Lecture Notes: Antibiotics and Antibiotic Resistance

Key Topics

• Treatment of diseases using antibiotics
• Antibiotic resistance and its implications
• Prescribing practices of antibiotics
• Limitations of antibiotics against viruses
• Alternative medications: Painkillers

Treatment of Diseases with Antibiotics

• Antibiotics: Medications used to treat bacterial infections.
  • Kill infective bacteria without harming human body cells.
  • Example of bacterial diseases: Salmonella food poisoning, Gonorrhoea.
• Historical Context:
  • Pre-1940s: Many fatalities due to bacterial diseases.
  • 1940s: Discovery of the first antibiotic, Penicillin.
  • Current: Most bacterial diseases are treatable due to antibiotics.

Antibiotic Resistance

• Definition: Condition where bacteria evolve to survive despite antibiotic treatment.
• Causes:
  • Overuse and misuse of antibiotics.
• Consequences:
  • Certain antibiotics becoming ineffective.
  • Potential future difficulty in treating bacterial diseases.
• To be examined in more detail in future content.

Prescribing Practices

• Care in Prescription:
  • Doctors prescribe specific antibiotics for specific bacterial strains.

Limitations of Antibiotics

• Inability to Kill Viruses:
  • Viruses replicate inside human cells, making it difficult to target them without harming body tissues.
  • Antibiotics are not prescribed for viral infections (e.g., certain sore throats).

Alternative Medications

• Painkillers:
  • Used to relieve symptoms by alleviating pain.
  • Do not treat the underlying disease or kill pathogens.

Additional Resources

• Questions and exercises on antibiotics available in the revision workbook.