TABLE 4.

Comparison of the various antimicrobial agents against the 401 isolates of B. fragilis group

Antimicrobial agent	MIC (μg/ml)				%Sa
	Range	Mode	50%	90%
Piperacillin-tazobactam	≤0.06–32	0.12	0.25	4	100
Ampicillin-sulbactam	≤0.03–>64	1	2	16	89
Penicillin G	≤0.015–>32	8	8	>32	0
Cefoxitin	≤0.015–>32	4	4	16	92
Imipenem	≤0.015–8	0.03	0.06	0.25	99.8
Meropenem	≤0.015–>32	0.12	0.12	0.5	98.8
Ciprofloxacin	≤0.015–>32	4	8	32	10
Trovafloxacin	≤0.008–>16	0.25	0.25	2	92.8
Clindamycin	≤0.008–>16	>16	1	>16	71
Metronidazole	≤0.12–4	0.5	0.5	1	100

^aPercent susceptible isolates.