Infection of alveoli (lower airways)

Aetiology

• Viral damage → Bacterial overgrowth→ Pneumonia.

Risk Factors

• Genetic predisposition to Infections:
  • Immunodeficiency, DM etc.
  • MYD88 mutations,
  • IgA deficiency
  • Splenectomy.

Etiologic Types:

• Infective
  • Bacterial, viral, fungal.
• Non Infective
  • Toxins, chemical.

Morphologic types:

• Lobar, Broncho, Interstitial

  

Clinical types