The state of Texas is facing an urgent agricultural crisis with the resurgence of the New world screwworma flesh-eating parasite that poses a significant threat to livestock, wildlife, and even humans. More than a week after the first detection, the state has shifted into full containment mode, implementing a multi-faceted response to prevent the spread of this devastating pest.
The New World screwworm, Cochliomyia hominivoraxwas eradicated from the United States in the 1960s but has recently re-emerged in Texas, causing concern among ranchers and agricultural officials. The parasite’s larvae feed on living tissue, leading to severe injuries and potential death if left untreated. With eight confirmed cases as of Friday, the state is taking decisive action to curb the outbreak.
Statewide mobilization against screwworm spread
Governor Greg Abbott has expanded a disaster declaration to authorize all available state resources for containment efforts. A critical component of this response is the release of sterile male screwworm flieswhich mate with female flies to prevent reproduction and suppress the population. Currently, approximately 4 million sterile flies are being released weekly near the U.S.-Mexico border.
To bolster these efforts, construction of a $750 million sterile fly production facility at Moore Air Base near Edinburg is being accelerated. Once operational in 2027, this facility is expected to produce up to 100 million sterile flies per week. Additionally, Travis County has issued a preemptive disaster declaration to prepare for potential screwworm detections, despite having no confirmed cases.
Collaborative efforts and rancher precautions
The Texas General Land Office, led by Land Commissioner Dawn Buckingham, has offered state-managed lands to support the screwworm response. These lands can be used for sterile fly release operations, temporary quarantine zones, and livestock monitoring efforts. Buckingham emphasized the importance of collaboration and vigilance in protecting the state’s food supply and livestock health.
Ranchers across Texas are taking proactive measures to safeguard their animals. Dace Duke, a cattle rancher near Coleman in Central Texas, recalled the unmistakable signs of a screwworm infestation, including a foul odor reminiscent of rotten flesh. In neighboring states, such as New Mexico, ranchers are increasing monitoring efforts and postponing elective procedures that could create open wounds, providing potential entry points for screwworm flies.
Monitoring and early detection
Tom Paterson, president of the New Mexico Cattle Growers’ Association, highlighted the importance of watching for wounds, unusual behavior, loss of appetite, head shaking, unusual odors, and the presence of larvae in wounds. Early detection and prompt treatment are crucial in preventing the spread of the parasite and minimizing its impact on livestock.
As Texas continues to combat the New World screwworm outbreak, the collaborative efforts of state agencies, ranchers, and agricultural officials are proving vital in protecting the state’s valuable livestock industry and preventing further spread of this destructive pest.