After discovering a free-ranging deer with bovine tuberculosis, the Department of Agriculture and Rural Development set two “potential high risk areas” in place in the northeast Lower Peninsula. The two locations were set in Presque Isle County and the northwestern section of Montmorency County. The designation means all cattle and bison herds within a 10-mile radius of where the deer was discovered must be tested for bovine TB within six months. If a herd had been tested within the six months leading up to Monday, then the herd does not need to be tested again. Bovine TB is a bacterial disease that can be fatal for cattle, deer and other animals. Michigan has been testing cattle for bovine TB since 1995.