The New World screwworm case is the first reported U.S. case​ tied to travel to a country with a current outbreak.

The first human screwworm case in the U.S. has been traced to a person in Maryland who traveled from Guatemala.

“This is the first human case of travel-associated New World screwworm myiasis (parasitic infestation of fly larvae) from an outbreak-affected country identified in the United States,” HHS spokesperson Emily G. Hilliard told NBC News in a statement.