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一、鱼类出血症的原因淡水鱼类出血症多属细菌感染所致,是流行地区最广、流行季节最长、危害鱼种类最多、造成的损失最大、死亡率最高的一种急性传染病。涉及种类有鲤鱼、鲫鱼、团头鲂、鲢鱼、鳙鱼、鳊鱼、草鱼等。流行季节从2月底至11月底,水温在28℃左右发病最为严重。发病严重时死亡率可达100%。引起出血症的病原主要有鲁可氏耶尔森氏菌、嗜水气单胞菌和弧菌三种,感染这几种病原的主要是因为池塘淤泥过厚,并且消毒不到位造成。在池塘淤泥中含有很多致病细菌,当池塘水温上升时,水中的有机质分解加快,水质恶化的速度增加,从而使鱼类感染此病的机率加大。
First, the reasons for fish hemorrhagic disease Most freshwater fish hemorrhagic disease caused by bacterial infection, is the most popular epidemic region, the longest season, the most dangerous species of fish, causing the greatest loss, the highest mortality rate of an acute infectious disease . Types of carp, crucian carp, bream, silver carp, bighead carp, bighead carp, grass carp and so on. Popular season from the end of February to the end of November, the water temperature at about 28 ℃ incidence of the most serious. Serious deaths up to 100%. The main cause of bleeding disorders are Yersinia ruckeri, Aeromonas hydrophila and Vibrio three infection of these pathogens is mainly due to too thick pond sludge, and disinfection is not in place. In the pond sludge contains a lot of pathogenic bacteria, when the pond water temperature rises, the decomposition of the organic matter in the water accelerates, the rate of deterioration of water quality increases, making the fish the greater the chance of infection of the disease.