. 2001 Sep;45(9):2594–2597. doi: 10.1128/AAC.45.9.2594-2597.2001

TABLE 2.

MICs of ampicillin for various E. faecium strains

E. faecium strain	MIC [μg/ml] of ampicillin (range for derivatives)^a
BM4107	2 (ND)
D344	24 (ND)
H80721	512 (ND)
D344S	0.03 (ND)
D344S/pAT392	0.03 (ND)
D344S/pSF1(pbp5_BM4107)	6 (8–12)
D344S/pSF2(pbp5_D344)	12 (20–56)
D344S/pSF3(pbp5_H80721)	20 (40–128)
D344S/pSF4(pbp5_BM4107M₄₈₅A)	16 (40–56)

MIC ranges were determined for derivatives only. Derivatives were selected on BHI agar containing ampicillin at a concentration two times the MIC. ND, not done.