TABLE 1.

Properties of the S. epidermidis strains used in this study

Strain	Pulse type	Resistancea	mecI	EOP (10−5) with oxacillin		Oxacillin MIC (μg/ml)b
				20 μg/ml	100 μg/ml	No induction	Inductionc
SE12	I	Tetr	+	1,300	300	16	64
SE20	II	Tetr	+	3	2	8	128
SE20ΔmecI	II	Tetr Minr	−	8	6	128	512
SE22	III	Genr	+	36	78	64	256
SE42	IV		+	4	2	8	256
SE42ΔmecI	IV	Tetr Minr	−	7	5	128	NDd
SE43	V	Tetr	+	680	2	1	8
SE53	VIa	Genr Chlr	+	0.8	0.4	1	128
SE53ΔmecI	VIa	Genr Chlr Tetr Minr	−	0.4	0.4	128	256
SE54	VIb	Genr	+	9	0.7	64	128
SE24	VIc	Genr Chlr Eryr	+	1,800	65	4	256
SE34	VII	Genr Chlr Eryr	+	2	7	4	32
SE65	VIII	Tetr Eryr	+	15	3	128	256
SE1	IXa	Eryr	Ile66→Asn	1	0.6	1	32
SE2	IXb	Tetr Eryr	Ile66→Asn	2,700	600	2	128
SE13	X	Chlr Eryr	+	3,800	120	64	128
SE33	XI	Genr Eryr	+	230	19	64	128
SE55	XII	Tetr Eryr	+	4,300	1,000	32	128
SE60	XIII	Tetr Eryr	+	0.1	0.1	1	1
SE407	XIV	Tetr Eryr	+	1,700	545	4	128

^aGen, gentamicin; Chl, chloramphenicol; Tet, tetracycline; Min, minocycline; Ery, erythromycin. 

^bMIC by broth dilution test. 

^cBacteria were induced with 5 μg of CBAP per ml overnight before MIC determination. 

^dND, not determined.