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Encephalitis (cont.)

Encephalitis Symptoms and Signs

The signs and symptoms of encephalitis are the same for adults and children. Infants may have poor feeding, irritability, vomiting, bulging fontanel, and body stiffness; such symptoms in an infant always constitute a medical emergency.

  • Signs and symptoms may last for two to three weeks, are flu-like, and can include one or more of the following which in some individuals may become progressively worse and continue over time:
    • 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
Medically Reviewed by a Doctor on 9/27/2013

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Read What Your Physician is Reading on Medscape

Encephalitis »

Encephalitis, an inflammation of the brain parenchyma, presents as diffuse and/or focal neuropsychological dysfunction.

Read More on Medscape Reference »


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