Texas Cattle Under Siege — Trump Moves

Cows grazing in a mountainous pasture with trees

A deadly livestock parasite eradicated from America decades ago is back on Texas soil, forcing the Trump administration and Governor Greg Abbott to move fast before ranchers pay the price.

Story Snapshot

New World screwworm has been confirmed in Texas cattle for the first time since eradication, with additional cases now reported.
Federal and state officials under President Trump and Governor Abbott are deploying quarantines, movement controls, and mass sterile-fly releases.
Human risk is currently assessed as low, but the threat to cattle, wildlife, and rural economies is serious if containment fails.
Border-area detections in Mexico and new U.S. cases show how fragile national biosecurity becomes when parasites move north.

Dangerous Parasite Returns To Texas Herds

The United States Department of Agriculture (USDA) has officially confirmed that the New World screwworm, a flesh-eating parasitic fly that attacks warm-blooded animals, has reappeared in Texas cattle after decades of absence.^[3]^[6] On June 3, federal officials identified screwworm larvae in the umbilical area of a three-week-old calf in Zavala County, marking the first confirmed detection inside the United States in this new wave.^[3] State wildlife guidance underscores that these larvae feed on living tissue and can kill animals if infestations are not treated quickly.^[6]

Subsequent federal reporting confirms that this was not an isolated anomaly: additional Texas cases have now been announced after the initial Zavala County calf.^[5] The United States Department of Agriculture’s live dashboard tracking confirmed detections shows more than one affected animal as of early June, demonstrating that the parasite has managed to gain at least a limited foothold in U.S. herds.^[5] For ranchers already battling high input costs and market uncertainty, the return of a historic cattle killer is an unwelcome and potentially expensive threat.

Trump Administration, Abbott Launch Aggressive Containment Push

In response, the Animal and Plant Health Inspection Service (APHIS) within the United States Department of Agriculture has activated a full incident command structure with Texas counterparts to contain the outbreak.^[3] Federal officials established roughly a 20-kilometer infested zone around the initial detection and implemented quarantines, movement controls, and intensified surveillance inside that ring.^[3] This means cattle and other livestock movement in and out of the zone is now tightly managed to prevent the parasite from hitching a ride to new counties and states.

The containment plan leans heavily on a proven but resource-intensive tactic: saturating the region with sterile screwworm flies so that wild females lay eggs that never hatch.^[3] Federal briefings explain that, on top of an existing program releasing about four million sterile flies per week by air, the agency is now expediting targeted ground releases in the affected Texas area.^[3]^[2] National media reports cite officials saying that releases across the broader region now total tens of millions of sterile flies weekly in the United States and Mexico combined, reflecting a major cross-border push to choke off the pest’s advance.^[2]^[1]

Border Threat Highlights Costs Of Weak Biosecurity

For years, agriculture groups warned that New World screwworm detections marching north through Mexico could eventually cross the border. Mexican authorities previously confirmed cases in states roughly 120 to 200 miles south of Texas, and Texas Farm Bureau noted earlier in the year that the pest had been found on Mexican farms about 700 miles from the U.S. border before ultimately appearing here.^[5] The United States Department of Agriculture even suspended livestock imports from Mexico on a rolling basis to reduce the odds of the parasite riding in with traded animals.^[5]^[1]

Those warnings have now become reality, stressing the importance of strong borders and vigilant surveillance when it comes to animal diseases as well as illegal crossings. Texas officials emphasize that screwworm flies lay eggs in wounds or mucous membranes of cattle, wildlife, pets, and in rare cases humans, and that the larvae burrow into living flesh, causing severe pain, infection, and often death if untreated.^[6]^[4] For ranch families whose livelihoods rely on healthy calves and breeding stock, even a handful of uncontrolled cases can mean lost animals, veterinary bills, and tighter margins in an already challenging economy.

Low Human Risk, High Stakes For Ranchers And Wildlife

The Centers for Disease Control and Prevention (CDC) currently classify the human risk from this Texas screwworm event as low, stating that there have been no locally acquired human infestations in the United States.^[7]^[3] Past U.S. human cases tied to this parasite have been rare and typically travel-associated, not spread in American communities.^[3]^[7] However, both federal and state health guidance note that because screwworm targets all warm-blooded animals, Texans should be alert for suspicious wounds in livestock, pets, and wildlife and report them promptly.^[6]^[7]

Texas leaders clash over New World screwworm response https://t.co/w8WmFTS0xe

— High Plains Pundit (@hppundit) June 8, 2026

Texas wildlife authorities and extension experts are urging landowners to inspect animals daily, especially around wounds, navels, eyes, ears, nostrils, and reproductive organs, and to contact veterinarians or wildlife biologists immediately if they see live maggots in living tissue.^[6]^[7] Texas Farm Bureau and Texas A&M AgriLife Extension stress that early detection and isolation of suspected cases, combined with strict adherence to movement guidance from the Texas Animal Health Commission and the United States Department of Agriculture, are crucial to avoiding wider spread and protecting the state’s cattle industry.^[5]^[7] For conservative rural communities that feed the nation, the message is clear: vigilance now can prevent a costly biosecurity crisis later.