New World screwworm cases spike tenfold across Borderland in past month

The U.S. Department of Agriculture has confirmed more than 20 cases of New World screwworm in the past month, according to KVIA, marking a tenfold increase in the parasite's presence across the region.

The screwworm fly lays eggs in wounds or openings in living tissue. After hatching, the larvae feed on living flesh and can cause serious injury or death.

Texas Agriculture Commissioner Sid Miller told ABC-7 that the most recent cases have primarily affected dogs, including one discovered in Socorro, Texas, on Wednesday. The dog's owner sought treatment at a private veterinarian, according to Socorro Police Department. Over the weekend, New Mexico health officials confirmed a sheep at the New Mexico State University campus had the infection.

Miller cited the region's recent heavy rainfall as a contributing factor to the outbreak. "That's obviously adding to it. That's not typical for your area of the state or even New Mexico or Arizona," Miller said, according to KVIA. The insect thrives in subtropical conditions, and the unusual moisture is creating favorable breeding environments.

Residents should monitor pets and livestock for warning signs, including open wounds that worsen or fail to heal, visible maggots or larvae, foul-smelling wounds with swelling or unusual discharge, and excessive licking, biting or scratching. Animals showing head shaking, loss of appetite, unusual behavior, restlessness, lethargy, or self-isolation should be evaluated immediately.

Miller advised pet owners to inspect their animals regularly and consult a veterinarian at the first sign of concern. "Inspect your pet, any open wounds, be the, you know, observe that, talk to your veterinarian," Miller told ABC-7.

To report a suspected New World screwworm case in domestic animals, residents should contact a veterinarian or the Texas Animal Health Commission at 1-800-550-8242. Socorro residents can also contact the Socorro Police Department's Animal Control Unit at (915) 858-9237. Wildlife cases should be reported to the Texas Parks and Wildlife Department through a local TPWD wildlife biologist or by calling (512) 389-4505.