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New Weapon Against Flesh-Eating Livestock Parasite as it Spreads Beyond Texas

Officials work at the State Operations Center during Texas’ response to the New World Screwworm in Austin.
Officials work at the State Operations Center during Texas’ response to the New World Screwworm in Austin.

Researchers have developed a new innovation against screwworm known as the Novo Fly, a genetically advanced, all-male sterile strain of the New World Screwworm at a newly-opened research lab in Texas.

The U.S. Department of Agriculture (USDA) has now confirmed three more cases of the flesh-eating parasite known as the New World Screwworm that’s made it across the U.S./mexico border, making 7 cases overall. That includes one case in New Mexico involving a dog.
The news comes just as Brian Kirkpatrick with Texas Public Radio got a look inside the Knipling-Bushland U.S. Livestock Insects Research laboratory, which just opened in May. The lab was named for the researchers who developed the sterile insect technique to slow or stop the spread of screwworm in the 1940s and 50s.

The first reported case of New World Screwworm in the United States occurred June 3, 2026. Since then, the U.S. has recorded 7 cases in two states in domestic animals and 0 in wildlife.
The first reported case of New World Screwworm in the United States occurred June 3, 2026. Since then, the U.S. has recorded 7 cases in two states in domestic animals and 0 in wildlife.

Tens of millions of sterile flies have been released to interfere with screwworm reproduction in past decades. The USDA's Undersecretary for Research, Scott Hutchins, says they have a new fly that grew out of the work of those researchers. "We refer to it as the Novo Fly. Novo is Latin for new and it's the root for innovate. And this particular innovation is exactly that.”
Hutchins explained what makes the Novo Fly such an advancement. “It's going to allow us to almost instantaneously double the number of flies, sterile flies, that we put in the fight because it's going to allow us to produce only male sterile flies." Officials with the Agriculture Research Service are also working to develop an odor that specifically attracts screwworm female flies. Such an odor can be used to lure the females and eradicate them.

And development continues on precise computer modeling on the fly and its movement using A-I. Such modeling helps determine where sterile flies should be dropped into the wild.

Originally from the Pacific Northwest, and a graduate of the University of Washington, Jeff began his on-air broadcasting career 35 years ago in the Black Hills of South Dakota as a general assignment reporter.
Brian Kirkpatrick has been a journalist in Texas most of his life, covering San Antonio news since 1993, including the deadly October 1998 flooding, the arrival of the Toyota plant in 2003, and the base closure and realignments in 2005.