The southern border was closed to imports of the animals after screwworm, eradicated in the U.S. for decades, had been moving northward in Mexico.

Screwworm parasites primarily infect livestock, but human cases have risen in Central America after the pests escaped ...

U.S. Secretary of Agriculture Brooke Rollins announced risk-based port re-openings for cattle, bison and equines from Mexico ...

Texas officials ramp up efforts against the New World screwworm, launching a response team to safeguard animals and ...

Jun. 1—A small, pale maggot about a half-inch long could cost New Mexico cattle ranchers greatly if it gets back into the country. One of the state's senators introduced new legislation to ...

The detection of the parasitic New World screwworm in Mexico prompts the U.S. to impose livestock import restrictions. Officials warn the outbreak may endanger cattle and wildlife if it goes north.

The New World screwworm was eradicated from the U.S. in 1966, but was detected in Mexico in 2024, concerning leaders that it ...

A threat to American livestock – the New World Screwworm (NWS) fly, which has been considered eradicated from the country since 1966 — has reemerged as a potential danger following an outbreak ...