June 30, 2023

Locally Acquired Malaria Cases Identified in the United States

Please review this helpful information about domestic acquisition of malaria in the U.S. in recent months, risks of acquisition of malaria in the U.S. with increased international travel, and the need to plan for testing and treatment of patients with malaria.

In Maine, Anopheles mosquito vectors are present. While the risk in Maine remains low, it is possible for local mosquitoes to acquire Plasmodium spp. parasites from an infected person and transmit the parasite to a susceptible, non-infected person. Providers should encourage confirmed and suspected patients with malaria to avoid activities that would put them in contact with local mosquitoes.

The above average rainfall in the previous weeks increases the chance of a potentially more robust mosquito season. Providers should remain vigilant throughout the year for potential cases. All confirmed and suspected patients with malaria must be reported to Maine CDC by electronic laboratory reporting, fax at 800-293-7534, or by phone at 800-821-5821.

Advisory (PDF)