近年来,随着集约化养殖程度的提高,引起水环境恶化,加上养殖密度大,饲料投喂过度,用药不当,造成鱼类免疫力下降,鱼病增多,死鱼现象时有发生,特别是最近出现的鲤鱼暴发性出血病,死亡率高,流行快,不易治疗,给渔业生产造成严重损失,已成为沿黄地区主要暴发性鱼病,引起水产同行的高度重视。1发病原因 In recent years, with the intensification of intensive farming, causing the deterioration of the water environment, coupled with the breeding density, over-fed feed, improper medication, resulting in reduced immunity to fish, fish disease increased, the phenomenon of dead fish have occurred, especially It is the most frequent outbreak of common carp. It has a high mortality rate, rapid epidemic and is not easy to treat. It has caused serious losses to fishery production and has become a major outbreak of fish disease along the Yellow River. It has drawn great attention from aquaculture counterparts. 1 the cause of the disease