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Antibiotic resistance means that microorganisms, usually bacteria, will become resistant to drugs that inhibit the growth of antibiotics, bactericidal drugs or bacteria.
All bacteria have genetic variants, some of which are more resistant to the effects of antibiotics than others.
Resistance occurs when these mutations gain from natural selection and become predominant in bacterial strains that occur when antibiotics are used.
If antibiotics are not used unnecessarily, the risk of resistance is reduced if bacteria are not exposed to excessive or short-term doses.
Source: NE
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