Alfredo Chavez, a cattle rancher and livestock technician, shows New World screwworm larvae removed from a cow at his ranch ...

The United States and Mexico plan to reopen the U.S. border to Mexican cattle imports in July. U.S. agriculture officials had suspended imports in May due to concerns over the screwworm parasite ...

The New World screwworm is a fly larva that infests the living tissue of warm-blooded animals, including humans, that causes ...

The parasitic fly that attacks warm-blooded animals was eliminated from the United States in the 1960s, but it’s creeping ...

Calls for tougher actions to halt cattle trafficking are growing amid concerns over the spread of the screwworm parasite in ...

Researchers pushed screwworms out of Texas by the 1970s. Now that they are on their way back, agriculture leaders and ...

The reemergence of the New World screwworm, which poses significant health risks for livestock, has prompted the Department of Agriculture to halt cattle shipments from Mexico to the United States.

The U.S. has again halted livestock imports from Mexico after the parasitic New World screwworm fly closer to the border.  Earlier this week, Mexico's national agriculture department reported ...

A deadly maggot that was thought to have been eradicated is making a comeback, threatening Texas’ livestock. The New World ...

Livestock trade with Mexico to resume after screwworm health scare, announced the USDA. Santa Teresa port to allow livestock transportation by July 21.

The USDA expects a new screwworm fly factory to be up and running in southern Mexico by July 2026. It plans to open a fly distribution center in southern Texas by the end of the year so that it ...

Berdegué said the number of flies dispersed in Mexico has reached 100 million a week. Screwworm flies lay their eggs on live animals, and the larvae burrow into the flesh of the host.