Powassan encephalitis

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Powassan encephalitis
Classification and external resources
ICD-10 A84.8

Powassan encephalitis is a form of arbovirus that results from tick bites.


Symptoms manifest within 7–10 days and include fever, headache, partial paralysis, confusion, nausea and even coma.


There is currently no established treatment.[1]

Half of all cases results in permanent neurological damage and 10-15% result in death.


  1. ^ Hinten SR, Beckett GA, Gensheimer KF, et al. (December 2008). "Increased recognition of Powassan encephalitis in the United States, 1999-2005". Vector Borne Zoonotic Dis. 8 (6): 733–40. doi:10.1089/vbz.2008.0022. PMID 18959500.