USDA Confirms New Screwworm Case in Texas, Canada Bans Livestock Imports
The U.S. Department of Agriculture (USDA) has confirmed a second case of the New World screwworm in Texas, specifically in Zavala County. This parasitic fly, whose larvae feed on the living tissue of warm-blooded animals, poses a significant threat to livestock. The USDA's Animal and Plant Health Inspection Service (APHIS) detected the infestation after testing several suspect cases. In response, a quarantine zone has been established around the affected areas to prevent the movement of animals without inspection. The screwworm was initially detected in Mexico in 2024, and efforts have been ongoing to prevent its spread into Texas, a major cattle-producing state. Texas Governor Greg Abbott has expanded a statewide disaster declaration to mobilize resources for combating the outbreak, including the use of sterile flies to disrupt the screwworm's reproductive cycle. Meanwhile, Canada has imposed a temporary ban on livestock imports from Texas to mitigate the risk of the parasite spreading.