Texas and federal officials are intensifying efforts to contain the spread of the New World screwworm after the first U.S. case of the parasite in decades was confirmed in South Texas, raising concerns about potential impacts on the state’s livestock industry.
The discovery has prompted a coordinated response involving the Texas Animal Health Commission, the Texas Department of Agriculture, the U.S. Department of Agriculture and other agencies tasked with preventing the pest from establishing a foothold in the United States.
State officials have expanded surveillance efforts, increased livestock inspections and implemented movement controls in affected areas as they work to contain the outbreak. Veterinary teams have also been deployed to monitor livestock and investigate potential additional cases.
Gov. Greg Abbott issued a disaster proclamation related to the outbreak, allowing state agencies to mobilize resources and coordinate response efforts more quickly.
The New World screwworm is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals. Unlike common maggots that consume dead tissue, screwworm larvae burrow into healthy flesh, creating wounds that can become severe and potentially fatal if left untreated.
The parasite can infect cattle, horses, wildlife, pets and, in rare cases, humans.
The United States eradicated the New World screwworm in the 1960s through a large-scale sterile insect release program that is widely considered one of the most successful pest eradication efforts in U.S. history. The recent detection has alarmed agricultural officials because of the economic damage the parasite can cause if allowed to spread.
Texas is home to one of the nation’s largest cattle industries, and agricultural leaders warn that a widespread infestation could result in significant economic losses for ranchers and livestock producers. The outbreak could also affect interstate and international livestock movement if additional cases are detected.
Officials are increasing trapping and monitoring efforts in South Texas while coordinating with federal authorities and counterparts in Mexico to track the parasite’s movement and prevent further spread. Authorities are also preparing contingency plans that could include the use of sterile-fly release programs if necessary.
Agriculture experts say rapid detection and containment are critical because screwworm populations can spread quickly among livestock and wildlife if left unchecked.
While only a limited number of cases have been confirmed, officials say they are treating the situation aggressively to prevent a larger outbreak.
The coming weeks are expected to be critical as state and federal agencies continue testing, surveillance and containment operations across South Texas. The outcome could determine whether the outbreak remains isolated or develops into a broader threat to Texas agriculture and wildlife.