笔者根据自己工作实践,在没有显微镜的情况下,对具有相同症状的不同鱼病如何进行目检诊断,作一介绍: 一、烂鳃病: 为鱼种至成鱼养殖阶段的主要病害,流行于夏、秋两季。海、淡水鱼类均可发病,对草鱼、青鱼、翘嘴鳜危害最大。引起烂鳃病的病原体有两种,一是细菌,二是寄生虫。两种烂鳃病都具有:食欲减退、离群独游、体色发黑、鳃盖“开天窗”等相同症状。目检主要区别: According to my own work practice, in the absence of a microscope, how to carry out a visual inspection of different fish diseases with the same symptoms, make an introduction: First, rotten gill disease: the main disease of the fish species to the adult fish breeding stage, the epidemic In summer and autumn two seasons. Sea, freshwater fish can be disease, grass carp, herring, Cichlid maximal harm. Cause gill disease pathogens have two kinds, one bacteria, and the second is a parasite. Two kinds of rotten gill disease have: loss of appetite, outlier solitary tour, body color black, gill cover “open skylight” and other symptoms. Visual inspection of the main differences: