The US Department of Agriculture has suspended the transport of live cattle, horses and bison through ports of entry along the border with Mexico for at least two weeks. It’s part of an effort to curb the spread of New World screwworm,

Mexico will tighten the flow of cattle from the south of the country to limit the potential spread of the screwworm, the nation's agriculture minister said on Tuesday. The screwworm, which can kill cattle or other hosts within weeks,

The screwworm is a larva of the Cochliomyia hominivorax fly that can invade the tissues of any warm-blooded animal, including humans.