Screwworm
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First US screwworm case in 60 years: Should America be worried?
First US screwworm case in 60 years: Should America be worried? The US Department of Agriculture says New World screwworm has been detected in a Texas calf. The New World screwworm, a flesh‑eating parasite which infects cattle and other warm‑blooded animals, has been found in a calf in Texas, the US Department of Agriculture announced on Wednesday.
Officials worried about New World screwworm fly infestation threatening cattle industry
Officials worried about New World screwworm fly infestation threatening cattle industry While an untreated screwworm infestation can be fatal to an animal, federal and state officials have been quick to emphasize that the larvae, which feed on living tissue, do not infest meat or fruit - Bookmark Texas Gov. Greg Abbott has voiced significant concern over delays in constructing a new facility crucial for combating the New World screwworm fly, whose flesh-eating larvae pose a renewed threat to...
The U.S. fought the flesh-eating screwworm for decades. Now it must begin again.
The United States spent more than half a century and hundreds of millions of dollars driving the flesh-eating New World screwworm as far from its borders as possible. The species can eat the tissue of any warm-blooded animal, but it’s a particular threat to livestock and is often fatal for cattle. Some environmentally minded bioethicists have openly debated whether it would be moral to deliberately drive the screwworm into extinction.
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).
The US Has a Plan to Combat Screwworm. It Involves a Lot More Flies
A flesh-eating parasitic fly that poses a major threat to livestock has returned to the United States after 60 years. This week, the US Department of Agriculture confirmed the presence of New World screwworm in a calf in southern Texas. Eliminated in the US in 1966 and as far south as Panama by 2006, its recent reemergence in Mexico made it likely that the screwworm would eventually enter the country again, with modeling showing that it could arrive as soon as summer 2025.
Screwworm fly detected in Texas decades after cattle threat was largely eradicated in US
Screwworm fly detected in Texas decades after cattle threat was largely eradicated in US Andrew Zinin Lead Editor The New World screwworm fly has reached south Texas, the U.S. Department of Agriculture confirmed Wednesday, the first time in decades that the parasite with flesh-eating larvae has threatened the nation's cattle industry and only the third time it's appeared in the U.S. in that time. Agriculture Secretary Brooke Rollins said the case was in a 3-week-old calf in LaPryor, Texas,...
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...
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...
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.
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...