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通过人工投喂感染试验，观察了中国对虾感染暴发性流行病病原后出现的特殊外观病症，即与健康是截然不同的空胃和拒食。在现场利用这种外观症状作排外诊断和鉴别诊断，可以简便、快速地判断出池虾群体中有无病虾，同时根据统计发病虾的概率，也可以了解群体的发病进程。
Through the artificial feeding infection test, we observed the special appearance disorder appeared after the pathogen of the epidemic outbreak of P. shrimp in China, that is to say, the empty stomach and the antifeedant are very different from the health. The use of this appearance of symptoms in the field for exclusive diagnosis and differential diagnosis, you can easily and quickly determine whether there is no pool of shrimp in shrimp, and according to the probability of incidence of shrimp, but also to understand the process of group incidence.