Gram ⊕, catalase ⊕, coagulase ⊝, urease ⊕ cocci in clusters.- Novobiocin sensitive.- Does not ferment mannitol (vs S aureus).- Normal flora of skin; contaminates blood cultures.

- Infects prosthetic devices (eg, hip implant, heart valve) and IV catheters by producing adherent biofilms.