Infectious bursal disease virus ( IBDV ) is an important pathogenic agent of chicken.
传染性法氏囊 病毒是鸡的一种重要的病原.
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The distribution and histology of lymphoid tissue in the Fabricius'bursal stalk were studied.
研究了番鸭法氏囊柄部淋巴组织的分布及组织学结构.
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