No, it is not, Mike Overton, dairy scientist at the University of Georgia, told an audience at the American Dairy Science Association annual meeting in July. It may just seem like an emerging disease, due to increased observations. The first case of mycoplasma was actually reported in the 1960s, he said. Introducing new animals into the herd is the most common source of new infections.
Overton suggests using bulk-tank cultures as an ongoing screening tool for mycoplasma. If you find the organism in bulk-tank cultures, then narrow down the list of cows that may be contributing to the problem and focus your culturing strategy on them. He also suggests culturing all fresh cows, since this is when organisms are often shed.