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Powassan encephalitis in new brunswick.

W M Fitch, H Artsob

Canadian Family Physician Medecin De Famille Canadien

|January 15, 2011

Summary

This report details a case of Powassan encephalitis in New Brunswick, Canada. The patient recovered significantly but experienced minor memory loss, highlighting the importance of recognizing this rare viral encephalitis.

Area of Science:

Neurology
Infectious Diseases
Public Health

Background:

Powassan encephalitis is a rare, tick-borne viral illness affecting the central nervous system.
Cases are infrequently reported, with limited geographic distribution noted in Canada.

Purpose of the Study:

To report the first case of Powassan encephalitis diagnosed in New Brunswick, Canada.
To describe the clinical presentation, diagnostic considerations, and patient outcome.

Main Methods:

Case report of a 76-year-old male patient diagnosed with viral encephalitis.
Clinical assessment and follow-up of cognitive and physical functioning.

Main Results:

The patient was diagnosed with Powassan encephalitis following a stay in Upper Rexton, New Brunswick.

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Seven months post-onset, significant improvement in cognitive and physical function was observed, with residual minor memory impairment.

This represents the 11th recognized case in Canada and the first documented case in New Brunswick.

Conclusions:

Powassan encephalitis can occur in New Brunswick, underscoring the need for increased awareness among clinicians.
Early recognition and management are crucial for patient recovery, though long-term sequelae like memory impairment may persist.