TABLE 1.

Results of in vitro selection of linezolid-resistant enterococci

Strain	MIC (μg/ml)a for strain at pass:												Antibiotic-free MIC (μg/ml)b
	1	2	3	4	5	6	7	8	9	10	11	12
E. faecalis
F118	1	2	8	16	16	16	16	32	16	16	32	32	32
F177	1	1	2	2	2	4	4	16	32	32	64	64	64
F217	1	2	8	16	32	32	32	64	64	128	128	128	128
F317	1	1	2	4	16	16	16	32	32	32	32	32	16
ATCC 29212	1	1	2	8	16	32	32	64	64	128	128	128	128
E. gallinarum
Z393	1	1	2	2	4	8	8	8	8	8	8	8	8
E. faecium
EF208	1	1	2	2	2	2	2	4	4	4	8	8	8
EF1347	1	1	2	2	4	4	4	4	4	8	8	8	8
EF1401	1	1	1	2	2	2	2	2	2	2	2	2	2
EF1509	1	1	2	2	2	2	2	2	2	2	2	2	2
EF1644	1	1	1	2	2	2	2	2	4	8	16	16	16

^aMIC by broth dilution. 

^bMIC by agar dilution following one month of growth on antibiotic-free media.