Unit 1: Lung Disease - Pulmoary Tuberculosis

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  • Created by: rosieevie
  • Created on: 16-05-14 10:26
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  • Pulmonary Tuberculosis
    • Infection - M. Tuberculosis
      • Primary Infection
        • Bacteria multiply within upper lungs = lots of oxygen
        • White blood cells attack bacteria and form tubercles
        • Inflammation and enlargement of lymph nodes that drain that area of lungs
        • Few symptoms if any - controlled within weeks
        • Some bacteria  remain in tubercles
      • Post-primary Infection - years later
        • Bacteria may re-emerge - tubercles burst
        • Infection not so easily controlled
        • Bacteria destroy lung tissue = cavities and scar tissue
        • Sufferer coughs up damaged lung tissue, blood and bacteria
        • Without treatment TB spreads to rest of body = fatal
    • Prevention and Treatment
      • Vaccination in children
        • Weakened strain of M. Bovis bacteria = bacteria in cattle TB
      • Antibiotics for 6-9 months
        • Bacteria likely to become resistant
      • Reducing social and economic factors
    • Transmission
      • People with greater risk = hospitals, low immune systems, TB affected countries
      • More widespread in crowded areas with poor hygiene
      • Droplet infection = cough/sneezing
      • Bacteria infects cattle = passed through milk
    • Symptoms - tiredness weight loss, fever, coughing up blood


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