TABLE 2.

In vitro susceptibility of 423 strains of E. faecium selected to minimize inclusion of duplicate isolates^a

Antimicrobial	No. of strains	MIC50	MIC90	MIC range
RP 59500	423	1	2	0.25–32
Vancomycin	423	512	512	16–>512
Teicoplanin	423	32	128	0.25–>256
Ampicillin	423	128	256	4–>256
Doxycycline	423	8	32	0.12–64
Rifampin	423	8	>128	≤0.06–>128
Chloramphenicol	423	8	8	4.0–64
Novobiocin	423	0.5	1	0.25–16
Erythromycin	423	>128	>128	1–>128
Ciprofloxacin	381	>128	>128	1–>128

^aSee Table 1, footnote a.