Should the flies reach the states, the larvae could infest livestock, pets, wildlife and, possibly, even people.

The US stopped livestock imports from northern Mexico due to the screwworm fly threat. USDA Secretary Rollins announced border tightening and a $30M sterile fly program.

A detection of the New World Screwworm closer to the United States will keep the ports closed to livestock from Mexico.

The US has reinstated its livestock import ban from Mexico after the New World screwworm fly was found further north than ...

The U.S. has closed its southern livestock border after detecting a screw-worm case in Mexico, prompting backlash. Mexico’s ...

The new world screw worm attacks animals by burrowing into wounds and feeding on live tissue. Now, with a confirmed case just across the Mexican border, experts here in Texas are on high alert and ...

The map shows the ports of entry affected by the U.S. Agriculture Department’s announcement and the approximate locations of ...

The U.S. Department of Agriculture announced the border closure after Mexico reported a case of a flesh-eating parasite ...