New York
The screwworm, a flesh-eating parasite and longtime foe of American ranchers, is back in US cattle after decades.
The US Department of Agriculture confirmed at the very least three contaminated cattle Texas this week. The beef trade has already been grappling with the smallest cattle herd in 75 years because of extended droughts.
Those smaller herds have helped drive retail beef prices to a report $9.64 per pound in April, up 13% from the earlier yr, in keeping with USDA information.
With solely a handful of circumstances up to now, it’s too quickly to inform if prices will leap extra due to the parasite. Instead, consultants say screwworm circumstances will possible preserve current prices elevated for grocery buyers. “It just makes it a longer timeline before the cattle industry will really start to rebuild,” Tom Johnston, editor-in-chief of commerce publication Meatingplace, informed NCS.
Grocery buyers might get hit with greater prices if the screwworm circumstances flip right into a full-blown outbreak. That might price $3 billion throughout the Southwest, in keeping with a report by the Federal Reserve Bank of Dallas.
But the cattle trade isn’t there but. And within the brief time period, shoppers are unlikely to see an enormous change in beef prices.
“This will be a burden on cattle producers, but it is one where there’s light at the end of the tunnel,” Todd Thrift, a beef sciences professor on the University of Florida, informed NCS.
Even if a potential outbreak pushes up prices, the modifications can be incremental moderately than a sudden leap like the worth of eggs throughout the fowl flu outbreak.
Screwworm would enhance labor and medication prices for ranchers, David Anderson, an agriculture economist at Texas A&M University, informed NCS.
Though screwworm doesn’t unfold from animal-to-animal like a virus, feminine grownup flies lay eggs in contemporary wounds of warm-blooded animals. Those larvae feed on the hosts and may trigger bacterial infections or loss of life.
An outbreak would additionally pile stress onto an already tough occupation.
“That has a significant not only financial burden but also just a mental toll on those cattle producers,” Colin Woodall, CEO of lobbying group the National Cattlemen’s Beef Association, stated.
This isn’t the cattle trade’s first rodeo with the screwworm. The New World screwworm fly has been the bane of existence for US cattle ranchers since at the very least the Thirties. In the Fifties, scientists found out they may sterilize flies to overwhelm the native fertile fly inhabitants, stopping females from reproducing.
Cattle producers in affected states misplaced as much as $50 million to $100 million per yr earlier than full eradication within the ‘60s, in keeping with a 2025 analysis from USDA.
But circumstances have surged in Central America since 2023, and the fly has lately made its manner as much as Texas from Mexico. In May 2025, USDA Secretary Brooke Rollins announced the border would near livestock imports from Mexico as a result of rise of screwworm circumstances.
But that border closure additionally contributed to greater beef prices previously yr, Anderson stated. In Texas, feedlots where Mexican cows had been fattened up had been hit exhausting, and that additionally affected beef provide within the United States.
The query isn’t whether or not the flies will be contained however how shortly.
USDA broke ground on a facility to mass produce sterile screwworm flies in Texas in April, with manufacturing anticipated to begin in November 2027. It additionally invested tens of millions into modernizing a facility in Mexico, which is predicted to reopen this summer season. USDA has additionally been bringing in 100 million sterile flies per week from a facility in Panama.
The division additionally stated it sought approval from the US Environmental Protection Agency to launch NovoFly, a genetically modified male-only sterile fly that may double capability.
“It’s the technology that we used to win the battle in the 60s, and it will definitely help again,” Woodall stated.
NCS’s Jen Christensen contributed to this report.