Authorities in the United States confirm the New World screwworm has reappeared in Texas, including a second case near the Mexico border, days after an initial detection in a calf. Multiple outlets report that USDA-led efforts are underway to slow and contain spread, with federal and state agencies deploying response teams and measures such as releasing sterile flies to disrupt the pest’s life cycle. Texas Governor Greg Abbott is reported to have issued a disaster declaration as officials coordinate with the federal government.

The parasite is described as capable of causing severe harm to livestock because its larvae infest wounds and feed on living tissue. Several reports say this is the first time in decades the screwworm has threatened the U.S. cattle industry, raising concern about potential impacts on beef production. Additional confirmed cases include one beyond the main Texas cluster, indicating officials face challenges in stopping a mobile insect pest once it emerges. Reporting also notes uncertainty about how far the outbreak could spread and whether other cattle-producing states could be at risk.