一、肠出血草鱼出血病与细菌性肠炎两者早期外观症状极为相似,病鱼体色发黑,体表轻微充血或出血,离群独游,游动缓慢,食欲减退,剖开鱼腹,两者均见肠壁充血。不同之处在于活检时前者肠壁弹性较好,肠腔内黏液较少,镜检可见肠腔内有大量红细胞及成片脱落的上皮细胞;而后者肠壁弹性较差,肠腔内黏 First, intestinal bleeding Bleeding grass carp and bacterial enteritis early appearance of both symptoms are very similar, diseased fish body color black, mild congestion or bleeding on the surface, outlier solitary tour, slow swimming, loss of appetite, cut open the belly, Both see the intestinal wall congestion. The difference is that when the former biopsy better wall elasticity, less mucus in the intestine, microscopic examination revealed a large number of red blood cells in the intestine and into the shedding of epithelial cells; while the latter intestinal wall elasticity is poor, intestinal lumen sticky