The words "flesh-eating parasite" grab attention for a reason.

But behind the alarming headlines is a more specific story: the current U.S. cases involve livestock, pets, and wildlife not people.

WHAT HAPPENED

New World screwworm is a parasitic fly whose larvae feed on the living tissue of warm-blooded animals.

According to recent reports, 15 confirmed cases have been detected in the United States since early June 2026. Most cases have been found in Texas, with at least one case reported in New Mexico.

The detections have sparked criticism from some commentators who argue the federal government should declare a state of emergency.

Others point out that federal and state agencies have already launched a response aimed at containing the parasite before it spreads further.

Importantly, there have been no confirmed human cases linked to the recent U.S. detections.

FACT BOX

— What the Evidence Shows

• Confirmed U.S. cases: 15
• Parasite: New World screwworm
• Affected: Livestock, pets, and wildlife
• States involved: Texas and New Mexico
• Confirmed human cases: 0

THE BIGGER QUESTION

The real concern is not the current number of cases.

The concern is what happens if the parasite becomes established in the United States again.

New World screwworm was eradicated from the U.S. decades ago through a massive program that released sterile male flies to stop reproduction. If the pest spreads widely, it could threaten ranchers, pet owners, wildlife populations, and food production.

The debate now centers on whether current control efforts are enough or whether stronger federal action is needed before the problem grows.

WHAT HAPPENS NOW

The U.S. Department of Agriculture and animal health officials will continue monitoring new cases and expanding surveillance.

Control efforts include releasing sterile male flies, tracking infected animals, and strengthening detection systems in affected areas.

The success or failure of these measures will likely determine whether the outbreak remains limited or expands into a larger agricultural problem.

WHAT WE STILL DON'T KNOW

1. How many additional cases may be discovered in the coming weeks?
2. Whether the parasite has spread beyond currently known locations.
3. If federal officials will eventually declare a state of emergency.