The New World screwworm, a flesh-eating fly previously eradicated in the U.S., has been detected in Texas, specifically in a 3-week-old calf. This marks the first confirmed case in decades and raises concerns about the potential for re-establishment of the parasite in the U.S. Authorities, including the U.S. Department of Agriculture (USDA), have responded by creating a quarantine zone approximately 12 miles wide around the McAllen Ranch, where the case was identified. Increased surveillance and rapid treatment are underway to prevent further spread, which could impact livestock and the broader food supply. The screwworm poses a threat to any warm-blooded animal, including pets and humans, although the risk to people is low. Experts have noted that while the situation is serious, there is no need for panic. The USDA has previously eradicated the screwworm through a sterilization program and has the means to manage the current outbreak. Climate change and increased travel are cited as factors contributing to the parasite's return. Vigilance and awareness are crucial, and the public is encouraged to report any suspected cases.