Summary
A field outbreak in pigs of a disease with paresis and paralysis is described. The observation of non-suppurative encephalomyelitis and negative bacteriological findings indicated a virus disease. From the intestine and the central nervous system of the sick pigs an agent that had the properties of an enterovirus was isolated. By means of cross-neutralization it was shown to be related to or identical with the Talfan serotype.
Strain U 6, isolated from a herd free from clinical disease, was also proved to belong to the Talfan serotype. By oral or intracerebral inoculation in piglets that had been raised without colostrum, it was shown to have weak pathogenic activity.
Results of serological examinations and isolation of the Talfan agent from several herds of healthy pigs in different parts of the country indicate that the Talfan virus has a considerable distribution in Sweden.
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Aided by grants from the Eoyal Academy of Agriculture, Hästexport-medelsfonden, Stockholm.
I am indebted to the veterinary colleague at Östhammar, Åke Ginman, for drawing my attention to the outbreak.
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Sibalin, M. Confirmation of the presence of the Talfan disease in swedish pigs. Archiv f Virusforschung 12, 76–88 (1963). https://doi.org/10.1007/BF01258757
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DOI: https://doi.org/10.1007/BF01258757