Amoxicillin+clavulanic acid is active against the following organisms EXCEPT:
(Ref: KDT 6/e p702, 703) Staphylococcus aureus develops resistance to methicillin by acquiring altered penicillin binding proteins that have low affinity. No b-lactam antibiotic is effective against MRSA. Clavulanic acid is n inhibitor of b-lactamase. It can restore the sensitivity of penicillins against the organisms who have developed penicillinases.