BSE is due to an infection by a misfolded protein, known as a prion. Cattle are believed to have been infected by being feed meat - and - bone meal (MBM) that contained the remains of other cattle who spontaneously developed the disease or scrapie - infected sheep products. The outbreak increased throughout the United Kingdom due to the practice of feeding meat - and - bone meal to young calves of dairy cows. Cases are suspected based on symptoms and confirmed by examination of the brain. Cases are classified as classic or atypical, with the latter divided into H - and L types.
where did the mad cow disease come from
an infection by a misfolded protein, known as a prion