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Infective causes

Authoring team

Infective causes include:

  • bacterial
    • lobar: pneumococcal, Staph. aureus, legionella, Friedlander's
    • lobular (if bilateral is 'bronchopneumonia'): occurs in babies or in the elderly or debilitated patients eg Haemophilus, streptococci
    • generalized bacterial infections eg typhoid fever, plague, brucellosis
  • viral and chlamydial
    • respiratory syncytial
    • influenza (usually secondary bacterial infection)
    • mumps (usually secondary bacterial infection)
    • cytomegalovirus
    • ornithosis
    • upper respiratory tract viruses - rhinovirus, adenovirus, parainfluenza
  • rickettsial
    • Q fever
    • typhus
  • protozoa and parasites
    • pneumocystis carinii
    • toxoplasma
    • amoebae
  • yeasts and fungi
    • candida
    • histoplasma
  • mycoplasma pnemoniae

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