Table 2. The MICs of oxacillin for different S. aureus strains (the broth microdilution method).

	In USA300 Strain MIC (mg/L)	In USA500 Strain MIC (mg/L)
WT	64	64
ΔarlRS	4	8
ΔarlRS:: arlRS(Plasmid)	64	64
ΔarlRS:: PCN-spx	4	ND
ΔarlRS:: PCN-spx + CdCl2	64	ND
ΔarlRS:: PCN-trfA	4	ND
ΔarlRS:: PCN-trfA + CdCl2	16	ND
ΔmgrA	32	ND
WT:: pMX	64	64
WT:: pMX-spx	64	64
WT:: pMX + ATc	32	32
WT:: pMX-spx + ATc	<0.25	<0.125