Table 1. Summary of MIC and FICI values of the 8 enterococci strains.

Strains	MIC (mg/L)				MICcombination		FICI
	VAN	LNZ	FOS		LNZ/FOS		LNZ + FOS
No. 1	4	2	64		0.03125/64		1.015
No. 2	4	2	128		0.5/32		0.5
No. 3	2	2	128		1/32		0.75
No. 4	2	4	256		0.5/128		0.625
No. 5	1	4	128		1/32		0.5
No. 8	128	2	128		1/32		0.75
ATCC 29212	1	2	128		1/64		1
ATCC 51299	256	2	128		0.5/32		0.5

VAN: ≤4 mg/L, susceptible (S); 8–16 mg/L, intermediate (I); ≥32 mg/L, resistant (R). LNZ: ≤2 mg/L, susceptible (S); 4 mg/L, intermediate (I); ≥8 mg/L, resistant I. FOS: ≤64 mg/L, susceptible (S); 128 mg/L, intermediate (I); ≥256 mg/L, resistant (R). MIC, minimum inhibitory concentration; VAN, vancomycin; LNZ, linezolid; FOS, fosfomycin; LNZ + FOS, linezolid-fosfomycin combination; FICI, fractional inhibitory concentration index.