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US-Mexico port in NM set to reopen despite nearby screwworm detection

Cattle will be inspected, treated and covered with insecticide before crossing as USDA expands surveillance and releases more than 1 billion sterile flies.

  • On Thursday, the U.S. Department of Agriculture reopened the Santa Teresa Port of Entry in New Mexico to livestock imports, restricting cattle movement to neighboring Chihuahua under strict new entry protocols.
  • The USDA halted livestock trade at the port last year to prevent the spread of the New World screwworm, a parasite eradicated in the United States in the 1960s but recently resurfacing in Mexico.
  • Despite 50 reported U.S. cases and more than 300 in Chihuahua as of Sept. 21, the USDA has released more than one billion sterile flies to neutralize screwworm populations and contain the outbreak.
  • Imported cattle require five to eight months to reach slaughter weight, so the reopening will not swiftly lower store prices. "There's not going to be a change," said Jeff Stolle, Nebraska Cattlemen marketing vice president.
  • Rep. Teresa Leger Fernandez plans to monitor the reopening closely, citing past federal funding cuts for screwworm detection. The USDA aims to evaluate reopening the Columbus, New Mexico, port next.
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unomásuno.com.mx broke the news on Monday, September 21, 2026.
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