Screwworm Outbreak Threatens Texas Cattle
Analysis based on 15 articles · First reported Jun 04, 2026 · Last updated Jun 08, 2026
The re-emergence of the New World screwworm fly in United States — Texas>>> poses a significant economic threat to the $113 billion U.S. cattle industry, potentially leading to billions in losses for ranchers through animal deaths and increased labor and treatment costs. While the United States — United States Department of Agriculture>>> states it's unlikely to damage beef production, the outbreak could exacerbate already record-high beef prices for consumers.
The New World screwworm fly, a flesh-eating parasite, has re-emerged in United States — Texas>>>, United States>>>, for the first time since 1966, threatening the $113 billion U.S. cattle industry. Four cases have been confirmed in calves and a dog across several counties in United States — Texas>>>. The parasite, which lays eggs in open wounds of warm-blooded animals, was detected in Mexico>>> in late 2024 after being contained in Panama>>> for years. The United States — United States Department of Agriculture>>> is implementing a response plan, including dropping sterile flies in south United States — Texas>>> and investing in new fly-breeding facilities in Mexico>>> and United States — Texas>>>. Brooke Rollins>>> closed border entries to livestock to delay the fly's arrival. United States — Texas>>> officials have imposed a quarantine zone and ranchers are taking proactive measures. Climate change is cited as a factor in the spread of this tropical species. While the risk to humans is low, the outbreak could cause significant financial losses for ranchers.
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