mad cow disease on white paper

mad cow disease white paper bovine spongiform encephalopathy bse prion variant creutzfeldt-jakob vcjd cattle neurological disorder transmissible tse beef industry concerns outbreak animal health risk infection cjd transmission epidemic contamination prion-contaminated meat feed safety zoonotic surveillance disorders livestock infectious proteins testing measures crisis food risks control protein misfolding contaminated research public prevention cases production pathogenesis regulations quality assurance eradication policies management consumption programs foodborne pathogens assessment