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Encephalitis Symptoms

The signs and symptoms of encephalitis are the same for adults and children.

• Signs and symptoms may last for 2-3 weeks, are flu-like, and can include 1 or more of the following:
  
  
  • Fever
    
    
  • Fatigue
    
    
  • Sore throat
    
    
  • Stiff neck and back
    
    
  • Vomiting
    
    
  • Headache
    
    
  • Confusion
    
    
  • Irritability
    
    
  • Unsteady gait
    
    
  • Drowsiness
    
    
  • Visual sensitivity to light

• More severe cases may involve these signs and symptoms:
  
  
  • Seizures
    
    
  • Muscle weakness
    
    
  • Paralysis
    
    
  • Memory loss
    
    
  • Sudden impaired judgment
    
    
  • Poor responsiveness