Studies on Swine Enteroviruses

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  • KADOI Katuyuki
    College of Agriculture and Veterinary Medicine, Nihon University National Institule of Animal Health
  • KOBORI Susumu
    College of Agriculture and Veterinary Medicine, Nihon University National Institule of Animal Health
  • MORIMOTO Tomiaki
    College of Agriculture and Veterinary Medicine, Nihon University National Institule of Animal Health

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  • Studies on swine enteroviruses;Japanese 6th serotype and relationship between heat susceptibility and cytopathic effects
  • Japanese 6th Serotype and Relationship between Heat Susceptibility and Cytopathic Effects

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Abstract

Of 38 new isolates of enterovirus recovered from fecal specimens of Japanese pigs, 14 isolates were found to be strains of a new serotype (represented by strain IPI) distinct from the five serotypes of swine enterovirus hitherto recognized in Japan. The re-maining isolates included serotypes Teschen, T80, SF1 and V13. The two different types of cytopathic effect, which have been recently recognized in swine kidney cell cultures, were also observed with our isolates; type I is characterized by a rounding of cells followed by aggregation and destruction of affected cells, and type II by granulation and degradation of cells with poor clumping of affected cells. Of interest is the finding that the type I strains possess a higher heat stability than the type II strains when heated at 50 C for one hr.

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