Monday, October 10, 2011

3.33 - Antibiotic Resistance



- 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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