IN recent years, many viruses have been recovered from the alimentary tract of man and the term ‘enteroviruses’ has been proposed1 as a group name for them. The enterovirus group comprises the three strains of poliomyelitis virus, the Coxsackie viruses and the Echo (enteric cytopathogenic human orphan) viruses. The Echoviruses have not yet been conclusively associated with specific clinical conditions and it is not at present possible to determine their exact significance as causes of disease in man. Using tissue culture techniques attempts are being made in this laboratory to determine whether viruses comparable to the human enteroviruses occur in the alimentary tract of pigs.