New World Screwworm, HPAI Underscore Importance of Food Animal Health, Animal Disease Surveillance Efforts

Jun 17, 2026

By Mary Hightower

The return of New World screwworm to the United States and the global struggle against highly pathogenic avian influenza demonstrate the importance of disease surveillance to protect food animal health, a team of agricultural economists said.

With the emergence of foot-and-mouth, “mad cow” disease and other epidemics, global animal agriculture has seen its share of losses over the decades.

Earlier this month New World Screwworm was confirmed in Texas and New Mexico after being largely eradicated from the United States in the 1960s. The U.S. Department of Agriculture said screwworm does not pose a threat to the food system.

The consequences of how those diseases are tracked and contained front and center in “Lessons Learned in U.S. Animal Disease Surveillance for Commercial and Smallholder Systems in the Twenty-First Century,” an article from “Choices. The magazine of food, farm and resource issues,” published by the Agricultural and Applied Economics Association.

Eruption of diseases in agriculture requires tailored responses, said Amy Hagerman, Oklahoma State University associate professor and extension specialist for agriculture and food policy. Hagerman was lead author on the article.

Source : uada.edu

Video: Five Confirmed New World Screwworm Cases Raise Alarm for Livestock and Pet Owners

Pat Hoffmann, Swine Technical Consultant at Elanco Animal Health tells us about the impact of New World Screwworm. The emergence of New World screwworm in the U.S. creates a threat for veterinarians, livestock producers and pet owners that has not been seen north of the Florida Keys since the fly was eradicated from the United States more than 50 years ago. New World screwworm (Cochliomyia hominivorax) larvae feed on living tissue and can affect a wide range of warm-blooded animals, including livestock, companion animals, wildlife, and even humans.
“New World screwworm could have a devastating impact on animal health, welfare, and producer livelihoods,” said Jeff Simmons, President and CEO, Elanco Animal Health. “We want to thank the FDA, EPA and USDA, for all their work to prepare for this threat. We’re committed to supporting our customers during this challenging time by delivering innovation, scientific expertise, and available resources to help treat New World screwworm and support the health and well-being of animals.”
Elanco is working alongside the U.S. animal health industry to help them fight against this parasite, offering a portfolio of options for pets and livestock that can help treat New World screwworm larvae infestations.