Congenital Scoliosis of Calves Suspected of Aino Virus Infection

Authors:
  • KIKazuki Ishibashi
    Kazuki Ishibashi
  • YTYoshifumi Tomishita
    Yoshifumi Tomishita
  • HSHitomi Shirakawa
    Hitomi Shirakawa
  • MTMasaharu Takaya
    Masaharu Takaya
  • AWAkira Watanabe
    Akira Watanabe
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Abstract
Eleven cases of congenital scoliosis in calves were observed from October 1988 to March 1992 in Fukuoka Prefecture, and Neutralizing antibody to Aino virus was detected in sera from the nine precolostral and two post colostral calves. Nine of the eleven cases showed arthrogryposis, while five and two hydrocephalus and cerebellar hypoplasia, respectively. Non-suppurative encephalomyelitis and regressive changes in the skeletal muscles were seen histopathologically. Serological survey using sentinel calves disclosed that epizootics of Aino virus had occurred during August to October, in 1988 and 1990.