PRESIDIO COUNTY – The U.S. Department of Agriculture (USDA) has confirmed a significant and alarming finding: the first case of New World screwworm has been detected in a horse in Texas. This marks a critical moment for equine health and welfare across the region.
The discovery was reported on September 9, when the parasite was identified in the hind leg of a working ranch horse in Presidio County, located in the picturesque Big Bend region of Texas. The U.S. Equestrian Federation has been actively monitoring the situation and has communicated the urgency of this finding to horse owners.
As of the latest updates from the USDA, there are currently two active cases of screwworm in Texas. Alongside the horse case, another instance has been reported in a dog in Crockett County. The New World screwworm, a parasitic fly larvae, poses serious health risks to animals, leading to significant tissue damage and potential infections if not addressed promptly.
In light of this situation, horse owners are strongly encouraged to perform daily checks on their animals. Signs to look out for include cuts, swelling, unusual drainage, foul odors, or the presence of maggots. Immediate veterinary consultation is advised for any unusual findings in wounds, as early intervention can be crucial for successful treatment.
Officials are actively monitoring the ongoing cases in Texas and are urging all animal owners to remain vigilant. Reporting any concerns to a veterinarian is essential for managing this threat effectively. The USDA and the U.S. Equestrian Federation continue to provide resources and updates to ensure that horse owners are informed and prepared.
This incident underscores the importance of awareness and education in animal health. For more information on how to protect your horses and other livestock from parasites like the New World screwworm, consult with your veterinarian or contact local agricultural extension services.

