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近几年来,大水面渔业开发迅猛发展,养殖模式也发生了深刻变化,由过去的粗放养殖逐步发展到施肥半精养,养殖密度也不断提高。大水面原有的生态环境发生了变化,导致湖泊水库水生动物的病害频繁发生,其中寄生虫病和鱼类暴发性出血病的发病率最高,暴发性出血病与寄生虫病的发生密切
In recent years, the rapid development of large-scale surface fisheries, aquaculture mode has undergone profound changes, from the past, the gradual development of extensive farming to fertilize semi-intensive breeding density has also continued to increase. The original ecological environment of the large water surface has changed, leading to the frequent occurrence of aquatic animal diseases in lakes and reservoirs. The incidence of parasitic diseases and fulminant hemorrhagic disease was the highest, and fulminant hemorrhagic disease was closely related to parasitic diseases