Cattle are held in a corral before being exported to the United States through the Jeronimo-Santa Teresa border crossing after Agriculture Secretary Brooke Rollins announced an agreement with Mexico on the management of the New World screwworm at the Chihuahua Regional Livestock Union facility, outside Ciudad Juarez, Mexico, on April 29, 2025. Jose Luis Gonzalez/Reuters
A case of the New World screwworm has been detected in South Texas—the first known case of the flesh-eating parasite in the United States since 2017—the U.S. Department of Agriculture (USDA) announced June 3.
“The affected animal is a 3-week-old calf and larvae were identified in its umbilical area,” the USDA said. “To date, there have been no further detections.”
