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Pork producers address USDA's New World screwworm response

The National Pork Producers Council submitted comments on the USDA's draft response plan for a New World screwworm detection in the United States. NPPC's feedback addressed areas of the response including movement controls and movements to slaughter, treatment and physical examinations, among others.

NWS is a flesh-eating parasite from female flies that lay eggs in wounds on warm-blooded animals, including pigs and people. According to USDA, animals that recently have given birth, suffered an injury, or had a surgical procedure such as tail docking or branding are most vulnerable. Even tick bites can attract NWS flies.

The disease has moved from South America through Central America and into Mexico over the past few years, with a case recently being identified in cattle a few hundred miles south of the U.S.-Mexico border. It is endemic in Cuba, the Dominican Republic, Haiti and some South American countries.

In May, USDA closed the U.S. southern border to imports of cattle from Mexico to prevent NWS from entering the United States. USDA unveiled plans in August that included building a sterile fly production facility in south Texas, investing in new technologies to eradicate NWS, and increasing surveillance at U.S. ports of entry.

NPPC has been working with USDA, FDA, the American Association of Swine Veterinarians, the Swine Health Information Center and the National Pork Board to understand knowledge gaps and opportunities to better prepare for this pest.

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Four Star Pork Industry Conf - Back to Basics: Fundamentals drive vaccine performance

Video: Four Star Pork Industry Conf - Back to Basics: Fundamentals drive vaccine performance

At a time when disease pressure continues to challenge pork production systems across the United States, vaccination remains one of the most valuable and heavily debated tools available to veterinarians and producers.

Speaking at the 2025 Four Star Pork Industry Conference in Muncie, Indiana, Dr. Daniel Gascho, veterinarian at Four Star Veterinary Service, encouraged the industry to return to fundamentals in how vaccines are selected, handled and administered across sow farms, gilt development units and grow-finish operations.

Gascho acknowledged at the outset that vaccination can quickly become a technical and sometimes tedious topic. But he said that real-world execution, not complex immunology, is where most vaccine failures occur.