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A member asked:
How is it that mrsa become resistant to antibiotics?
2 doctors weighed in across 2 answers
Darwin: Darwin would have predicted this. Everytime antibiotics are used, a very few number of bacteria survive because they had some random mutation that gave them an advantage. Eventually, these resistant strains become common and give us things like mrsa. As we continue to overuse antibiotics, more of this will occur.
Answered 3/24/2013
5.2k views
DNA: The bacteria developed resistance to methicillin a long time ago and through subsequent generations has changed its dna to keep the resistance.
Answered 3/29/2013
5.2k views
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