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New World Screwworm: What to Know - UPDATED June 26, 2026
06/12/2026

DSHS Response Roundup – Week of June 22, 2026 

 

New World screwworm (NWS) 

Current situation  

  • There have been no confirmed human cases of NWS in Texas. DSHS is ready to respond to human cases, should any occur. 
  • As of June 22, 2026, there have been 15 total confirmed animal cases in Texas: three cows in Zavala County (one inactive), two cows in La Salle County, a goat in Gillespie County, four cows and one goat in Edwards County, one sheep in Crockett County, one sheep in Sutton County (now inactive), one goat in Terrill County and one cow in Tom Green County.  
  • DSHS is prioritizing the safety of the food supply and assisting partner agencies in protecting Texas livestock and wildlife. 

 

Key messages 

  • The food supply in Texas is safe. 
  • Texas has a strong meat safety system. Every animal that enters the food supply is inspected by state or federal inspectors before and after slaughter. Those standard inspection practices would identify any wounds infested with NWS. 
  • Anyone who regularly interacts with animals should routinely inspect them for wounds and any sign of NWS infestation. And they should know how to report suspected cases. 
  • People who work around livestock, and people who sleep outdoors are at greatest risk for NWS. They should take precautions by keeping wounds clean and covered and using insect repellent. 

 

Key DSHS activities 

  • DSHS has resources to educate people how to prevent, identify and report NWS cases. Find them at the bottom of the DSHS New World Screwworm page. Spanish materials are also available on the DSHS website
  • Meat safety and dairy programs have distributed materials on NWS detection and reporting to licensed operations. 
  • Regional veterinarians have been presenting information to city and county elected officials in and around affected areas. 
  • DSHS and federal partners continue to inspect all animals entering the food supply. DSHS is increasing the frequency of inspections of operations that process animals directly for consumers. 

 

Reporting suspected cases 

  • Livestock and exotic animals: Texas Animal Health Commission regional office or 800-550-8242 
  • Pets and other companion animals: Individuals should take their pet to their veterinarian. Vets should contact the TAHC regional office or 800-550-8242. 

 

DSHS resources 

 

Other resources 

 

Graphics and informational flyers:

 

 

 

 

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 ORIGINAL POST

 

 

The New World Screwworm has been in the news lately, with confirmed detections of the insect in five Texas counties, according to the USDA. 


The parasitic fly that feeds on the tissues of warm-blooded animals is a serious pest of livestock and wildlife. It has NOT yet been reported in Caldwell County as of this evening (6/12).


Early detection is key. Watch for unusual wounds that do not heal, wounds containing visible larvae (maggots), or signs of infection in livestock and pets. 

 

 

INFORMATIONAL PAMPHLETS


 REPORT SUSPECTED CASES

  • Reporting suspected human cases or human health concerns in Public Health Region 7: (254) 778-6744
  • Reporting suspected NWS in pets and livestock to Texas Animal Health Commission: 1-800-550-8242
  • Reporting suspected NWS in wildlife to Texas Parks and Wildlife Department: (512) 389-4505

 

DECLARATION OF DISASTER

 

A state of disaster has been declared for Caldwell County due to the imminent threat posed by the New World Screwworm.

 

Declarations of disaster are issued to unlock emergency funding, activate mutual aid, and grant local leaders special legal powers to manage threats. Without an official declaration, a local government cannot easily access higher-level resources.

 

View the declaration

 

 

USEFUL LINKS FOR INFORMATION AND TRACKING CASES