By eHow Arts & Entertainment Editor
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Mad cow disease is incurable and a fatal brain disease that affects cattle, goats and sheep. This disease affects their nervous system, causing the animal to act strange and unsteady, nervous, aggressive, and have a loss in body weight despite continued appetite. The medical name for this disease is bovine spongiform encephalopathy or BSE. There is a link between BSE in cows and a rare brain condition affecting people called variant Creutzfeldt-Jakob disease (CJD).