Gram positive cocci in clusters, Coagulase positive.
Staphylococcus aureus is a ubiquitous organism that colonizes the skin/nares and can cause invasive disease.
MRSA risk factors include:
Health care exposure
Pyogenic skin and soft tissue infection
Infection of prosthetic devices
MSSA - Standard precautions.
MRSA - Requires contact precautions. Add droplet precautions if patient has a cough.