NEWS RELEASE
For Immediate Release: June 4, 2026
Contact: Sean Hoffmann, Director of Communications, shoffmann@texas-wildlife.org
New Braunfels, TX — On June 3, 2026, state and federal officials confirmed that a case of New World screwworm (NWS) infestation was detected in a bovine calf in Zavala County, approximately 90 miles southwest of San Antonio.
Texas Wildlife Association is committed to continue working with the U.S. Department of Agriculture, Texas Parks and Wildlife Department and Texas Animal Health Commission to share information and updates on NWS awareness, preparedness and reporting requirements regarding this wildlife and livestock threat that has tracked northward from Mexico in recent months.
Texans are reminded to remain vigilant for potential NWS infestations. Spread is often aided by the movement of infested animals, however adult screwworm flies can travel up to 12 miles in search of a host. If a warm-blooded animal (including birds and humans) is observed with maggots in wounds or other body openings (nose, ears, umbilicus, or genitalia), it is imperative to immediately report suspected cases to the Texas Animal Health Commission (livestock) at 1-800-550-8242; Texas Parks and Wildlife Department county biologist (wildlife); a veterinarian (pets); a Texas local public health organization (human).
While an ecological and economic concern, it is important to note that screwworms are not a threat to food safety in the United States.
For more information on NWS in Texas, visit https://www.aphis.usda.gov/node/1050/stop-screwworm.