Tags: Bacteria.
Methicillin-resistant Staphylococcus aureus (MRSA) is a bacterium responsible for several difficult-to-treat infections in humans. It is also called oxacillin-resistant Staphylococcus aureus (ORSA). MRSA is any strain of Staphylococcus aureus that has developed through the process of natural selection resistance to beta-lactam antibiotics which include the penicillins (methicillin dicloxacillin nafcillin oxacillin etc.) and the cephalosporins.
