What are the signs and symptoms of avian influenza?

Updated: Feb 12, 2020
  • Author: Nicholas John Bennett, MBBCh, PhD, MA(Cantab), FAAP; Chief Editor: Michael Stuart Bronze, MD  more...
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Respiratory symptoms are the most common presentation. More severe respiratory distress occurs around 5 days from the initial symptoms. The sputum is sometimes bloody.

Other symptoms include the following:

  • Fever (temperature >38°C)
  • Diarrhea (watery, nonbloody) (possibly a poor prognostic sign)
  • Vomiting
  • Chest and/or abdominal pain
  • Encephalitis (Two persons in Vietnam presented with encephalitis only. [14] )

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