What Is Powassan?
In this Article
How It Spreads
Symptoms
Diagnosis
Treatment
Prevention
Powassan is a rare tick-borne disease caused by a virus. It can cause swelling in the brain (doctors call this encephalitis) and in the membranes around the brain and spinal cord (you may hear this called meningitis).
Only about 75 cases were reported in the U.S. over the last 10 years. Yet experts warn the disease could start to spread faster now that it's transmitted by the deer tick -- the same tick that spreads Lyme disease.
http://www.webmd.com/brain/what-is-powassan#1
