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Flesh-eating screwworm is confirmed in the U.S., officials say

A New World screwworm has been detected in a bovine located in Zavala County, Texas, the U.S. Department of Agriculture's Animal and Plant Health Inspection Service said. A three-week-old calf was affected, with larvae were identified in its umbilical area, according to a press statement on Wednesday, adding that there are no further detections to date. "USDA invested heavily in the tools needed to eliminate NWS ever since cases started increasing in Central America and Mexico.

CNBC 6d ago

U.S. confirms second Texas screwworm case, Canada restricts livestock imports

The U.S. Department of Agriculture confirmed a second case of New World screwworm, a flesh-eating parasite, in Texas. The latest detection was found in a one-month-old calf in Zavala County, Texas, roughly 5.6 miles from the first confirmed case announced earlier this month, the USDA's Animal and Plant Health Inspection Service said Friday. Additional samples collected from the surrounding area have tested negative so far.

CNBC 3d ago

What to know about the New World screwworm fly and its reappearance in the US

What to know about the New World screwworm fly and its reappearance in the US Fri 5 Jun 2026 at 1:01pm The New World screwworm fly is threatening the $US113 billion United States cattle industry for the first time in more than a half century, with an infestation from its flesh-eating larvae confirmed in south Texas. The infestation was discovered in a single 3-week-old calf in La Pryor, Texas, about 161 kilometres south-west of San Antonio and 80 kilometres from the US-Mexico border. Federal...

ABC Australia 5d ago

Not to Alarm Anyone, but Flesh-Eating Screwworms Have Entered the US

A case of New World screwworm has been confirmed in South Texas, the US Department of Agriculture announced Wednesday night. It marks the first detected breach of the US-Mexico border by the ravenous flesh-eating flies, which have been making their way up through Central America for the past several years. In a social media post on Wednesday afternoon, the USDA revealed that a sample from Texas had been sent to the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, for...

Wired 5d ago

Screwworms in US: Human risk is low—but they can burrow through your skull

Ravenous, flesh-eating flies have busted through containment barriers and have now reemerged in the US. On Monday and Tuesday, the US Department of Agriculture reported three new cases, bringing the tally to five. One of the cases is in a dog, though it's unclear where it became infected; the dog lives in New Mexico, had its infection reported in Texas, and may have recently traveled to Mexico, where the flies are also spreading.

Ars Technica 1d ago

Food supply 'not at risk' after new Texas screwworm cases, USDA secretary says

The U.S. food supply is "not at risk" from the return of the flesh-eating screwworm parasite to Texas, U.S. Department of Agriculture Secretary Brooke Rollins said on Monday. "This is not a virus, it's not a disease, it's just a little pest, a larva that lands in a calf's wound, for example, and it can be treated," Rollins said in an interview on CNBC's "Squawk Box." "We have boots on the ground … we'll be able to beat this back, but we're going to do everything we can, investing over a...

CNBC 2d ago

CNBC Daily Open: Chips are down — but not for the Dow

Hello, this is Anniek Bao writing to you from Singapore. Welcome to another edition of CNBC's Daily Open. Wall Street had a strong session overnight — if you squint past the Nasdaq.

CNBC 5d ago

The Screwworm Is Messing With America’s Beef

This is an edition of The Atlantic Daily, a newsletter that guides you through the biggest stories of the day, helps you discover new ideas, and recommends the best in culture. The first thing you should know about the New World screwworm is that it isn’t actually a worm; it’s a fly. At the larva stage, it twists into the flesh of its host, devouring it from within.

The Atlantic 18h ago

Flesh-eating screwworm found in Texas cow. Are humans at risk?

Flesh-eating screwworm found in Texas cow. USDA announced the detection of a New World screwworm infection in a cow in Texas, marking the state's first confirmed case in decades. A fly that deposits its parasitic, flesh-eating offspring inside cows has been detected in Texas for the first time in decades, the U.S. Department of Agriculture (USDA) reported Wednesday (June 3).

Live Science 5d ago

Texas governor wants to speed up work on a fly-breeding factory to fight a cattle parasite

Texas governor wants to speed up work on a fly-breeding factory to fight a cattle parasite Andrew Zinin Lead Editor Texas Gov. Greg Abbott expressed concern Friday that a new factory isn't expected to start breeding sterile New World screwworm flies for more than a year as a big part of the effort to stop its flesh-eating larvae from threatening the $113 U.S. billion cattle industry. Abbott pledged Texas will help the U.S. Department of Agriculture accelerate construction of the $750 million...

Phys.org 4d ago