The New World screwworm outbreak has officially crossed onto American soil, turning a significant livestock health emergency into a volatile political flashpoint. Since the first detection in Texas on 3 June 2026, the parasitic fly, which infests the living tissue of warm-blooded animals, has become the subject of intense debate in Washington. Trump administration officials are publicly linking the resurgence of the pest to what they characterise as lax enforcement under previous immigration policies, while opponents argue that federal funding cuts have left the country's animal agriculture biosecurity dangerously exposed.
The parasite, which was considered eradicated in the United States since 1966, works by laying eggs in wounds, where the hatching larvae feed on living flesh. The Texas screwworm cases and a confirmed detection in New Mexico have sent shockwaves through the US cattle industry, a sector already bracing for the economic fallout of potential quarantines and increased veterinary costs.
