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Texas Declares Disaster as Resistant Screwworm Threatens Livestock and Wildlife

  //health-fitness.news-articles.net/content/2026/ .. -screwworm-threatens-livestock-and-wildlife.html
  Published in Health and Fitness on Tuesday, March 24th 2026 at 17:43 GMT by Houston Public Media
      Locales: UNITED STATES, MEXICO

Austin, Texas - March 24th, 2026 - Texas Governor Greg Abbott today issued a state of disaster declaration in response to the accelerating northward migration of a new, highly resistant strain of the New World screwworm. The declaration empowers the state to rapidly deploy resources and implement preventative measures to safeguard Texas's vital livestock and wildlife industries, facing a potential ecological and economic crisis not seen since the 1950s.

The screwworm, Cochliomyia hominivorax, is a parasitic fly larva that infests living mammals, causing painful, debilitating, and often fatal wounds. While successfully eradicated from the United States through a decades-long, collaborative initiative spearheaded by the USDA, recent outbreaks in Mexico have introduced a new wrinkle: a strain demonstrating increasing resistance to traditional control methods. This resistance, coupled with a changing climate and increased cross-border animal movement, has dramatically increased the risk of re-establishment within Texas.

"This is not merely a livestock issue; it's an ecological security issue," Governor Abbott stated in a press conference this afternoon. "The potential for widespread infection threatens not only the livelihoods of our ranchers but the health of our native wildlife, including iconic species like white-tailed deer, which are crucial to our state's identity and economy. We are committed to deploying every available resource to shield Texas from this devastating parasite."

The Texas Animal Health Commission (TAHC) is at the forefront of the state's response, working in close coordination with the United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS), and counterparts in Mexico. Dr. Andy Dill, TAHC's State Veterinarian, emphasized the urgency of the situation. "We've learned from the past. Early detection and rapid response are absolutely critical. This new strain's resistance necessitates a multifaceted approach, moving beyond the methods that proved successful in the past."

That multifaceted approach includes significantly enhanced surveillance efforts, focusing on areas along the border and expanding outwards. TAHC is deploying additional personnel and utilizing advanced technologies, including drone-based thermal imaging, to identify potential infestations in livestock and wildlife. Increased inspection protocols are being implemented at ports of entry for animals and animal products, and a robust public awareness campaign is educating Texans about the symptoms of screwworm - open wounds teeming with larvae - and the importance of immediate reporting.

Beyond surveillance, the state is preparing for the possibility of strict quarantine measures. Areas identified as high-risk may be subjected to movement restrictions on livestock and other susceptible animals to prevent the spread of the infestation. Ranchers are urged to implement rigorous preventative measures, including regular inspection of animals, wound care, and the use of approved insecticides.

However, experts acknowledge that controlling this resistant strain will be far more complex than previous eradication efforts. The original program relied heavily on the Sterile Insect Technique (SIT), where millions of sterile male flies were released to mate with wild females, preventing viable offspring. While SIT remains a key component of the strategy, its effectiveness is being diminished by the evolving resistance. Researchers are exploring supplementary control methods, including novel insecticidal treatments and biological control agents.

The economic stakes are high. A widespread screwworm outbreak could cripple the Texas livestock industry, valued at billions of dollars annually. Losses would extend beyond direct animal deaths to include reduced weight gain, decreased milk production, and increased veterinary costs. The impact on wildlife populations could be equally devastating, with potentially cascading effects on the entire ecosystem. Furthermore, the re-emergence of screwworm could jeopardize Texas's ability to export livestock products, impacting international trade relations.

The situation is also raising questions about the efficacy of border control and biosecurity measures. Critics point to the increasing frequency of cross-border animal movement, both legal and illegal, as a contributing factor to the spread of the screwworm. Increased funding for border security and enhanced collaboration between U.S. and Mexican authorities will be crucial to preventing future outbreaks. The state is urging a renewed commitment from the federal government for support.

For ranchers and landowners, the message is clear: vigilance is paramount. Report any suspected cases of screwworm to the TAHC immediately. The future of Texas agriculture and wildlife depends on a swift and coordinated response.