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Read the following passage. Give an example of a strain of bacteria that has become resistant to antibiotics.

Some mutations that occur in bacterial pathogens make them resistant to antibiotics. If a patient is prescribed antibiotics and does not complete the entire course, the resistant strains of bacteria survive while the others are killed. The resistant bacteria can then reproduce and spread without competition from the non-resistant strains.

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Answer :

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The strain Staphylococcus aureus, particularly Methicillin-resistant Staphylococcus aureus (MRSA), is a prominent example of bacteria that have developed antibiotic resistance. This resistance often results from not completing antibiotic treatments, allowing resistant bacteria to thrive and spread. Understanding these dynamics is crucial for addressing antibiotic resistance in healthcare.


Explanation:

Antibiotic Resistance in Bacteria

One significant example of a strain of bacteria that has developed resistance to antibiotics is Staphylococcus aureus, specifically the Methicillin-resistant Staphylococcus aureus (MRSA). This strain has become notorious for its ability to withstand treatment with methicillin and other common antibiotics. The mechanism behind this resistance typically involves genetic mutations and the acquisition of resistance genes, which can occur through horizontal gene transfer.

When patients do not complete their prescribed course of antibiotics, as mentioned in the passage, some bacteria can survive and proliferate, leading to the spread of resistant strains like MRSA. Additionally, this resistance can result in infections that are more difficult to treat, posing a significant public health challenge.

Factors Leading to Resistance

  • Incomplete antibiotic courses
  • Overuse of antibiotics in medicine and agriculture
  • Genetic mutations in bacteria

Learn more about antibiotic resistance here:

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