State officials have announced another milestone in the fight to eliminate bovine tuberculosis from northwestern Minnesota.

The vast majority of the state was upgraded to TB-free status.

Portions of four counties - Roseau, Lake of the Woods, Marshall, and Beltrami - remain subject to closer scrutiny. Some of that zone was upgraded Friday to a level that drops or reduces testing requirements and movement rules for cattle producers.

However, producers in a small area of those four counties remain subject to the same testing, movement and fencing requirements as before.

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