<prompt> Mad cow disease is due toSlow virusMycoplasmaBacteriaFungus  <response>: Mad cow disease or bovine spongiform encephalopathy i.e. Caused by prionsPRIONS are unconventional transmissible agents, proteinaceous in nature.Diseases caused by prions areKuruCreutzfeldt Jakob Disease.Gerstmann Straussler Scheinker SyndromeFatal Familial Insomnia.Scrapie Of SheepTransmissible Encephalopathy of Mink.Bovine Spongiform Encephalopathy Mad Cow Disease 