©2018 WebMD, Inc. All rights reserved. eMedicineHealth does not provide medical advice, diagnosis or treatment. See Additional Information.

Mad Cow Disease in California Topic Guide

Mad Cow Disease in California Mad Cow Disease in California: Mad cow disease is variant Creutzfeldt-Jakob disease when it transmits to humans via ingestion of cow central nervous system tissue. The disease can cause dementia, memory loss, and personality changes. The cause is a microscopic, foreign protein called a prion, which is distinct entity from viruses and bacteria.