06/08/2026
Two confirmed cases of New World Screwworm have been reported in two different calves, both in Zavala County near the Texas-Mexico border.
First, Texans should know what this, and what it is not. New World Screwworm (NWS) is an animal health issue, not a food safety issue. It does not infest meat, fruits or vegetables. Federal officials and state experts have made clear that our food supply remains safe. Beef and other food products remain safe for consumers.
Nevertheless, it’s important to protect livestock and other animals. That’s why action has been taken to establish a quarantine zone, restrict animal movement in Zavala County and continue deploying sterile flies in strategic areas.
This is the same proven screwworm eradication strategy that successfully eliminated this pest from the United States decades ago.
Ranchers and livestock owners can help by checking animals regularly for wounds (like I’m doing with my own cattle in West Texas), treating injuries promptly, reducing fly exposure, and immediately reporting any suspected infestations. Early detection is critical to combating the NWS.
Pet owners should also remain vigilant. Dogs, cats, and other animals with untreated wounds can be vulnerable. Keeping wounds clean, treating them promptly, and monitoring animals closely can help protect both pets and livestock.
If you suspect a case of New World Screwworm, contact the Texas Animal Health Commission’s 24/7 Veterinary Line at (800) 550-8242.
Texas has faced this challenge before. With vigilance, early reporting, and a coordinated response, we can contain this outbreak and protect our livestock, pets, and the Texas economy.
I appreciate the work being done by fellow ranchers, veterinarians, the Texas Animal Health Commission, USDA, the Texas Division of Emergency Management, Texas A&M AgriLife, and other officials who are working around the clock to keep this pest from gaining a foothold in Texas.
I also want to thank Governor Abbott and Speaker Burrows for directing state resources toward this response and helping ensure Texas remains prepared to meet this challenge head-on.