草鱼作为传统优良淡水养殖品种,一直深受北方地区鱼农欢迎,并被广泛推广养殖。其常见病较多,其中肠炎病、赤皮病和烂鳃病是危害草鱼的主要疾病,通常称为草鱼“三病”。全年均可发病,且流行范围广、发病率高、危害性大,应严加防范。1肠炎病1.1病原体为肠型点状气单胞菌(Aromonas Grass carp as a traditional fine freshwater aquaculture species, has been welcomed by fish farmers in the north, and was widely promoted breeding. The more common diseases, including enteritis, red skin disease and rotten gill disease is the main disease of grass carp, commonly known as grass carp “three diseases.” The disease can occur throughout the year, and a wide range of epidemic, the incidence rate is high, harmfulness should be strictly prevented. 1 Enteritis Disease 1.1 The pathogen is Enterobacter aerogenes (Aromonas