Screwworm Threat Raises New Concerns for Houston Ranchers

Ranchers around Houston, including operations in Harris County and nearby rural areas, are following reports about screwworm with growing concern. The pest has not been reported in the city itself, but the possibility of its return matters across Southeast Texas because cattle, horses, wildlife, and other warm-blooded animals can all be affected.

ABC13 reported that local ranchers are worried about the reemergence of screwworm, a parasitic fly larva that feeds on living tissue. The concern centers on the risk to livestock health and the cost of controlling any outbreak if the pest spreads closer to Texas ranchland.

Screwworm threat puts livestock operators on alert

Screwworm was eradicated from the United States decades ago through a long-term control effort that relied on releasing sterile male flies. Its name comes from the way larvae burrow into open wounds, creating severe infections that can worsen fast without treatment. Ranchers watch for signs in animals with cuts, branding wounds, or other exposed tissue because those sites can attract flies.

For producers near Houston, the concern is practical. A single infestation can harm an animal quickly and create extra veterinary costs, labor, and herd management problems. Ranchers interviewed by ABC13 said the issue is serious because even one confirmed case can trigger broader concern across the cattle industry.

Why the risk matters in Southeast Texas

Houston is a major hub for agriculture, livestock transport, and veterinary services across the region. That makes any animal health threat more than a rural issue. Ranches, fairs, auctions, and animal movement through Southeast Texas can raise the stakes when officials are trying to limit exposure and detect cases early.

ABC13's report focused on the worry among ranchers as they follow developments and assess the chance of screwworm moving closer to Texas. The station did not report a Houston-area outbreak, but the concern reflects how quickly animal health issues can affect producers who rely on healthy herds and prompt treatment when injuries happen.

Prevention depends on early detection and treatment

Screwworm control usually starts with routine inspection of animals, quick treatment of wounds, and fast reporting of suspected cases to veterinarians or agriculture officials. Early detection matters because larvae can spread damage fast and increase the risk of broader exposure among livestock and wildlife.

State and federal animal health agencies have used surveillance, treatment protocols, and sterile fly programs to stop screwworm before it can reestablish a foothold in the United States. For Houston-area ranchers, the next step is continued monitoring as officials track the situation and producers move into the warmer months, when flies are more active.

This article is a summary of reporting by ABC13 Houston. Read the full story here.