Sep 3, 2025
Mexican cattle industry faces significant losses due to import restrictions
The United States has imposed a halt on cattle imports from Mexico due to concerns over the New World screwworm fly, a parasite that poses a significant threat to livestock. This measure has resulted in substantial financial losses for Mexican cattle producers.
Background
The New World screwworm fly, known scientifically as Cochliomyia hominivorax, is a parasitic insect that lays eggs in open wounds of warm-blooded animals, including cattle and humans. The larvae can cause severe infections, leading to significant health and economic impacts. The parasite has been a recurring issue in regions of Central and South America, with recent outbreaks reported in Mexico and Panama.
Impact on Trade and Economy
Since the US implemented import restrictions in November 2024, Mexican cattle producers have suffered losses estimated at approximately EUR 733 million. This has been particularly detrimental given the 73% drop in calf exports from Mexico in July 2025 compared to the previous year. The discovery of a screwworm larva in a US traveler returning from Mexico has heightened fears of further restrictions, potentially extending to beef products.
Response and Measures
In response to the crisis, Mexican President Claudia Sheinbaum has announced a support program for affected cattle producers. Concurrently, Mexico and the United States are collaborating on pest control measures, including the release of sterile flies to curb the parasite's population. The US Department of Agriculture is also intensifying border controls to prevent the spread of infected wildlife across the border.
The US, having eradicated the screwworm fly in the past, is preparing to re-establish facilities capable of producing sterile flies to manage potential outbreaks. Agriculture Secretary Brooke Rollins has expressed confidence in overcoming this challenge, citing past successes in eradicating the parasite.
The situation underscores the importance of vigilant biosecurity measures and international cooperation to protect livestock industries from parasitic threats.