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
Antimicrobial use
Incarceration
IDU
Shared equipment
Others
Pyogenic skin and soft tissue infection
MSK infection
Endocarditis
Abscess
Pneumonia
Infection of prosthetic devices
Others