USABLE UNTIL JAN. 12, 2026
A worker handles a tray with Mediterranean fruit flies inside a bio-factory as Mexico's government reconditions a plant to a new sterile screwworm fly facility, part of the country's effort to eradicate the flesh-eating parasite that threatens its livestock industry and raises tensions with the United States, in Metapa de Dominguez, Mexico, Oct. 17, 2025. Photo: Daniel Becerril/Reuters

Canada too cold for New World screwworm

Cattle producers still need to be mindful of the tropical pathogen as Texas braces for outbreak

New World screwworm is closing in on the U.S. from Mexico, but the deadly livestock parasite isn’t likely to dig a surviving population in Canada, even if the fly species sneaks over the border.


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