On Jun. 18, 2025, the U.S. Department of Agriculture announced it has launched an $8.5 million sterile New World screwworm (NWS) fly dispersal facility in South Texas and announced a sweeping five-pronged plan to enhance USDA’s already robust ability to detect, control, and eliminate this pest.

NWS is a devastating pest that causes serious and often deadly damage to livestock, wildlife, pets, and in rare cases, humans. While NWS has been eradicated from the United States for decades, recent detections in Mexico as far north as Oaxaca and Veracruz, about 700 miles away from the U.S. border, led to the immediate suspension of live cattle, horse, and bison imports through U.S. ports of entry along the southern border on May 11, 2025.

USDA’s recent $21 million expenditure went toward renovating an existing fruit fly production facility in Metapa, Mexico, which will provide an additional 60-100 million sterile flies a week to stop the spread, on top of the over 100 million already produced in Panama. This will result in at least 160 million flies per week.

Over the last two weeks, USDA conducted a robust, in-person audit of Mexico’s animal health controls and will maintain close continual monitoring of these aspects moving forward and will make continuous improvements. These in-person visits have allowed a unique opportunity for APHIS to see first-hand the challenges and opportunities in Mexico toward combating NWS.

USDA is working closely with Mexico to improve its surveillance and detection of NWS, which includes but is not limited to regularly providing traps, lures, and technical expertise to Mexico.