New World Screwworm Resources

The return of New World screwworm to the United States has prompted a series of travel and export restrictions from U.S. trading partners. As those partners notify USDA APHIS of new or updated requirements, APHIS is posting them to its official websites — and because the situation is still developing, including with Mexico, those pages are the most reliable, up-to-date source for anyone moving, exporting, or traveling with animals.

Effective immediately, and until further information is received from Mexico, the export of a range of species from all U.S. states is on hold — including cattle, equine, sheep and goats, swine, pet dogs, ferrets, wild ruminants, and certain birds such as songbirds, ornamental birds, and raptors. Requirements apply to animals coming the other way, too: as of November 22, 2024, Mexico is considered affected with screwworm, so all dogs — including U.S.-origin dogs returning after travel to Mexico — must meet APHIS screwworm-freedom certification requirements upon entry or re-entry. Because the specific categories and conditions are being clarified continually, please confirm the current requirements on the APHIS pages before making any plans.

USDA APHIS has asked that members not contact their offices for country-specific details, as they don't have information beyond what's posted online — and those pages are updated as soon as new information is received. APHIS is working as quickly as possible with U.S. trading partners and appreciates everyone's patience as they work through these complex issues.