How do the signs and symptoms of encephalitis vary by specific type?

Updated: Aug 07, 2018
  • Author: David S Howes, MD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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The viral prodrome typically consists of fever, headache, nausea and vomiting, lethargy, and myalgias. Manifestations associated with specific types of encephalitis include the following:

  • Encephalitis caused by varicella-zoster virus (VZV), Epstein-Barr virus (EBV), cytomegalovirus (CMV), measles virus, or mumps virus: Rash, lymphadenopathy, hepatosplenomegaly, and parotid enlargement

  • St Louis encephalitis: Dysuria and pyuria

  • West Nile encephalitis (WNE): Extreme lethargy

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