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Brucellosis/Montana's Designated Surveillance Area (DSA)

DSA Regulations

DSA Boundaries 

Boundary Adjustment Proposal

Testing Reimbursement Forms

Additional Information


DSA Regulations

    DSA Regulations (ARM)

    Quick Reference Card


Brucellosis (Bangs) Vaccination:

All female cattle and domestic bison 4 months of age or older within Beaverhead, Gallatin, Madison and Park Counties must be official brucellosis vaccinates by January 1 of every calendar year.

For example, female cattle born before September of 2012 must be bangs vaccinated by January 1 of 2013.

Brucellosis Testing (Bleeding):

All cattle and domestic bison must be tested for brucellosis within 30 days prior to change of ownership or movement out of the DSA if they are:
  • Sexually intact and 12 months of age or older
  • Any age intended to be used for breeding purposes
  • Exceptions:
    • No test is required to take animals to an approved Montana livestock market that will test on arrival.
    • A test completed July 16 or after is acceptable for movement out of the DSA or change of ownership through February 15 the following year.
  • Other exceptions may be available with a herd plan (call MDOL at 406-444-2043).

Identification and Disease Traceability:

All sexually intact cattle and domestic bison (regardless of age) leaving the DSA must be officially identified.

Official individual identification tags include:

  • Electronic Identification Device (EID) tags (also known as RFID tags);
  • Orange brucellosis (metal or RFID) vaccination tags on officially brucellosis vaccinated females;
  • Silver metal "Brite" tags (available to producers at no charge from the MDOL or USDA-APHIS office);
  • Some "age-source" program tags qualify as individual identification.

DSA Boundaries

Current DSA Boundaries

Boundary Adjustment Proposal (click here to view proposal)

In the fourth year of the elk surveillance study, elk were tested in the Tobacco Roots and in the Blacks Ford area (south of the interstate between Belgrade and Three Forks). 
While Tobacco Roots samples were all negative, 10 of 60 samples tested positive in HD 311 (Blacks Ford and Red Mountain areas).  MDOL is proposing to adjust the boundary of the DSA to include this area (see map below). 

MDOL has identified 50 landowners with approximately 12,000 cattle within the newly proposed adjustment area.

The proposal will be open for public comment until July 10, 2014.


Testing Reimbursement Forms


Additional Information