Staphylococcus aureus (MRSA)

Precautions

Contact Precautions
Contact Precautions

General Information

Pathogen information

Gram positive cocci in clusters, coagulase positive

Epidemiology

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

  • Intravenous drug abuse

Can be broadly divided into health-care associated (HA) and community associated (CA).

HA-MRSA is associated with many hospital associated infections ranging from minor/severe skin and soft tissue infections to bloodstream infections and severe pneumonia. It also causes many device associated infection and prosthetic infections.

CA-MRSA is associated with skin and soft tissue infections (e.g. abscesses) and necrotizing pneumonias. However, it can also cause many severe infections as with HA-MRSA.

Associated syndromes

  • Purulent skin and soft tissue infection

  • Musculoskeletal infection

  • Infective endocarditis

  • Infection of prosthetic devices

  • Pneumonia