鱼类暴发性出血病(细菌性败血症)是近几年来新出现的流行病,无论是池塘、湖泊、水库都有发生,流行地区广、季节长,发病死亡率高,是淡水养殖业危害最为严重的病害之一。 (一)流行季节与危害 从2月底至11月份,尤以水温为28℃左右发病最为严重。危害的淡水鱼类有鲫、鳊、鲢、 Outbreaks of fish disease (bacterial septicemia) are emerging epidemics in recent years. Both ponds, lakes and reservoirs have occurred. The epidemic area is wide, the season is long, and the morbidity and mortality are high. It is most harmful to freshwater aquaculture One of the serious diseases. (A) of the epidemic season and hazards from the end of February to November, especially in the water temperature of 28 ℃ or so the incidence of the most serious. Hazardous freshwater fish crucian carp, 鳊, silver carp,