TABLE 4.

AG susceptibility of strain SR362 compared to the susceptibility of 43 other GBS isolates obtained from invasive infections

Antibiotic	Disk diffusion results			MIC (μg/ml) as determined by:				Synergy with PENa
	Disk content (μg)	Zone diam (mm)		Etest		Agar dilution
		SR362	Otherb	SR362	Otherb	SR362	Otherb	SR362	Otherb
GEN	120	10	15-20	128	32	128	32	No	Yes
KAN	120	6	6-15	>256	>256	>2,048	256-512	No	Yes
	1,000	6	17-20
AMK	NTc	NT	NT	>256	128->256	>2,048	256	No	Yes
STR	300	15	14-22	256	256	256	256	Yes	Yes

^aSynergy was considered when the bacterial concentration diminished >2 logs for the combination respective to PEN after 6 h of incubation at 35°C.

^bThat is, the other 57 isolates obtained during the study.

^cNT, not tested.