The Minnesota Board of Animal Health Tuesday announced that a Beltrami County beef cattle herd has tested positive for bovine tuberculosis, the fourth positive herd detected since October 2007. The board said it will likely result in the downgrade of Minnesota's bovine TB status from Modified Accredited Advanced to Modified Accredited as required by the U.S. Department of Agriculture Code of Federal Regulations. Since TB was discovered in a northwest Minnesota beef cattle herd in July 2005, the disease investigation has found 11 infected herds, all in Roseau and Beltrami counties. USDA regulations prescribe a downgrade in status when more than three herds are discovered within a 12-month period.
When the status downgrade becomes official, Minnesota cattle producers will have to adhere to stricter federal and state testing requirements when shipping cattle or bison. USDA requires all breeding animals to be tested for bovine TB within 60 days prior to shipment and a whole herd test within the previous 12 months. All feeder animals must have a TB test prior to movement. Cattle and bison moving interstate to a federally inspected slaughter facility are exempt from the testing requirement.