How long has MCF been in North America?
As far as is known, the disease has been present for hundreds of years. However, it has been recognized as a defined disease only within the past 80 years or so in the U.S. Reports of an MCF-Iike disease in cattle in North America appeared as early as the 1920s. The first well-documented case of MCF in bison occurred in South Dakota in 1973 and was reported in the scientific literature in 1977.
