New Restrictions on Animal Entry Due to New World Screwworm

Jul 20, 2026

Background - New World Screwworm is a parasite of warm-blooded animals that has recently been reintroduced into the United States. It infests healthy tissue and can cause severe wounds. Parts of Southwestern United States are currently experiencing an infestation. Though eradication efforts are ongoing, the parasite is currently expanding its range. New World Screwworm was eradicated from the United States in 1966 after a more than 10 year campaign. It caused severe disease and even death in domestic animals and people. Though there are no food concerns the effects on NH could be severe if introduced.

To avoid introducing new world screwworm into NH in dogs and cats, NH AGR 4200 NOW requires:

A Certificate of Veterinary Inspection (CVI) for animals entering the State from affected areas which has a validity period of 5 days.

Source : nh.gov

Video: Biosecurity Compliance - Dr. Jean-Pierre Vaillancourt

In this episode of The Swine it Podcast Show Canada, Dr. Jean-Pierre Vaillancourt, professor of veterinary medicine at the University of Montreal, discusses the human side of biosecurity compliance. He explains why protocols often fail when people are tired, unconvinced, undertrained, or working with impractical systems, and how leadership, employee input, technology, feedback, and small incentives can make biosecurity more consistent on swine farms. Listen now on all major platforms!

"Biosecurity only works when people repeatedly do the right thing, and that means the system has to support compliance every day."

Meet the guest: Dr. Jean-Pierre Vaillancourt is a veterinarian and professor of veterinary medicine at the University of Montreal. His work focuses on biosecurity, infectious disease control, and practical risk reduction in animal production systems, with experience across swine and poultry health. Learn more from Dr. Jean-Pierre Vaillancourt on The Swine it Podcast Show Canada, available on all major platforms.