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.

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

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

A group of canines are training to detect the smell of screwworm, a flesh-eating pest that has infected Mexico's cattle herd and disrupted livestock trade with the United States, offering a glimmer of ...

The United States has temporarily closed its southern border to livestock imports due to the northward spread of the New World screwworm fly in Mexico, a flesh-eating parasite posing a significant ...