Table 2.

Treatment of Clinical Isolates of MRSA^a

		removing resistance
strain	oxacillin MIC (μg/mL)	[oxacillin] (μg/mL)	[BPEI] (μg/mL)	BPEI MIC (μg/mL)	FICI
1	256	2	16	32	0.508
2	8	2	1	32	0.281
3	64	2	16	16	1.03
4	64	2	8	32	0.281
5	128	2	16	64	0.266
6	32	2	8	64	0.188
7	128	2	16	64	0.266
8	256	2	8	8	1.01
9	32	2	16	64	0.313
10	16	2	32	256	0.25
11	256	2	32	64	0.508
12	64	2	32	128	0.281
13	16	2	4	8	0.625
14	32	2	8	64	0.188
15	16	2	2	256	0.133
16	32	2	2	256	0.125

^aData show the concentration of BPEI required to reduce the MIC of oxacillin to the susceptibility cutoff of 2 μg/mL. Each value is the average of four trials.