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In the experiment we used the antigen to detect the valence of antibody of 30 days immuned chicken, which is the same antigen with the strains of chicken e.
用与制造菌苗株一致的培养物制备检测抗原，检测30日龄雏鸡免疫后抗体效价，对不同抗体滴度的雏鸡进行了攻毒保护性试验。
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