A Survey on Neutralizing Antibody against Akabane Virus in Cattle in Hiroshima

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  • YAMASHITA HIDEYUKI
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • NODA MASAHIRO
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • MIYAMOTO MORITO
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • NAKANISHI EIZOU
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • SENDA HIROFUMI
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • IDA KOUJI
    Higashi Hiroshima Livestock Hygiene Service Center, Prefecture of Hiroshima
  • HATAKEYAMA HIDEO
    農林水産省家畜衛生試験場

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Other Title
  • 広島県における牛異常産の発生とアカバネウイルスに対する中和抗体の変動
  • 広島県における牛異常産の発生とアカバネウィルスに対する中和抗体の変動
  • ヒロシマケン ニ オケル ウシ イジョウサン ノ ハッセイ ト アカバネ ウィ

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Abstract

A survey on neutralizing antibody against Akabane virus was conducted on a total of 11, 574 nonvaccinated cattle in Hiroshima Prefecture over a period from 1972 to 1985.<BR>Positive rate of Akabane antibody was 81% in 1973, 71% in 1975, 46% in 1976, 45% in 1977, 74% in 1978, 68% in 1979, 62% in 1980, 52% in 1981, 50% in 1982, 57% in 1983, 52% in 1984, and 83% in 1985.<BR>A change in antibody positive rate to over 71 % was observed in years when the positive rate of Akabane antibody was reduced to 45% to 52%.<BR>An increase in positive rate to over 48% was recognized in a cycle of 2-4 years, where as that to over 63% was in a cycle of 5-7 years.<BR>An increase in Akabane antibody-positive cattle started in August to November in each year. The highest rate was recognized in September. Among mother cows of calves with the abortion-arthrogryposis-hydroencephaly syndrome, the antibody-positive rate was 87% in 1972, 1973, and 1977.<BR>Anti-Akabane antibody was found in precolostral serum in 33%(3/9) of the normal calves in 1977.

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