06/05/2026
The first confirmed U.S. case of New World Screwworm was found in a calf in Zavala County, about 100 miles southwest of San Antonio. Texas Parks and Wildlife is working with the Texas Animal Health Commission, USDA and partners statewide to respond.
Early detection is critical and it is important to report suspected infestation in live animals.
Get details on this case and what to watch for at screwworm.gov
Get information on how to report possible cases at tpwd.texas.gov/screwworm
Find a Wildlife Biologist: https://tpwd.texas.gov/landwater/habitat-management/find-a-wildlife-biologist/