Full Breakdown
New World Screwworm Resurges in Texas: Cases, Response, and Economic Stakes
6/9/2026, 8:35:58 PM
Core Outbreak Details
The U.S. Department of Agriculture (USDA) confirmed a total of four New World screwworm detections in Texas — calves in Zavala, La Salle and Gillespie counties and a dog in Andrews County — and one additional case in Lea County, New Mexico. The parasite is a flesh-eating fly larva that deposits eggs in open wounds of warm-blooded animals. Female flies mate only once; sterile-male releases are intended to block reproduction.
Background & Context
Screwworm was eradicated from the United States in the 1960s after a massive sterile-fly program. Since 2023 the pest has moved north through Central America and Mexico, reaching the U.S. border in late 2024. The USDA closed the southern border to cattle imports in 2025 and began expanding sterile-fly production in Panama, Mexico, and a new Texas facility.
Key Actors & Organizations
- Brooke Rollins, USDA Secretary – leads the federal response and announced a >$1 billion investment in eradication tools.
- Dudley Hoskins, USDA Under Secretary for Marketing & Regulatory Programs – coordinates on-the-ground operations.
- Greg Abbott, Texas Governor – activated a statewide disaster declaration and mobilized state resources.
- John Bellinger, senior USDA advisor for screwworm preparedness – former Texas A&M regent and cattle-industry executive.
- Sid Miller, Texas Agriculture Commissioner – critic of the federal plan, advocating a poison-bait approach.
- Edward Burgess, University of Florida entomologist – provides scientific context on sterile-fly timelines.
Timeline of Confirmed Cases
- June 3, 2026 – First U.S. case: 3-week-old calf in Zavala County, Texas.
- June 5, 2026 – Second calf confirmed in Zavala County, a few miles from the first.
- June 8, 2026 – USDA announces three new detections: calf in La Salle County, goat in Gillespie County, and dog (initially reported in Texas, later re-classified to New Mexico).
- June 9-10, 2026 – USDA holds a press briefing; sterile-fly releases from Moore Air Base begin.
Data & Statistics
- Confirmed detections: 4 in Texas, 1 in New Mexico (some outlets report 5 total).
- USDA projects up to $1.8 billion in potential losses for Texas if the pest becomes established.
- Beef prices are already near record highs, up roughly 75 % since Dec 2020.
- Sterile-fly output: 130 million flies released since Jan 2026; target 300 million flies / week once the Edinburg plant reaches full capacity (planned 2027).
- Response personnel: 75 ground staff plus hundreds of laboratory, logistics and outreach staff.
- Trade impact: Canada imposed a temporary ban on Texas livestock; several U.S. states tightened import requirements.
Why It Matters
The pest threatens the nation’s largest cattle-producing state, jeopardizing herd health, hide quality, and market supply. A full-scale outbreak could exacerbate already tight beef supplies, drive prices higher, and trigger broader interstate and international trade restrictions.
Official Statements & Responses
- Rollins pledged accelerated sterile-fly production, a new Texas factory, and “real-time” federal action to push the pest back beyond the Darien Gap.
- Hoskins emphasized simultaneous eradication efforts and urged animal owners to report any suspicious wounds.
- Abbott declared a disaster, activated state resources, and warned the screwworm “can spread like wildfire.”
- Bellinger said his role will focus on expanding testing, detection, and sterile-fly deployment.
- Miller argued the USDA response is too slow, promoted a poison-bait system, and warned that current quarantine measures could cripple the cattle industry.
- Burgess noted that the sterile-fly solution will not be ready for several months, underscoring the need for interim measures.
Criticism & Opposition
Sid Miller contended that the federal plan “will take too long” and suggested a poison bait that could affect non-target species. Forbes quoted Miller urging President Trump to “throw every available federal resource at this threat.”
Conflicting Reports & Gaps
- Case count: AP and PBS report 4 Texas cases; Bloomberg and NY Times cite 5 total detections.
- Dog location: Initially listed as a Texas case, later re-classified to Lea County, New Mexico.
- Facility timeline: Rollins mentioned a 2027 target; Abbott pushed for completion by May 2027; other sources cite a November 2027 opening.
- Sterile-fly production goals vary from 8 million flies / week (early 2026) to a projected 300 million / week at full capacity.
Verbatim Quotes
- “When that first case is seen, everyone is being vigilant and their eyes are on it more intensely,” — Edward Burgess, University of Florida entomologist
- “We need the partnership of animal owners across the region – please stay vigilant, check your animals closely, and report anything that looks suspicious.” — Dudley Hoskins, USDA Under Secretary
- “We have defeated this pest before, and we will do it again.” — Greg Abbott, Texas Governor
- “What the hell is a good fly?” — Sid Miller, Texas Agriculture Commissioner
- “USDA is responding in real time and building up long term capabilities to push back New World Screwworm beyond our borders and past the Darien Gap,” — John Bellinger, USDA Senior Advisor
- “ If unchecked, a New World Screwworm outbreak could have devastating economic consequences for Texas, thetop cattle-producing statein the country.” — Russell Boening, Texas Farm Bureau President
What’s Next
The Edinburg sterile-fly plant is slated to reach full output by 2027, with interim releases continuing from Moore Air Base. USDA is evaluating an emergency authorization for a genetically engineered sterile strain and expanding border-inspection teams. State and federal agencies will maintain 20-km quarantine zones, increase wildlife trapping, and monitor trade partners for additional restrictions.
