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

The parasite — the larvae of the new world screwworm fly — can devastate cattle herds and is rife in parts of Central America.

A rare human case of a flesh-eating parasite known as New World screwworm has been confirmed in a Maryland resident as the Trump administration is trying to prevent the resurgence of an insect largely eradicated from livestock decades ago.