 > 8	2 (2.6)	≥ 32