How does antibiotic resistance occur?

Bacteria can mutate and this mutation can make them resistant to an antibiotic. Treating this infection then means that only the non-resistant strains of bacteria will be killed. The resistant bacteria will be able to survive and reproduce so the population of the resistant strain increases. The over-prescribing of antibiotics has contributed to the increased development of these resistant strains.

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Answered by Emma R. Biology tutor

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