如今,随着环境问题的日益严重,水产业的病种在增多,病原的致病能力在增强,抗药性也在增强。为了有效控制、防治鱼病,使生产得以正常进行,就要投药,这更加重了环境的恶化。另外,从外省、市及国外引进的苗种、设备、物资又常常携带病原。鱼作为人类“菜篮子”的重要组成部 Nowadays, with the worsening of environmental problems, the number of aquatic diseases is on the rise, the pathogenicity of pathogenic bacteria is increasing, and the resistance is also increasing. In order to effectively control, prevent and cure fish diseases so that production can be carried out normally, it is necessary to invest drugs, which adds more to the deterioration of the environment. In addition, the introduction of seedlings from other provinces, municipalities and foreign countries, equipment, supplies and often carry the pathogen. Fish as a human “basket” an important part