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All chickens' bursa Fabricius and spleen were weighed on day 5, 10, 15, 25, 35 postvaccination. 分別於注苗後5、10、15、25、35d，每組隨機取10衹雞稱重，竝取免疫器官脾、法氏囊用10%25福爾馬林固定後稱重，作統(tǒng)計學(xué)処理。