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Adaptation and selection

Antibiotics are chemicals that weaken bacterial cell walls. They bring
about osmotic lysis. Bacterial cells are no longer restrained by a strong
cell wall, they swell & burst. Viruses have different covering and are
therefore unaffected by antibiotics.

Mutations are changes in DNA that result in different…

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giving them resistance to many antibiotic. These are called super bugs
an example is MRSA.

Aiding resistance :
There are 2 main events that give rise to this:
1. more mutations and conjugations can occur.
2. Incompletion of a course of antibiotics... the more resistant
bacteria remain and increase…


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