Pulmonary Tuberculosis

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  • Created by: hannahx
  • Created on: 04-01-13 18:56
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  • Pulmonary Tuberculosis
    • causes
      • Mycobacterium tuberculosis
      • Mycobacterium bovis
    • symptoms
      • persistent cough, coughing up blood and mucus, chest pains, shortness of breath and fatigue
      • fever and lose weight due to a reduction in appetite
    • course of infection
      • 1. immune system cells build a wall around the bacteria in the lungs
        • forms small, hard lumps known as TUBERCULES
      • 2. Infected tissue within the tubercles dies, the gaseous exchange surface is damaged so tidal volume is decreased
      • 3. Tuberculosis also causes fibrosis, which further reduces the tidal volume
      • 4. If the bacteria enter the bloodstream, they can spread to other parts of the body
    • transmission
      • DROPLET INFECTION - when an infected person coughs or sneezes, tiny droplets or saliva and mucus containing the bacteria are released from their mouth and nose.
        • if an uninfected person breathes in these droplets, the bacteria are passed on
      • tends to be much more widespread in areas where hygiene levels are poor and where people live in crowded conditions
      • can be prevented with the BCG vaccine, and can be treated with antibiotics


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