Meat-Eating Maggots Hit Texas

The New World screwworm is back in the United States, and the fight now is about containment before ranchers pay the price.

Quick Take

Federal officials confirmed a New World screwworm case in a Texas calf and treated it as a serious pest threat^[1].
USDA says the current risk to people is very low, and no locally acquired human infestations have been reported^[3]^[7].
Officials are using surveillance, movement controls, and sterile fly releases to stop spread^[3].
Texas agriculture leaders say early detection matters because the pest can spread fast through livestock wounds^[4]^[8].

Why The Texas Case Matters

USDA Animal and Plant Health Inspection Service confirmed New World screwworm in a 3-week-old calf in Zavala County, Texas, and said larvae were found in the animal’s umbilical area^[1]. That detail matters because screwworm flies lay eggs in open wounds and body openings, then the larvae feed on living tissue. The insect can cause severe damage, costly losses, and death if it is not caught early^[1]^[8].

The confirmed case does not mean a nationwide crisis has already formed. USDA said there were no further detections at the time of the announcement, and the Centers for Disease Control and Prevention said no locally acquired human infestations have been reported in the United States^[1]^[3]. That is the key divide in this story: the agricultural threat is real, while the public-health risk to most Americans remains low unless the fly spreads locally^[3]^[7].

How Officials Are Trying To Box It In

USDA says the response includes sterile fly releases, animal movement controls, surveillance, outreach, and education in affected areas^[3]. Texas officials and USDA leaders also described ground and aerial releases of sterile flies, trapping, checkpoints, and coordination with landowners and producers^[2]. The sterile insect technique has been part of past eradication efforts, and USDA says it is now importing and dispersing sterile flies in South Texas^[2]^[6].

That approach reflects a simple fact: screwworm control depends on speed. Texas Animal Health Commission warns that early detection and reporting are critical, and Texas A&M AgriLife says suspected animals should be isolated and moved only after guidance from officials^[4]^[8]. The parasite is dangerous because it turns small wounds, umbilical injuries, and other exposed tissue into a feeding ground for maggots^[1]^[8].

What Ranchers And Families Should Watch For

USDA tells residents to check pets and livestock for draining or enlarging wounds, discomfort, larvae, and eggs around the nose, ears, genitalia, and navels of newborn animals^[1]. Texas guidance adds that producers should watch for foul-smelling wounds, head shaking, biting at wounds, and unusual restlessness^[4]^[8]. Those signs matter because the worm attacks living tissue, not dead matter, and can do major harm before an owner realizes anything is wrong^[8]^[20].

For people, federal guidance says the risk stays low, but travelers to affected areas still need to keep open wounds clean and covered^[3]^[7]. The Centers for Disease Control and Prevention says risk is localized to places where flies are circulating, and that a travel-associated U.S. human case was confirmed after exposure abroad^[3]. That makes border awareness important, especially for anyone working around animals, ranches, or outdoor wounds in warm weather^[3]^[13].

🚨New World Screwworm Update🚨
15 cases have been confirmed in total across the U.S, with 12 cases active in Texas. We have been preparing for this, and I am working with USDA @SecRollins to combat this pest, protect our livestock industry, and mitigate economic impacts. Read the…

— Rep. Monica De La Cruz (@RepMonicaDLC) June 22, 2026

The bigger political lesson is that border biosecurity is not a theory; it is a practical duty of government. USDA has already restricted livestock imports from Mexico at different points in the broader outbreak, and Texas researchers warn that a wider spread could hit cattle, hunting, wildlife, and the food economy hard^[1]^[12]. For conservative readers, this is another reminder that weak borders and slow response can turn a manageable pest into a costly national problem^[12]^[18].