疾病的预防工作是搞好水产养殖生产的重要措施之一。由于鱼类生活在水中,鱼类生病不易及时发现和正确诊断,即使发现鱼病并立即采取治疗措施也难以立即奏效。这是由于鱼类患病初期,基本上无明显病症,当发现病症时,病情已较为严重,基本上失去了食欲,即使有特效药物,也很难达? Disease prevention is one of the important measures to improve aquaculture production. Because fish live in water, it is not easy for fish to find and diagnose them in time. Even if the fish disease is found and the treatment is taken immediately, it will be hard to work immediately. This is due to the initial stage of fish disease, basically no obvious illness, when found illness, the condition has been more serious, basically lost appetite, even with special effects drugs, it is difficult to reach?