Episode 350 - New World Screwworm Returns to the U.S.: What Farmers Need to Know - UMN Extension's The Moos Room

A case of New World screwworm was recently identified in a three-month-old calf in Zavala County, Texas, near the Texas-Mexico border. In this episode, Brad breaks down what New World screwworm is, why it matters to livestock producers, and what signs to watch for in cattle and other animals. He explains how the larvae infest live tissue, how the pest spreads, and why early detection, reporting, quarantine, and treatment are key to preventing further spread.

The episode also clears up common myths, including whether screwworm spreads animal-to-animal or person-to-person, whether whole herds must be culled, and whether recovered animals can enter the food supply. Brad also discusses past eradication efforts using sterile flies, current treatment options, and the importance of producer awareness, especially for those in areas at higher risk. 

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