TABLE 1.

Correlation of linezolid resistance levels with percentage of mutated 23S rRNA genes^a

Enterococcal strain	Linezolid MIC (μg/ml)	No. of mutated genes/total no. of 23S genes (%)
E. faecium LS-1	2	0/6 (0)
E. faecium LR-6	8	1/6 (17)
E. faecium LR-9	16	1/6 (17)
E. faecium LR-1	32	2/6 (33)
E. faecium LR-3	32	2/6 (33)
E. faecium LR-5	32	2/6 (33)
E. faecium LR-8	32	3/6 (50)
E. faecium LR-7	64	4/6 (67)
E. faecium LR-4	64	5/6 (83)
E. faecalis LR-2	128	4/4 (100)

^aDetected by sequencing (or MaeI digestion) of PCR-amplified 23S rRNA genes.