Maine CDC Health Advisory
June 19, 2020
Hepatitis A Increase in Maine
Maine has seen an increase in hepatitis A cases in Penobscot, Somerset, and York counties over the past four months, with the number of reported cases climbing from zero in January and February to 13 in Penobscot, 7 in Somerset, and 6 in York counties in March through today. Twenty-one of the 26 cases had risk factors of injection drug use or housing insecurity.
Historically Maine had 7 to 10 cases of hepatitis A per year over the past decade. In 2019, Maine CDC identified 45 cases. This increase was driven by a restaurant-associated outbreak and cases related to injection drug use or homelessness. Since January 1, 2020, Maine CDC has identified 39 cases of hepatitis A. Recent case investigations, however, have not identified a source of the infections. The increase of hepatitis A in Maine mirrors an increase of cases seen across the country.