Methicillin-resistant staphylococcus aureus (MRSA) is a potentially serious infection that resists antibiotics. MRSA can affect the skin, blood, bones, or lungs. A person can either be infected or colonized with MRSA.

There are two types of MRSA infections:

  • Community-acquired—getting the infection outside of a healthcare setting, such as a hospital or clinic
  • Nosocomial—getting the infection while inside a healthcare setting

MRSA can spread several ways:

  • Contaminated surfaces
  • Person-to-person
  • From one area of the body to another

MRSA is caused by specific bacteria that resist antibiotics. Over time, bacteria adapt to repeated exposure to antibiotics, building up a resistance to them.