[Enzootic cardiomyodistrophy in calves. Observations on some serious episodes]

aetiology calves carestia coeur cuore death diagnosi diagnosis diagnostic escasez de alimentos etiologia etiologie eziologia famine heart ispezione postmortem medicina veterinaria miocarditis mort morte muerte myocardite myocarditis necropsie pathologie pathology patologia postmortem examination selenio selenium sintomi symptome symptoms ternero veau veterinary medicine vitamin e vitamina e vitamine e vitelli