Flesh-eating screwworm returns to U.S. after 60 years, threatening cattle herd
A flesh-eating parasite that had been kept out of U.S. livestock for decades has been detected in Texas, threatening the nation’s cattle industry and food supply at a time when prices are already hig…
A flesh-eating parasite that had been kept out of U.S. livestock for decades has been detected in Texas, threatening the nation’s cattle industry and
Read Full Story at NBC News →Why This Matters
The reemergence of the flesh-eating screwworm in Texas is more than a localized agricultural crisis—it’s a stark reminder of how fragile food systems become when invasive species breach biosecurity barriers. With cattle prices already near historic highs due to supply chain strains and drought, even a localized outbreak could ripple through meatpacking costs and retail prices, affecting consumers already squeezed by inflation.
Background Context
Eradicated from the U.S. in 1966 through aggressive sterile-male release programs, the screwworm was once a scourge of the livestock industry, costing hundreds of millions in livestock losses before its collapse. The parasite’s return raises questions about whether climate change—expanding the range of tropical pests—or weakened border surveillance has given it new footholds. The last U.S. case before this was in 2016, near the Florida Keys, a reminder that eradication requires perpetual vigilance.
What Happens Next
Expect a rapid federal and state response, including aerial pesticide drops and quarantines, but the window for containment may narrow as temperatures rise, accelerating the parasite’s life cycle. Livestock producers in Texas and neighboring states will face costly preventive measures, while veterinarians may see a surge in cases among wild and domesticated animals. The biggest unknown: whether this is an isolated incident or the start of a resurgence requiring long-term eradication funding.
Bigger Picture
This outbreak fits a troubling pattern of tropical diseases—from citrus greening to dengue—expanding northward as global trade and warming climates erode natural barriers. It also underscores how interconnected livestock and public health are, where a single parasite can threaten both food security and rural economies. As U.S. agriculture grapples with consolidation and labor shortages, such crises test the resilience of an industry already operating on razor-thin margins.
