TABLE 1.

Antibiotic susceptibilities of 113 GBS strains

Antibiotic	MIC50a (μg/ml)	MIC90 (μg/ml)	MIC range
Penicillin	0.032	0.064	<0.032-0.064
EM	0.032	256	0.016->256
CM	0.016	256	0.016->256
TC	32	64	0.064-256
MN	16	32	0.064-64
Gentamicin	8	16	8-16
KM	32	32	16->1,024
SM	32	32	16->1,024
Rifampin	0.25	0.5	0.125-1
Vancomycin	0.25	0.5	0.25-0.5

^aMIC₅₀, MIC for 50% of the strains tested.