Staphylococcus aureus is a germ that lives on the skin and mucous membranes of healthy people. It can grow on the skin or mucous membranes without causing illness (this is called “colonization”). Staphylococcus aureus can also cause infections, most commonly wound infections. When Staphylococcus aureus develops antibiotic resistance, it is called methicillin-resistant Staphylococcus aureus, or MRSA. At St. Joseph’s Continuing Care Centre, we screen patients to detect colonization with MRSA regularly, to help prevent MRSA infections.