近年来,淡水鱼类的出血病多为细菌性出血病,是流行地区最广、流行季节最长、危害的鱼种类最多、造成的损失最大、死亡率最高的一种急性传染疾病,涉及的鱼类有鲤、鲫、草鱼、鲢、鳙等多种淡水鱼类。流行季节几乎一年四季皆可发生,重病鱼池可以导致“全军覆没”,近两年该病在我地区发生的尤为严重。 In recent years, freshwater fish are mostly hemorrhagic disease of bacterial hemorrhagic disease, is the most widely endemic area, the longest season, the most harmful species of fish, causing the greatest loss, the highest mortality rate of an acute infectious disease, involving Fish carp, crucian carp, grass carp, silver carp, pomfret and other freshwater fish. The epidemic season can occur almost all year round. Severe fish ponds can lead to “annihilated all forces” and the disease has been particularly serious in our region in the past two years.