"Overview: On June 9, 2025, culture testing by the CFIA Ottawa Laboratory Fallowfield found Mycobacterium tuberculosis complex in tissues collected from a 7-year-old cow at a federally registered slaughter facility in Manitoba. On June 13, 2025, the presence of Mycobacterium bovis (M. bovis) was confirmed.

Working with the information in the DairyTrace system, the CFIA identified a herd in Manitoba as the herd of origin of the infected animal. This herd has been placed under quarantine until testing and depopulation can be completed.

The timing of testing will be determined after discussions with the producer to manage the operational impact of the process.

The CFIA is continuing to work closely with producers, industry associations, and provincial and federal agricultural and health authorities throughout the investigation.

An investigation of this detection will support international market access for Canada's dairy and beef sectors."