Table 1. Minimum inhibitory concentrations (µg/mL) of penicillin for the two Korean isolates of group B streptococcus (GBS) with reduced penicillin susceptibility according to different methods.

Isolate	Vitek 2 AST-ST01	E-test	Broth microdilution	Sensititre DKMGN
1	0.25	0.38	0.5	0.25
2	0.25	0.25	0.5	0.25