ニワトリの伝染性喉頭気管炎生ウイルスワクチンに対する免疫応答に及ぼすニューカッスル病及び伝染性気管支炎両生ウイルスワクチンの影響

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  • Influence of newcastle disease and infectious bronchitis live virus vaccines on immune response against infectious laryngotracheitis live virus vaccine in chickens.
  • ニワトリの伝染性喉頭気管炎生ウイルスワクチンに対する免疫応答に及ぼすニューカッスル病及び伝染性気管支炎両性ウイルスワクチンの影響〔英文〕
  • ニワトリ ノ デンセンセイ コウトウ キカンエンセイ ウイルス ワクチン ニ

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Efficacy of infectious laryngotracheitis (ILT) live virus vaccine was determined in combination with Newcastle disease (ND) or infectious bronchitis (IB) live virus vaccine by ocular administration to chickens. As for the ILT and IB vaccines, the efficacy of each vaccine was not altered even if both vaccines were inoculated simultaneously. On the contrary, when ILT vaccine was administered simultaneously or contiguously with ND vaccine to young chickens, the marked suppression was observed in ILT immunization. Significant immunosuppression occurred when ILT vaccine was inoculated during the period between 3 days before and 5 days after vaccination with ND vaccine in chickens younger than 5 weeks of age. It did not occur, however, in chickens older than 7 weeks of age or having antibody against ND virus enough to protect growth of the ND virus. These facts show that careful attention must be paid when ILT and ND live virus vaccines are administered to young chickens.

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