MRSA - Methicillin-Resistant Staphylococcus aureus 

micrograph of MRSA cells

Key Points:

  • Staphylococcus aureus (or staph) are bacteria commonly found on the skin or in the noses of healthy people.
  • Staph is spread from person to person on contaminated hands, skin, objects and surfaces
  • Staph bacteria causes mostly skin infections, but can cause more serious infections, such as bone, joint, and blood infections.
  • Some staph bacteria are resistant to antibiotics. Methicillin-resistant Staphylococcus aureus (MRSA) is a type of staph that cannot be killed by certain commonly used antibiotics. 
  • Staph infections, including MRSA, occur most frequently in hospitals and healthcare facilities (HA-MRSA) in people with weakened immune systems. MRSA acquired in the community (CA-MRSA) is has been seen most often in groups of people who are in close physical contact with one another such as athletes and military trainees. 


MRSA Infections in the Community Setting (CA-MRSA)

MRSA infections in the community setting (CA-MRSA) are spread primarily through contact with infected people or contact with contaminated items and surfaces.

MRSA Infections in the Healthcare Setting (HA-MRSA)

MRSA acquired in healthcare settings (HA-MRSA) commonly causes serious and potentially life threatening infections, such as bloodstream infections, surgical site infections, or pneumonia.