An American who traveled to El Salvador has been diagnosed with New World screwworm, marking the first known case of the disease in the U.S. in a long time. According to the Associated Press, the disease was contracted by a Maryland resident who has since recovered.

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

A notorious flesh-eating parasite has been detected in a US patient for the first time in decades, health officials say. Maryland health authorities and the Centers for Disease Control and Prevention (CDC) are investigating a travel-associated infection in a person who recently arrived from El