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Case studies of common communicable diseases

Infection and response • Communicable diseases

Key concepts

What you'll likely be quizzed about

  • Measles is a viral infection marked by fever and a characteristic red skin rash.
  • It spreads through inhalation of tiny droplets emitted when an infected person breathes, coughs, or sneezes, making the disease highly infectious.
  • The infection leads to fever and rash due to immune response and tissue involvement.

Flashcards

Test your knowledge with interactive flashcards

Why do pathogens cause specific symptoms?

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The type of pathogen and the tissues they infect determine symptoms through direct damage.

Key notes

Important points to keep in mind

Classify pathogens by type: virus, bacterium, fungus, or protist; type determines replication method and treatment options.

Transmission routes dictate control measures: airborne diseases spread by droplets, foodborne diseases require hygiene, and vector-borne diseases need vector control.

Symptoms indicate affected tissues: respiratory infections cause cough and fever; gut infections invoke vomiting and diarrhoea; plant infections reduce photosynthesis.

Damage to immune cells from HIV reduces resistance to other infections.

Targeting both host and vector is vital in vector life cycles like malaria.

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