I remember learning in school about a disease that first developed when humans ate the bodies(particularly in this instance, the brain stem) of their diseased loved ones as a part of a ritualistic practice. The disease can only be transmitted by eating brain stem material, and is zoonotic. I believe it also became an issue in the cattle industry, as cattle were being fed grain that contained matter of other cattle, including brain stems. Foot-and-Mouth disease? I just cant remember. Hope you can help! Thanks!