<prompt> True about methicillin-resistant staphylococcus aureus MRSA -a Isoxazolyl penicillin is highly effectiveb All MRSA are multidrug resistantc Vancomyin is effectived MRSA are more virulent than sensitive strainse Resistance develop due to altered binding proteinbcdeabdabcdacde  <response>: Methicillin resistance staphyloccus aureus MRSA MRSA is a bacterium responsible for several difficult to treat infections in humans.It may also be referred to as multidrug resistant staphyloccus aureus or oxacillin resistant staphylococcus aureus ORSAMRSA is by definition any strain of staphyloccus aureus that is resistant to a β-lactams including penicillin, methicillin, cloxacillin, nafcillin and oxacillin, cephalosporin.Resistance develops due to alteration in transpeptidase penicillin binding protein on which all β-lactam antibiotic act So, MRSA is resistant to all β-lactam antibiotics.MRSA especially community acquired MRSA; CA-MRSA display enhanced virulence, spreading more rapidly and causing disease much more severe than traditional staphylocccus aureus.Vancomycin is the DOC for MRSA. 