动物回归试验，病理变化同自然感染病例。
Animal regression test and pathologic changes were the same as the disease physio infected.
动物回归试验进一步证实了所分离的两株病毒均为BVDV。
The animal regression test also verified that the two virus isolations were BVDV.
首先，采用卵囊形态结构特征观察与回归动物试验相结合的方法，对江苏省高邮市家鹅感染球虫的种类进行了调查与鉴定。
Firstly. Based on the morphology of the oocysts and experimental infection, the coccidial species were investigated and identified from 16 domestic gooseries in Gaoyou-county Jiangsu province.
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