The U.S. Department of Agriculture confirmed three new cases of New World screwworm on Monday, bringing total cases to five and marking the pest's return to U.S. livestock after being declared eradicated in the 1960s. The cases include the first documented infections in dogs and goats, alongside a calf in Texas. This resurgence poses significant risks to the $130 billion livestock industry and rural economies across the southern United States.

Federal and Texas officials are accelerating mitigation efforts, deploying AI-driven monitoring technology and expanding sterile fly production facilities. The sterile insect technique previously eradicated screwworm by releasing irradiated flies that out-competed wild populations. However, current methods require sterilizing both male and female flies, making the process inefficient and costly.

The USDA is pursuing emergency authorization for NovoFly, a genetically engineered male-only strain that could double sterile fly output almost instantly. While promising, this would mark only the third release of genetically modified animals into the wild, following Oxitec mosquitoes and modified pink bollworm. The pest's northward spread through Central America was anticipated, giving officials about a year to prepare containment strategies.

Secretary Rollins emphasized that monitoring efforts successfully delayed the outbreak's timeline. With livestock deaths possible within a week of infection, the agriculture sector faces immediate pressure to prevent wider transmission. The emergency exemption process could fast-track NovoFly deployment, but regulatory approval remains uncertain. Ranchers are being trained to identify early symptoms as the USDA commits to expanding sterile fly production ahead of next spring's critical intervention window.