clinical features

Last reviewed 01/2018

Clinical features include:

  • peak rate of infection in autumn and early winter
  • initial influenza-like disease with headache, fever, malaise, myalgia, diarrhoea and fatigue - often develop several days before the onset of respiratory problems; the malaise and fatigue may persist for long after the acute illness
  • cough - initially dry and often insignificant; usually becomes productive with a mucoid and purulent sputum; often paroxysmal, disturbing sleep; may be absent in one-third of cases
  • isolated crackles or areas of wheezing may be heard over one of the lower lobes
  • subsegmental atelectasis and small effusions often detectable in the absence of prominent chest symptoms
  • wide variety of respiratory and non-respiratory complications