Description of MRSA Superbug Infection Methicillin-resistant Staphylococcus aureus or MRSA infection (superbug) is now resistant to amoxicillin,methicillin, penicillin, oxacillin, and some other antibiotic types.MRSA superbug is constantly adapting and encourages scientists to work more quickly and efficiently to eliminate this very serious threat. Mrsaskininfection.org~Site InfoWhoisTrace RouteRBL Check