A flesh-eating parasite that feeds on warm-blooded animals has been detected in the United States for the first time in six decades, raising concerns among ranchers and livestock producers. The US Department of Agriculture (USDA) confirmed that New World Screwworm (NWS) was found in a three-week-old calf in La Pryor, Texas, about 30 miles from the US-Mexico border. The discovery marks the first confirmed case in the country since 1966.