同时用两种以上具有良好免疫原性的抗原免疫动物时，机体只对其中一种抗原反应较强而对其它抗原反应较弱的现象。
这是由固定和自由的抗原对标记抗体的竞争结合导致的。
This results from the competition between the fixed and free antigen for binding to the labeled antibody.
试剂盒采用原核表达的重组P 30蛋白作为包被抗原，依据竞争ELISA原理检测猪血清中非洲猪瘟病毒的抗体。
The kit adopts prokaryotic expression recombinant P30 protein as coating antigen, and detects the African swine fever virus antibody in pig serum according to a competitive ELISA principle.
这种模型包含了两种竞争，第一种导致了假性标志的出现，这种现象被称为原始抗原变异。
The model includes two forms of competition. The first form leads to a phenomenon known as deceptive imprinting, or original antigenic sin.
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