Flesh-eating screwworm confirmed in Texan calf, prompting USDA quarantine

The parasitic New World screwworm, which consumes live flesh, has been detected in a calf in Texas, raising alarms for the U.S. cattle industry. This marks the first confirmed infestation in the United States since 1966.

The discovery in La Pryor, Texas, near the Mexican border, is a major blow to ranchers who have been anticipating such an outbreak as the pest advanced north from Mexico. The U.S. cattle herd is currently at its lowest level in 75 years, and the screwworm could exacerbate tight supplies, leading to further reductions in beef production and record-high prices for consumers.

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Instead of using every available tool, USDA moved too slowly and relied solely on a partial solution that takes years to fully implement.

Texas Agriculture Commissioner Sid Miller criticized the U.S. Department of Agriculture (USDA) for a slow response, stating, "Instead of using every available tool, USDA moved too slowly and relied solely on a partial solution that takes years to fully implement." USDA Secretary Brooke Rollins defended the department's efforts, emphasizing the sterile fly release program as the most effective tool and highlighting significant investment.

The economic stakes are high, with the Texas livestock industry potentially facing up to $1.8 billion in losses if the pest spreads. The USDA has initiated containment protocols, including a quarantine zone around the detection site, the release of sterile flies, increased wildlife surveillance, and deployment of a response team. Traders are already reacting, with feeder cattle futures extending losses amid concerns about reduced beef demand.

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The pest could further shrink the US cattle herd, which is at its lowest level in 75 years.