20/05/2013 by admin | Respiratory


Belongs to orthomyxovirus group and exists in two main forms, A and B (e.g. influenza A)

Human immunity develops against the haemagglutinin antigen and the neuraminidase antigen on the viral surface (e.g. H1N1 = swine flu)


  1. Incubation period is usually 1-3 days.
  2. Illness starts with fever, shivering and generalised aching of the limbs.
  3. Associated severe headache, soreness of throat and persistent dry cough that can last several weeks.



  1. Secondary bacterial infection, particularly Strep.pneumoniae and H.influenzae (causative agents of CAP).



  1. Bed rest and paracetamol.
  2. Antibiotics in people with chronic bronchitis, heart or renal disease (‘at risk’ pts). 
VN:F [1.9.22_1171]
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