Anaplasmosis is a disease caused by the bacteria Anaplasma phagocytophilum which infects white blood cells (neutrophils). Anaplasma was previously known as human granulocytic ehrlichiosis (HGE) or human granulocytic anaplasmosis (HGA). Signs and symptoms of anaplasmosis include: fever, headache, malaise, and body aches. Encephalitis/ meningitis may occur but is rare. Anaplasmosis is transmitted to a person through the bite of an infected deer tick (Ixodes scapularis).

Anaplamsa cases appear to be increasing in Maine as the vector (the deer tick) is found throughout the state. Anaplasma is treatable, and is best prevented by avoiding exposure to ticks.

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Resources for Maine Residents

Surveillance Reports

Other Vector-borne Diseases