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Understanding antibiotics, resistance and symptom medicines

Infection and response • Communicable diseases

Key concepts

What you'll likely be quizzed about

  • Antibiotics are medicines that kill bacteria or prevent their growth by targeting specific bacterial structures.
  • For instance, penicillin works by weakening bacterial cell walls, causing them to burst due to osmotic pressure, resulting in bacterial death.
  • The discovery of penicillin revolutionized medical treatments and has saved countless lives by eliminating bacterial infections.

Flashcards

Test your knowledge with interactive flashcards

What role do plasmids play in resistance?

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Plasmids can carry resistance genes and transfer between bacteria, promoting the spread of resistance.

Key notes

Important points to keep in mind

Antibiotics target bacterial features; they do not affect viruses.

Specific antibiotics suit specific bacteria; testing guides the choice.

Resistance arises by mutation or gene transfer (plasmids).

Overuse accelerates resistance; stricter prescribing reduces risk.

Completing antibiotic courses reduces survival of resistant bacteria.

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