New World Screwworms: A Threat to Livestock in South Texas

Introduction to New World Screwworms

The New World Screwworm (NWS), known for its flesh-eating behavior, has made its way to South Texas. This parasitic fly poses a serious threat to livestock and other warm-blooded animals.

USDA’s Confirmation and Response

The USDA Animal and Plant Health Inspection Service (APHIS) confirmed NWS larvae in a calf’s umbilical area in Zavala County, Texas. By June 11, six cases had been reported. NWS can significantly impact livestock, pets, wildlife, and occasionally humans and birds. While screwworms don’t taint meat, they could elevate beef prices, already at record highs.

Suspension of Animal Imports

USDA Secretary Brooke Rollins announced the suspension of live cattle, horse, and bison imports due to NWS’s spread from Mexico. This decision was made in collaboration with Texas Governor Greg Abbott, ranchers, researchers, and officials.

A Historical Fight Against NWS

The screwworm was eradicated from the United States in 1966.

USDA officials, including Dudley Hoskins, emphasized efforts to combat NWS since its rise in Central America and Mexico. A rapid response team is now active in Texas, utilizing sterile male flies and quarantine zones.

Criticism and Response Plans

Texas Agriculture Commissioner Sid Miller criticized USDA’s approach, arguing it relied too much on partial solutions. He urged President Trump to direct resources, including SWASS, to tackle this threat.

Texas Land Commission’s Support

Texas Land Commissioner Dawn Buckingham offered state land access for response efforts. She highlighted the widespread risk to not only livestock but also wildlife and pets. The Commission is prepared to provide space for personnel, sterile fly breeding, and trapping.

Conclusion and Hope for Control

Although screwworms have returned, Buckingham emphasized available medication and control methods. History shows success in managing these pests, suggesting optimism for current efforts.