MRSA is resistant to most beta-lactams because it expresses PBP2a encoded by mecA. Which antibiotic is commonly effective against MRSA?

MRSA is resistant to most beta-lactams because it expresses PBP2a encoded by mecA. Which antibiotic is commonly effective against MRSA?

• A. MRSA lacks beta-lactamase enzymes, making penicillins ineffective.
• B. MRSA resistance arises from altered DNA gyrase, making fluoroquinolones ineffective.
• C. MRSA resistance is due to PBP2a encoded by mecA, reducing beta-lactam binding; vancomycin is commonly effective.
• D. MRSA is susceptible to all beta-lactams when used with beta-lactamase inhibitors.

Answer: (C)