USDA downgrades NM's bovine TB-free status New Mexico has lost its status as a bovine tuberculosis-free state, a decision state officials say is excessive and could cost ranching and dairy operations unnecessary tests. The U.S. Department of Agriculture, in a notice published in Thursday's Federal Register, said that because two infected herds had been found in New Mexico's accredited free-zone since May 2007, it no longer met federal requirements and the state had to be downgraded. "This action is necessary to reduce the likelihood of the spread of bovine tuberculosis within the United States," the notice said. Officials had expected the decision, which requires that certain cattle be tested before being moved from New Mexico. The modified accredited advanced designation means breeding cattle 6 months old or older that are leaving the state have to test negative for bovine TB before they can be shipped outside New Mexico's borders, Culbertson said. Cattle meant to be slaughtered for food are not subject to testing, Culbertson said. That means animals going to feedlots or pastures outside the state and destined for the food chain won't have to be tested, he said....