Screwworm Outbreak Confirmed in Southern Texas, Livestock Quarantine Imposed
Brownsville, Texas - April 1, 2025 - The United States Department of Agriculture has confirmed a new outbreak of the New World screwworm in southern Texas, triggering an immediate livestock quarantine across three counties. What began as a routine inspection on a private ranch in Cameron County led to the discovery of the parasitic fly larvae in a wound on a domestic goat, marking the first confirmed infestation in the state since the species was eradicated from the United States in 1982. Why has this insect re-emerged? Officials point to increased cross-border movement of stray animals from Mexico, where a concurrent outbreak has been reported. The USDA has deployed response teams to establish checkpoints, restrict animal transports, and release sterilized screwworm flies. When will the quarantine lift? Authorities have not provided a timeline, noting that eradication will require sustained surveillance. How can livestock owners protect their animals? By immediately reporting any wounds with maggots to state veterinarians and submitting samples for laboratory analysis to prevent further spread. The USDA warns that without swift action, the screwworm could cost the domestic livestock industry billions.