ラクノウ (Rakuno) is a term that refers to a type of disease known as "bovine spongiform encephalopathy" (BSE), commonly associated with cattle. It is a neurodegenerative condition caused by prions, which are misfolded proteins that lead to brain damage. The disease can affect the health of cattle and poses risks to the food supply. The term is also linked to the broader category of prion diseases, which can affect various animals, including humans. In humans, a related condition is known as クロイツフェルト・ヤコブ病 (Creutzfeldt-Jakob disease). Preventive measures are essential to control the spread of this disease in livestock and ensure food safety.