- bacterial population = staphlococcus aureus - causes skin infections and lung infections
- when infected, can be treated with Methecilline (antibiotic) - kills the S.A.
- Type of S.A that is killed my Methecilline is the Susceptable form
- Methecilline Susceptable Staphlococcus Aureus (MSSA) = called
- random mutation to the geno of S.A. so when the methecilline was applied, the bacteria did not die. = resistant form
- Methecilline Resistant Staphlococcus Aureus (MRSA)
- increasingly survives -> becomes more common -> serious problem in hospitals because the antibiotic no longer works
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