Texas is facing a renewed threat from the New World screwworm, a parasitic fly whose larvae consume live flesh. Two new cases, confirmed Monday by the U.S. Department of Agriculture (USDA), bring the total to four in the state. The infections were found in a calf in La Salle County and a dog in Andrews County, hundreds of miles apart, following earlier discoveries in young calves. This resurgence of the pest, previously eradicated from the U.S. in the 1960s, poses a significant risk to the nation's cattle industry. The USDA is employing a strategy of releasing sterile male flies to mate with wild females, thereby preventing reproduction and halting outbreaks. Efforts are underway to increase sterile fly production and construct a new fly factory in Texas, with USDA Secretary Brooke Rollins set to receive a briefing on the situation.