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Lower Respiratory Disease
Lower Respiratory Disease

Community-Acquired Pneumonia



  • Chest X-Ray Signs of Pneumonia

  • Pulmonary consolidation without volume loss - may be lobar (lobar pneumonia) or multifocal
  • Air bronchograms - tubular outlines of the smaller airways
  • Silhouette signs - obliteration of normally clear outlines between lung fields and adjacent structures
  • Classification

  • Community-acquired pneumonia
  • Hospital-acquired pneumonia
  • Ventilator-associated pneumonia
  • Causes of Pneumonia

  • Bacteria - Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, Staph aureus, Mycoplasma, Legionella, Chlamydia
  • Viruses - influenza, parainfluenza, human metapneumovirus, RSV
  • Fungi - Pneumocystis, aspergillosis
  • Examples

  • Left lower zone pneumonia
  • Left lower zone pneumonia
  • Right middle lobe pneumonia - PA film
  • Right middle lobe pneumonia - PA film
  • Right middle lobe pneumonia - lateral film
  • Right middle lobe pneumonia - lateral film
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