U.S. Halts Livestock Imports from Mexico Due to Screwworm

May 12, 2025
By Farms.com

USDA Suspends Livestock Imports Amid Screwworm Threat

U.S. Secretary of Agriculture Brooke L. Rollins announced the immediate suspension of live cattle, horse, and bison imports through U.S. southern border ports due to the rapid spread of New World Screwworm (NWS) in Mexico. NWS has been detected as far north as Oaxaca and Veracruz, approximately 700 miles from the U.S. border.

Despite ongoing efforts by the U.S. and Mexico to control NWS, its northward spread necessitates further action. Effective immediately, the USDA Animal Plant Health Inspection Service (APHIS) and Customs and Border Protection (CBP) will restrict live animal imports from Mexico on a month-by-month basis until containment is achieved.

USDA will review data and metrics with Mexico in two weeks to reassess the situation. Livestock currently in holding will undergo normal processing, including APHIS port Veterinary Medical Officer inspections to ensure they are NWS-free.

“The United States has ordered the suspension of livestock imports through ports of entry along our southern border after the continued spread of the New World Screwworm in Mexico. Secretary Berdegué and I have worked closely on the NWS response; however, it is my duty to take all steps within my control to protect the livestock industry in the United States from this devastating pest,” said Secretary Rollins.

“The protection of our animals and safety of our nation’s food supply is a national security issue of the utmost importance. Once we see increased surveillance and eradication efforts, and the positive results of those actions, we remain committed to opening the border for livestock trade. This is not about politics or punishment of Mexico, rather it is about food and animal safety.”

Eradication requires robust field surveillance, controlled animal movement, and sustained sterile insect dispersal. USDA is also utilizing Tick Riders to monitor livestock and wildlife along the southern border for NWS.

The U.S. previously eradicated NWS at great cost, but recent detections in Mexico pose a renewed threat to animal health and food security.

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