TABLE 3.

Isogenic strain MBCs

Strain	MBC (μg/ml)a
	Chlorhexidine		Chlorhexidine digluconate		Benzalkonium chloride		Cetrimide		Pentamidine isethionate		Ethidium bromide
	Median	Max	Median	Max	Median	Max	Median	Max	Median	Max	Median	Max
RN4220	3.2	3.2	2	8	8	8	4	4	25	50	16	32
RN4220 ΔnorA	3.2	3.2	4	4	8	8	2	2	3.1	3.1	2	8
RN4220 ΔnorA (pCN51-norA)	3.2	3.2	4	4	8	8	8	8	50	50	16	16
RN4220 N1	3.2	3.2	4	4	8	8	4	8	50	50	32	32
RN4220 N2	3.2	3.2	8	16	16	16	8	16	100	100	32	64
RN4220 (pCN38)	3.2	3.2	4	4	4	8	2	4	25	25	16	16
RN4220 (pCN38-qacC [pSK89])	3.2	3.2	2	4	8	8	4	4	25	25	32	32
RN4220 (pCN38-qacC [pSK41])	3.2	3.2	4	8	32	32	8	16	25	25	256	256
RN4220 (pCN38-qacA qacR)	3.2	3.2	4	8	16	16	8	16	400	800	256	256
RN4220 ΔnorA (pCN38-qacA qacR)	3.2	3.2	8	16	16	32	4	8	400	400	128	128
RN4220 (pCN38-qacA qacR qacC [pSK41])	3.2	6.4	8	8	16	16	16	16	200	200	256	256
RN4220 (pCN38-qacA qacR qacC [pSK89])	3.2	3.2	8	8	32	64	16	16	200	200	128	128
RN4220 N1 (pCN38-qacA qacR)	6.4	6.4	4	8	16	16	16	16	400	400	256	256
S. aureus 2014.C02	3.2	3.2	8	8	16	16	8	16	400	800	256	512

^aValues are from 3 independent replicates. Values in italics indicate an MBC less than that of the wild type. Bold values indicate an MBC greater than that of the wild type.