US EditionMexico’s Border Closed To Cattle Imports Due To New World Screwworm
- U.S. Agriculture Secretary Brooke Rollins closed the U.S.-Mexico border to cattle imports on May 11, 2025, due to a New World screwworm outbreak beginning in Chiapas in November 2024.
- The outbreak spread from Central America, driven by 40,000 cases in Guatemala and illegal cattle smuggling, prompting the U.S. to halt imports amid livestock and market threats.
- Mexico reported 369 screwworm cases, including six human infections by March 2025, invested $8.5 million, and released 90 million sterile flies weekly near export zones like Oaxaca and Veracruz.
- The border closure cut Mexican cattle exports by 60%, stranded 300,000 cattle, caused daily producer losses of $11.4 million, and spiked prices due to U.S. herd shortages.
- Both countries aim to resume trade via joint inspections and expand sterile fly production, but border security and funding delays continue to hinder outbreak control and economic recovery.
12 Articles
12 Articles
USDA cuts climate links as deadly livestock parasite spreads north
A deadly parasite once eliminated in the U.S. is having a resurgence in warmer regions of North and Central America, raising alarms as climate change and political inaction weaken decades of successful containment efforts.Ayurella Horn-Muller reports for Grist.In short:The U.S. Department of Agriculture's (USDA) long-running strategy to control the flesh-eating screwworm fly, which includes weekly aerial releases of sterilized insects across Cen…
USDA to maintain ban on Mexican livestock for 30 days; Mexico optimistic
A ban on Mexican livestock imports over fears of screwworm spread will remain in place for at least 30 days, the U.S. Agriculture Department said on Tuesday, though Mexico’s Agriculture Ministry said it was “confident” USDA would soon lift it. USDA earlier this month resumed a ban on imports of live Mexican cattle, horse and bison due to rising cases of the new world screwworm, a parasitic fly that burrows into warm-blooded animals and eventuall…
Mexico and U.S. Confront Screwworm to Restore $3 Billion Cattle Trade
Mexico’s Secretariat of Agriculture announced on May 28, 2025, an agreement with the U.S. to resume cattle exports, vital for $3 billion in annual trade. A screwworm outbreak, starting in Chiapas in November 2024, led to U.S. import bans in May 2025. The pest, spreading from Central America, threatened livestock and markets. The New World […]
Chihuahua, Chih.- Farmers have started to market their animals on the national market, given the lack of date by the United States for opening up to export and how expensive it is to keep the specimens in the pens. This was reported by the president of the Local Livestock Association of Chihuahua, Ricardo Terrazas Rubio, who explained that they have also seen a fall in prices for the amount of cattle that are in the country. He explained that wh…
Tensions Rise Between US and Mexico over New World Screwworm Threat
Additional screwworm information from the Big Bend Sentinel.NOTE: this article was originally published to BigBendSentinel.com on May 21, 2025. It was written by Gibran Caroline Boyce, Sandra Sadek and Alfredo Corchado.EL PASO — Zoom screens lit up across Mexico and Texas as over two dozen agricultural leaders, including those in Mexico’s Department of Agriculture, scrambled into an emergency virtual meeting. Just 24 hours earlier, U.S. Agricult…
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