...键词：规模猪场；猪瘟；免疫失败；免疫程序 [gap=1367]Keywords:large-scale pig farm；classical swine fever；immune failure；immunity procedure ...
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乙肝病毒基本变异也是免疫失败的一个原因。
The basic variant of hepatitis B virus is one of the reasons for immunization failure.
18名病人没有足够数量的抗体，免疫失败。
经调查分析发现，造成免疫失败的主要原因是雏鸡母源抗体水平低。
The main causes of immunity failure were discovered that lower mother's antibody of chick by investigating and analysing.
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