Texas Screwworm Outbreak Expands
Analysis based on 190 articles · First reported Apr 20, 2026 · Last updated Jun 16, 2026
The screwworm outbreak in United States — Texas poses a significant threat to the U.S. cattle industry, potentially causing billions in economic damage and further increasing already high beef prices due to reduced cattle supply. International trade has been disrupted, with Canada and Mexico implementing import restrictions on livestock from affected areas. The market is closely watching the effectiveness of eradication efforts by the United States — United States Department of Agriculture and United States — Texas.
The New World screwworm, a flesh-eating parasite, has re-emerged in the United States, with multiple confirmed cases in United States — Texas and one in Mexico. This marks the first significant outbreak in decades, posing a severe threat to the nation's $113 billion cattle industry and wildlife. The United States — United States Department of Agriculture (USDA) and United States — Texas officials are implementing extensive measures, including quarantine zones, increased surveillance, and the release of sterile flies to disrupt the parasite's reproduction cycle. U.S. Agriculture Secretary Brooke Rollins has announced a billion-dollar response plan, including funding for new sterile fly production facilities in United States — Texas and Mexico. However, the response has faced criticism from some United States — Texas officials, like Sidney Miller, for being too slow. The outbreak has also led to international trade disruptions, with Canada temporarily banning livestock imports from United States — Texas and Mexico suspending imports from the U.S. The re-emergence of screwworm is attributed to its northward spread from Central America and Mexico, with climate change and past border policies cited as contributing factors. The long-term solution involves increasing sterile fly production and international cooperation to push the pest back to its containment zone in Panama.
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