The first human case of the flesh-eating parasite New World screwworm in the U.S. was confirmed in a traveler who visited Central America, federal officials said Monday. The parasite, known as the New ...

After a decades-long hiatus, new world screwworm populations have surged in Central America and Mexico — and are inching northward.

The New World screwworm is a flesh-eating parasite that lays eggs in open wounds. It can be devastating to livestock and, in rare cases, humans. U.S. Centers for Disease Control and Prevention The ...