Amy Murillo and Alec Gerry explain that the New World screwworm is a parasitic fly whose larvae feed on the living tissue of animals, posing a serious threat to livestock, wildlife, pets, and occasionally humans. Although the pest was eradicated from the United States decades ago, a recent case in Texas has raised concerns about its potential spread and economic impact, particularly on the cattle and dairy industries. They note that the primary response strategy is the release of sterile male flies, which help reduce reproduction because female screwworm flies typically mate only once. Additional; measures such as animal inspections, quarantines, surveillance, and treatment of infected animals are also being used to contain the outbreak. Murillo and Gerry stress that early detection and prompt reporting of suspected cases are essential to preventing the screwworm from becoming reestablished in the United States.