USDA confirms first case of New World screwworm in cattle in six decades, posing threat to livestock industry A flesh-eating parasite rarely seen in the US in six decades has been found in a calf in Texas, agriculture officials said, in an alarming development for the country’s cattle industry. The New World screwworm fly ( NWS ) was confirmed in the animal in the south of the state, about 50 miles from the Mexico border, Brooke Rollins, the agriculture secretary, said late on Wednesday. Continue reading...