<prompt> Mad Cow disease Spongiform disease occurs due to -CJ virusArena virusKuru virusParvo virus  <response>: prion disease in animals include scrapie,mink encephalopathy,BSE madcow disease.These are caused by slow virus group B. REF:ANANTHANARAYAN AND PANIKERS TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:556,557 