Methicillin-resistant staphylococcus aureus, more commonly known as MRSA, is a type of bacteria that can cause a serious infection.

Methicillin-resistant Staphylococcus aureus, also called MRSA or antibiotic staff infection, may cause a variety of symptoms when pneumonia--a secondary infection--develops.

Methicillin-resistant Staphylococcus aureus, or MRSA, remains a major public health threat in the United States. Under growing pressure, hospitals--the major source of MRSA infections--have introduced stringent hygiene procedures to slow its spread.