Screwworms won't wipe out Canadian cattle, but extra precautions urged

https://i.cbc.ca/ais/6c877d6a-baf3-4a44-ae6f-3c3a47105909,1780963842804/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C287%2C5500%2C3093%29%3BResize%3D%28620%29" title="FILE PHOTO: A sample of screwworms collected in the morning are displayed at the veterinary clinic as the Mexican government and ranchers struggle to control the spread of this flesh-eating pest, in Tapachula, Chiapas state, Mexico July 4, 2025.

REUTERS/Daniel Becerril/File Photo" width="620" />

Screwworm won't kneecap Canada's beef industry, but an advocate says the parasite's incursion into the U.S. is a good reminder for farmers and ranchers here to take extra precautions.