The United States is on alert for a potential case of screwworm, a parasite that feeds on the tissue of animals and, occasionally, humans. Also known as the New World screwworm, its larvae can be deposited in humans, though livestock are the more common vector.

También conocida como lucilia piojera del Nuevo Mundo, logra depositar a veces sus larvas en seres humanos, pero el vector de transmisión acostumbra a ser el ganado