What is MRSA?

Methicillin-resistant Staphylococcus aureus (MRSA) is a bacteria responsible for some difficult to treat infections in humans. It may also be referred to as multiple resistant Staphylococcus aureus or oxacillin resistant Staphylococcus aureus (ORSA).

MRSA is a resistant variation of the common bacteria Staphylococcus aureus. It has evolved an ability to survive treatment with beta-lactum antibiotics, including penicillin and methicillin. MRSA is especially troublesome in hospital-acquired (nosocomial) infections. Hospital patients with open wounds and/or weakened immune systems are at greatest risk. MRSA was first discovered in 1961 in the United Kingdom. It is now found worldwide. MRSA is often referred to by the press as a "Super Bug."