Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a strain of staph bacteria that’s become resistant to the antibiotics commonly used to treat ordinary staph infections.
Most MRSA infections occur in people who’ve been in hospitals or other health care settings, such as nursing homes and dialysis centers. When it occurs in these settings, it’s known as health care-associated MRSA (HA-MRSA). HA-MRSA infections typically are associated with invasive procedures or devices, such as surgeries, intravenous tubing or artificial joints.
Another type of MRSA infection has occurred in the wider community — among healthy people. This form, community-associated MRSA (CA-MRSA), often begins as a painful skin boil. It’s spread by skin-to-skin contact. At-risk populations include groups such as high school wrestlers, child care workers and people who live in crowded conditions.
via MRSA infection – Diagnosis and Treatment Options at Mayo Clinic.
Staphylococcus aureus, often referred to simply as “staph,” is a type of bacteria commonly carried on the skin or in the nose of healthy people. Sometimes, staph can cause an infection. Staph bacteria are one of the most common causes of skin infections in the United States. Most of these skin infections are minor such as pustules and boils and can be treated without antibiotics. However, staph bacteria also can cause serious infections such as surgical wound infections, bloodstream infections, and pneumonia.
via CDC – MRSA and the Workplace – NIOSH Workplace Safety and Health Topic.