The New World screwworm fly was detected in South Texas this week for the first time since 1966 [3].
The discovery of the flesh-eating parasite poses a significant threat to the U.S. livestock sector. If the parasite spreads, it could devastate the U.S. cattle industry, which is valued at approximately $113 billion [1].
Federal officials confirmed the case in Zavala County, specifically near La Pryor, Texas [2]. The location is situated close to the U.S.-Mexico border. The parasite was identified in a calf that was three weeks old [2].
The New World screwworm, known scientifically as Cochliomyia hominivorax, is a parasite that feeds on the living tissue of warm-blooded animals. Because the larvae burrow into the flesh, the infestation can quickly become fatal if left untreated. This detection marks the first time the parasite has been confirmed in Texas in about 60 years [3].
In response to the finding, authorities have established a local quarantine to contain the insect. The U.S. Department of Agriculture is leading the federal response to ensure the parasite does not migrate further into the interior of the country. Officials said they are monitoring the affected area to prevent a wider outbreak among livestock populations [2].
Agricultural experts said rapid containment is necessary to avoid the economic fallout associated with livestock loss, and trade restrictions. The current effort focuses on eradicating the local population of the fly before it can establish a permanent foothold in the region [1].
“The New World screwworm fly was detected in South Texas this week for the first time since 1966”
The reappearance of the New World screwworm after six decades highlights the vulnerability of the U.S. agricultural border. Because the parasite targets living tissue rather than dead wounds, it can cause rapid mortality in young livestock, potentially leading to massive economic losses and disrupting the food supply chain if containment fails.
