The US Department of Agriculture (USDA) on Monday said two additional cases of New World screwworm were detected in Texas days after authorities discovered the flesh-eating parasite returned to the Lone Star State for the first time in decades. One reported case of an infested calf occurred in La Salle County, Texas while another case...

Two more cases of the New World screwworm have been confirmed hundreds of miles apart in Texas, demonstrating the difficulty of stopping the spread of a pest that could potentially devastate the nation's cattle industry.