The New World screwworm has returned to the U.S. Now what?

Flesh-eating, hooked-mouth maggots have wriggled their way back into the United States. As of June 21, 15 cases of New World screwworm have been confirmed in Texas and New Mexico in cows, goats, sheep and even a dog. 

The screwworm (Cochliomyia hominivorax) threatens the…