Flesh-Eating Fly Invades Texas

A flesh‑eating livestock parasite that America wiped out 60 years ago is back in Texas, and how we respond now will decide whether this becomes a border scare or a nationwide ranching disaster.

Story Snapshot

A confirmed New World screwworm case in a Texas calf has triggered emergency action from federal and state agencies.
The Trump administration’s USDA says the parasite is a serious livestock threat but stresses food remains safe and human risk is low.
Experts warn that, if not contained, screwworm could cost Texas ranchers and hunters billions in losses.
Producers, not bureaucrats, will be the front line: inspecting animals, reporting fast, and cooperating with movement limits and sterile-fly drops.

What Exactly Came Back — And Why Ranchers Are Alarmed

The New World screwworm is not a normal fly; its larvae burrow into the flesh of living animals and eat them alive, often killing untreated livestock.^[20] Female flies lay eggs in fresh wounds like branding marks, castration cuts, or a newborn calf’s navel.^[18]^[21] Within days, hundreds of larvae can infest a single wound and tunnel deeper as they grow.^[18] This parasite can hit cattle, wildlife, pets, and, in rare cases, people, which makes early detection and fast treatment critical for anyone who depends on healthy herds.^[8]^[18]^[20]

After decades of vigilance, the United States had eradicated screwworm within its borders, and it became one of agriculture’s biggest success stories.^[21] That changed on June 3, 2026, when the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service confirmed New World screwworm in a three‑week‑old calf in Zavala County, Texas, near the southern border.^[1]^[15]^[22] Larvae were found in the calf’s umbilical area, a classic high‑risk site in newborn livestock.^[1] It was the first home‑grown animal case tied to the current Central America–Mexico outbreak.^[3]

How Big Is The Threat — Livestock, Wildlife, And Your Family

Federal and university experts agree on two key points: screwworm is a serious agricultural threat, and at this stage the risk to the general public is low.^[3]^[7]^[14] The Centers for Disease Control and Prevention reports no locally acquired human cases in the United States in this outbreak and says the risk of infestation in people “remains low” and is limited to areas where the flies circulate.^[3] A recent medical review echoes this, calling human risk low while warning that once the fly establishes in livestock, it can spread fast and cause heavy losses if detection is slow.^[14]

For ranchers and rural communities, the economic stakes are enormous. Texas A&M experts estimate that if screwworm truly establishes in Texas, it could cost about $2.1 billion to the cattle industry and $9 billion to the hunting and wildlife sector in that state alone.^[12] Historically, screwworm outbreaks have caused severe pain, secondary infections, and death in livestock, forcing expensive treatments and culling.^[18]^[20]^[25] That is why cattle states pushed hard in past decades to drive this pest south and why today’s ranch families watch this news with real concern, not media panic.

What The Trump Administration And Texas Are Doing Now

The Trump administration’s USDA says this is “not a food safety issue” and that inspected meat remains safe; the fly does not infest packaged beef, fruits, or vegetables.^[1]^[7]^[17] Federal officials have activated their New World screwworm response playbook, which includes aggressive surveillance, animal‑movement controls, and releases of sterile flies to crash the wild population.^[1]^[2]^[3] In a recent briefing, USDA leaders described ground and aerial deployment of millions of sterile flies in south Texas and plans for a new sterile‑fly production plant in Edinburg to support a long campaign.^[2]^[3]

🚨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

State partners are leaning in as well. The Texas Animal Health Commission urges ranchers to watch cattle closely for draining wounds, maggots, or foul smells, especially at body openings and navels of newborn animals, and to report suspected cases within 24 hours.^[4]^[20] Texas A&M AgriLife advises producers to isolate suspect animals, avoid moving them, remove larvae under veterinary care, and treat wounds with approved topical pesticides.^[8]^[20] This on‑the‑ground vigilance by owners and vets is exactly what made the original eradication program successful and will decide how far this outbreak goes now.^[18]^[21]

Where Conservative Ranch Families Fit In The Fight

While professional activists in coastal cities talk about bugs and “One Health” in the abstract, ranch families in Texas, New Mexico, and other border states will carry the real burden if this parasite spreads. Experts warn that Texas, with its huge cattle herds and warm climate, is one of the most suitable states for screwworm to establish if given the chance, which makes rapid, local action essential.^[2]^[18] Producers are being urged to inspect animals often, keep all wounds clean and covered, and work with trusted veterinarians for preventive treatments and fast reporting.^[4]^[6]^[8]

For now, families can take some comfort: food in the grocery store is safe, and there is no sign of human‑to‑human spread or hidden human cases inside the country.^[1]^[3]^[7]^[17] But this is a reminder of how quickly border‑driven animal threats can hit the heartland and why secure borders, strong surveillance, and a serious, accountable federal response matter. The Trump administration’s agencies, along with Texas leaders and landowners, now have to finish the job: keep screwworm pinned to the border region, crush it with proven tools like sterile‑fly releases, and defend American livestock before this becomes another slow‑moving crisis that Washington shrugs off and rural families pay for.