II. Epidemiology
- Rare Encephalitis cause in Northeastern and North Central States
III. Pathophysiology
- Tickborne Illness via Woodchuck Tick or Groundhog Tick (Ixodes cookei, I. marxi or I. Scapularis)
IV. Findings
- Presentations range from asymptomatic to severe neurologic Impairment
V. Labs
- Antibody to Powassan Virus (serum, CSF)
VI. Differential Diagnosis
- See Encephalitis
VII. Management
- No known effective treatment
- Supportive care
VIII. Prognosis
- Cognitive Impairment in >50% of survivors, and 10-15% mortality
IX. Resources
- Powassan Virus (CDC)
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Related Studies
Concepts | Disease or Syndrome (T047) |
MSH | D004675 |
SnomedCT | 80110006, 416543004 |
English | Encephalitis, Powassan, POWASSAN ENCEPH, Powassan encephalitis (diagnosis), Powassan tick-borne encephalitis, Powassan viral encephalitis, Powassan Encephalitides, Encephalitides, Powassan, Powassan encephalitis (disorder), Powassan; encephalitis, encephalitis; Powassan, Powassan Encephalitis, Powassan encephalitis, Neuroinvasive Powassan encephalitis virus infection (disorder), Neuroinvasive Powassan encephalitis virus infection |
Portuguese | Encefalite por Vírus Powassan |
Spanish | Encefalitis de Powassan, encefalitis por virus Powassan, encefalitis por virus Powassan (trastorno), infección neuroinvasiva por virus de la encefalitis de Powassan (trastorno), infección neuroinvasiva por virus de la encefalitis de Powassan |
French | Encéphalite de Powassan |
German | Powassan-Enzephalitis |
Italian | Encefalite di Powassan |
Norwegian | Powassan-encefalitt |
Czech | encefalitida Powassan |
Dutch | Powassan; encefalitis, encefalitis; Powassan, Powassan-encefalitis |
Ontology: Powassan virus (C0032859)
Concepts | Virus (T005) |
MSH | D004669 |
SnomedCT | 45838003 |
LNC | LP21134-9 |
Czech | virus Powassan |
Portuguese | Vírus Powassan |
Spanish | Virus Powassan, virus Powassan (organismo), virus Powassan |
German | Powassan-Virus |
French | Virus de Powassan, Virus Powassan, Powassan virus |
English | Flavivirus powassan, Powassan virus (organism), Powassan virus |
Dutch | Powassan-virus |