TABLE 1.

Screening for phenotypic susceptibility to BC and PEN among clinical staphylococci

Source	Bacterium	Na	No. of strains with indicated susceptibilityb to:
			BC		PEN
			R	S	R	S
Skin isolatec	CNS	61	30	31	22	39
Skin isolated	CNS	56	17	39	30	26
Bloodstream infection	S. aureus	61	37	24	41	20
	CNS	60	34	26	50	10
Total		238	118	120	143	95

^aN, number of strains studied.

^bSusceptibility was tested by the microdilution method. R, resistant; S, sensitive.

^cIsolates from children with cancer.

^dIsolates from HIV-positive outpatients.