TABLE 1.

Characteristics of S. epidermidis study isolates

Yr of isolation	U.S. or Canadian locationa	No. of strains	Source	Studyb
1976-1983	Richmond, Va.	12	Blood-valved	PVE
1973-1975	Winnipegc	5	Blood-valve	PVE
1976-1982	Boston, Mass.	20	Blood-valve	PVE
1976-1980	Birmingham, Ala.	10	Blood-valve	PVE
1998-2001	NE	3	Blood	SCOPE
1998-2001	NW	9	Blood	SCOPE
1998-2001	SW	2	Blood	SCOPE
1998-2001	SE	6	Blood	SCOPE

^aNE, northeastern United States; NW, northwestern United States; SW, southwestern United States; SE, southeastern United States.

^bStudies (reference[s]): PVE (5, 20); SCOPE (10).

^cManitoba, Canada.

^dValve, prosthetic valve.