草鱼是中原地区主要养殖品种之一,一直受到消费者的喜爱,市场价格稳定,生长快,养殖成本低,养殖前景好。但养殖户在养殖过程中,最主要的问题是草鱼的病害防治,尽管采取了定期或不定期的预防措施,但草鱼病害经常发生,特别是阴雨绵绵,雨水较多的年份发病率更高。目前,草鱼病毒性出血病几乎是无特效药可治,草鱼“老三病”往往与出血病和肝胆综合症并发,治疗效果甚微。免疫防病是目前防治“老三病”、尤其是病毒性出血病唯一的有效方 Grass carp is one of the main breeding species in Central China. It has always been favored by consumers. Its market price is stable, its growth speed is fast, breeding cost is low and its breeding prospect is good. However, the main problem for farmers during the breeding process is the prevention and control of grass carp diseases. Grass carp diseases often occur despite frequent or irregular preventive measures, especially in rainy and rainy years. At present, the grass carp virus hemorrhage almost no cure, Grass carp “third wife disease” often with hemorrhagic disease and hepatobiliary syndrome complicated with little effect. Immune disease prevention is the current prevention and treatment of “third trimester”, especially the only effective viral hemorrhagic disease