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Within six months of effectively using the antibiotic methicillin to treat s. Aureus infections in a community, all new infections were caused by mrsa; a multidrug resistant s. Aureus. How can this result best be explained?.

Respuesta :

Some drug-resistant microorganisms were present at the outset of treatment, and their frequency grew due to natural selection.

What is a drug-resistant organism?

Bacteria that are resistant to more than one antibiotic are referred to as multidrug-resistant organisms (MDROs for short). Multidrug-resistant organisms are mostly found in hospitals and nursing homes. They frequently affect the elderly or the extremely sick, and they can cause serious infections.

How do microorganisms become drug-resistant?

Microbes may also share genes, particularly those that make the bacterium medication resistant. Bacteria reproduce in billions. Bacteria with drug-resistant DNA may pass these genes on to other bacteria. Non-resistant bacteria absorb the additional DNA and develop antibiotic resistance.

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