The United States will begin reopening its border to cattle imports from Mexico next month, ending a year-long suspension imposed over concerns about the spread of the New World screwworm parasite.
The U.S. Department of Agriculture (USDA) announced on Friday that the first port to resume cattle imports will be Douglas, Arizona, starting August 24, 2026. Additional ports in Santa Teresa and Columbus, New Mexico, are expected to reopen in phases after further safety assessments.
The import ban was introduced in May 2025 by President Donald Trump's administration following an outbreak of the flesh-eating New World screwworm (NWS), a dangerous parasite whose larvae feed on the living tissue of livestock and can cause severe injuries or death.
According to the USDA, every animal entering the United States through the reopened ports will undergo comprehensive inspections to ensure it is free of any signs of the parasite before being allowed into the country.
Although the screwworm has long existed in parts of Mexico, it resurfaced in the United States in early June. U.S. authorities have since confirmed 42 cases, with the nearest active case located approximately 325 miles from the Arizona border crossing.
U.S. Secretary of Agriculture Brooke Rollins described the border closure as a necessary step to protect the country's livestock industry from the highly destructive parasite.
The United States previously eradicated the New World screwworm in 1966 and successfully eliminated another outbreak in southern Florida in 2017. Officials say strict inspections and monitoring will remain in place as cattle imports gradually resume.
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