How did MRSA become resistant to methicillin? mutation in a porin gene acquired a penicillin binding protein that had low

Question

How did MRSA become resistant to methicillin?
mutation in a porin gene
acquired a penicillin binding protein that had low affinity for methicillin
mutation in a drug efflux pump
acquired a beta-lactamase that could destroy penicilin

Kunduz · Accepted Answer

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