1.选药“四注意”(1)注意详查病因。选择用药前,要请专业人员详细诊断病因。鱼病发生的原因很多,总的来说,有病原、寄主、环境三种主要因素,三个因素相互作用失去平衡,就会引起鱼类发病。要想达到治病的目的,首先应该分析、研究其病因,才能不致贻误病情,及时诊治。(2)注意合理选药。要选择使用经 1. Select medicine “four attention ” (1) pay attention to the etiology. Select the medication, to ask professionals to diagnose the cause in detail. Fish diseases occur for many reasons, in general, there are three main factors of the pathogen, host and environment, the imbalance of the interaction of the three factors, it will lead to fish disease. To achieve the purpose of treatment, we should first analyze and study the etiology, in order not to delaying the disease, timely diagnosis and treatment. (2) pay attention to rational drug selection. To choose to use