Live Tracker · Updated June 3, 2026
Texas Screwworm Tracker
The go-to source for Texas landowners, ranchers, and hunters monitoring the New World screwworm situation. Status checked and updated twice daily.
Texas Status
Suspected Case — Under Investigation
0 confirmed · 1 suspected
Closest Confirmed Detection
25 mi
Coahuila, Mexico · south of Texas border (confirmed)
Risk Level
Critical
For South Texas landowners
Last Updated
June 3, 2026
Checked twice daily
🚨 Breaking — Latest Coverage
Updated hourlySouth Texas — county not yet disclosed · Lab confirmation pending.
Commissioner Miller: First Suspected New World Screwworm Case in Texas Demands Use of All Available Tools to End Threat - fox34.com
fox34.com · Jun 3, 2026
First suspected New World screwworm case detected in South Texas - Houston Public Media
Houston Public Media · Jun 3, 2026
First suspected New World screwworm case detected in South Texas - KERA News
KERA News · Jun 3, 2026
Possible New World screwworm detected in Texas, USDA confirms testing underway - Brownfield Ag News
Brownfield Ag News · Jun 3, 2026
⚠ TAHC High-Risk Texas Counties
The Texas Animal Health Commission has designated these counties as high-risk. Enhanced livestock monitoring and movement restrictions may apply.
Source: Texas Animal Health Commission · www.tahc.texas.gov
Official Agency Resources
The authoritative sources on screwworm in Texas. Go here for confirmed case data, movement restrictions, and official guidance.
USDA APHIS
Stop Screwworm — Official USDA Response Page
The federal government's primary screwworm resource. Current status, sterile fly program updates, detection data, and guidance for livestock producers.
screwworm.gov redirects here
Texas Animal Health Commission
New World Screwworm Emergency Response — TAHC
Texas state authority for livestock. High-risk county designations, movement restrictions, producer guidance, and the TAHC sterile fly facility announcement.
Last updated Feb 9, 2026 — check for newer updates
Always verify critical information directly with official agencies before making livestock management or transport decisions.
Northward Spread Timeline
June 3, 2026
South Texas — First Suspected U.S. Case
USDA reports the first suspected New World screwworm case in South Texas, marking a potential breach into U.S. territory. Laboratory confirmation pending. TAHC and USDA response teams mobilized. Texas landowners in high-risk border counties should inspect all livestock immediately.
June 2026
Coahuila, Mexico — ~25 miles from Texas border
USDA reports confirmed detections in Coahuila, Mexico, the closest yet to the Texas border. TAHC designates six high-risk Texas border counties.
May 2026
Coahuila, Mexico — ~31 miles from Texas border
Confirmed detections move northward into Coahuila. USDA expands sterile fly release zones along the Texas border.
Late 2025
Northern Mexico — Nuevo León and Tamaulipas
Screwworm spreads into northeastern Mexican states bordering Texas. USDA and TAHC begin enhanced surveillance programs.
Mid 2025
Central/Northern Mexico — rapid northward spread
Detections continue northward from Veracruz and Oaxaca into central Mexico. USDA intensifies sterile fly programs.
Early 2025
Southern/Central Mexico — Veracruz, Oaxaca
Screwworm spreads into southern Mexican states after breaking through the containment barrier in Central America.
Late 2024
Chiapas, Mexico — first detection in Mexico
New World screwworm detected in Chiapas, Mexico after breaching the USDA/Mexico sterile fly barrier in Central America.
Latest News
Updated hourlyCommissioner Miller: First Suspected New World Screwworm Case in Texas Demands Use of All Available Tools to End Threat - fox34.com
First suspected New World screwworm case detected in South Texas - Houston Public Media
First suspected New World screwworm case detected in South Texas - KERA News
Possible New World screwworm detected in Texas, USDA confirms testing underway - Brownfield Ag News
Breaking: New World Screwworm Might Have Been Detected in South Texas - drovers.com
Possible flesh-eating screwworm case in Texas after pest detected 25 miles from U.S. border, USDA says - CBS News
* News headlines sourced from Google News. Always verify critical information with official sources before acting.
What Texas Landowners Should Do Now
Inspect livestock daily
Check all animals for open wounds, unusual fly activity, or behavioral changes. Pay special attention to newborns.
Treat all wounds immediately
Any cut, scrape, or abrasion should be treated with wound spray containing insect repellent. Keep spray on hand at all times.
Monitor deer on your property
Watch game cameras for deer showing unusual behavior. Report anything suspicious to your TPWD regional biologist.
Report suspected cases
Livestock: TAHC 1-800-550-8242. Wildlife: TPWD tpwd.texas.gov. Don't wait — early reporting is critical.
Official Sources
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Signs to watch for, treatment steps, prevention, and what to do if you find a suspected case.
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