Infectious bursal disease virus ( IBDV ) is an important pathogenic agent of chicken.
傳染性法氏囊 病毒是雞的一種重要的病原.
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The distribution and histology of lymphoid tissue in the Fabricius'bursal stalk were studied.
研究了番鴨法氏囊柄部淋巴組織的分布及組織學(xué)結(jié)構(gòu).
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