Maine CDC Health Advisory

July 10, 2023

Arbovirus Update for Healthcare Providers in Maine

The purpose of this health advisory is to alert clinicians to the potential for human arboviral disease activity in Maine and to consider testing for mosquito-borne arboviruses in patients presenting with unexplained encephalitis, meningitis, or high fever (100.4F or 38C) during the summer and fall.

Eastern Equine Encephalitis virus (EEE), West Nile virus (WNV), and Jamestown Canyon virus (JCV) are serious arboviral infections that are transmitted by the bite of an infected mosquito. All three viruses are endemic in Maine. Maine reported zero human cases of mosquito-borne arboviral illness in 2022. Although rare, these diseases can have severe and even fatal consequences for those who contract them.

Advisory (PDF)