Presidio County, Texas – The U.S. Department of Agriculture confirmed Wednesday that a working ranch horse in Presidio County is the first horse in the United States to test positive for New World screwworm, a flesh‑eating parasite that has historically devastated livestock.
State response and movement restrictions
The Texas Animal Health Commission, which detected the case, immediately issued an order prohibiting the movement of all warm‑blooded animals outside a designated “infested” zone that includes parts of Presidio and neighboring Jeff Davis counties. The restriction is intended to contain any potential spread while officials assess the extent of the infestation.
Historical context and economic risk
New World screwworm outbreaks once killed thousands of cattle, sheep and other livestock across the United States before a nationwide eradication program succeeded in the 1960s. Experts now warn that a renewed outbreak could have serious economic consequences. In Texas, analysts estimate that a widespread screwworm epidemic could cost the state’s agricultural economy as much as $1.8 billion.
Industry guidance for horse owners
The U.S. Equestrian Federation, which oversees the U.S. Equestrian Open, released a statement urging horse owners to inspect their animals regularly. “We encourage every horse owner to help protect their horses and the broader equine community by practicing good wound care, fly control, and biosecurity,” the federation said.
Owners are advised to keep wounds clean, apply appropriate topical treatments, and reduce fly exposure, which can transmit the parasite. Prompt reporting of any suspicious lesions to local animal health officials is also recommended.
What is known about the infected horse
According to the USDA website, the parasite was found in the hind limb of the horse. No further details about the animal’s age, breed or exact location have been released. The USDA and Texas authorities have not commented on how the horse became infected, and investigations are ongoing.
Potential spread and monitoring
Recent Reuters reporting highlighted concerns that smuggled animals, including horses, could serve as carriers for the screwworm parasite. While the source of this particular infection remains unclear, the rapid response by state and federal agencies demonstrates a coordinated effort to prevent a larger outbreak.
Veterinary officials will continue to monitor livestock in the designated zone and surrounding areas. They are also conducting surveillance of cattle herds, which have shown months‑long infestations in the region.
Community impact
Presidio County’s ranching community, which relies heavily on livestock and equine work, is closely watching the situation. Local businesses that support ranch operations have expressed support for the containment measures, emphasizing the importance of protecting both animal health and the regional economy.
Residents are encouraged to stay informed through updates from the Texas Animal Health Commission and the USDA. Further guidance will be issued as more information becomes available.
Original reporting: Appleton, WI News Feed (HLL/CB) — read the source article.
