[Synthetical report of an international roundtable on bovine spongiform encephalopathy]

bovin bovini cattle disease surveys disease transmission encefalite encefalitis encephalitis encuestas sanitarias epidemiologia epidemiologie epidemiology ganado bovino gran bretagna great britain in vivo experimentation indagini sulle malattie ovin ovini ovinos sheep sperimentazione in vivo transmission des maladies trasmissione delle malattie usa virose viroses virosi virosis