Carrizo Springs ranchers should watch screwworm rules closely

USDA confirmed New World screwworm in Texas on June 3, when it found the pest in a 3-week-old calf in Zavala County. TAHC now says an infested-zone quarantine is in place across parts of 21 Texas counties, and animals moving outside the zone need inspection and a movement certificate.

For Carrizo Springs readers, that makes this a practical ranch and pet-owner issue. Nearby South Texas livestock movement can be slowed by inspection rules, treatment checks, and the need to keep paperwork current before animals travel to auctions, vets, or other properties.

What to watch for

Officials say to look for draining or enlarging wounds, foul odors, swelling, maggots, or eggs, especially around the nose, ears, navel, or genital area. Keep open wounds clean and covered, and report suspected Texas livestock cases within 24 hours.

Texas livestock reports go to the TAHC region office or the state veterinarian on call at 1-800-550-8242. USDA says the broader response still centers on surveillance, movement controls, and sterile fly releases, and NRCS Texas says it can offer technical assistance to producers.

Sources

• USDA APHIS — USDA confirms presence of New World screwworm in the United States
• Texas Animal Health Commission — New World screwworm emergency page
• USDA NRCS Texas — Assistance update for producers with New World screwworm
• Texas Public Radio — Report on sterile fly production and response urgency