The New World screwworm flies lay their eggs in wounds, noses, ears, eyes or mouths. Their eggs develop into parasitic larvae ...

USDA denies New World screwworm in US after rumors trigger cattle market selloff Friday with cash trade holding steady.

Secretary of Agriculture Brooke Rollins announces launch of New World Screwworm Grand Challenge to stop northward spread.

The New World screwworm is getting dangerously close to the U.S., public health officials warn. If left untreated, a ...

The new world screwworm once caused widespread devastation to livestock in the United States, prompting a decades-long ...

Texas ranchers and those in the cattle industry are on high alert as more cases of New World screwworm infestations are reported close to the Texas-Mexico border. The parasitic blowflies attack and ...

On January 21, 2026, U.S. Secretary of Agriculture Brooke Rollins announced the launch of the New World Screwworm (NWS) Grand ...

A recent surge in New World screwworm (NWS) infestations near Mexico’s northern border is causing concern in Texas.

Texas Agriculture Commissioner Sid Miller today issued a statement following a confirmation by Mexico’s animal health ...

The latest screwworm cases in Mexico bring more discussion about legal—and illegal—Latin American cattle trade.

It’s just plain cowboy logic — when you’re seeing this many cases this fast, it tells you there may be established screwworm ...

More cases of New World screwworm have been found in a Mexican border state.