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1鱼病的诊断鱼病的种类繁多,发生的原因也错综复杂,鱼病发生后是否能尽快得到控制,对鱼病迅速作出正确的诊断,判明主要致病因子是首要步骤。只有正确诊断鱼类患何种疾病,是何种原因引起,才能对症下药,取得控制疾病的效果。1．1现场调查、询问在诊断鱼病之前,首先向养殖者调查询问。在草鱼、鲢、鳙、鲤、鲫混养的池塘内,仅是草鱼得病。应首先怀疑是草鱼四病(出血病、赤皮病、烂鳃病、肠炎病)；如果混养池塘的各种鱼类按鲢、鳙、草鱼、鲤、鲫的顺
1 The diagnosis of fish diseases A wide range of fish diseases, the reasons are complicated, whether the fish disease can be controlled as soon as possible after the fish disease to make the correct diagnosis promptly identified the main risk factors is the first step. Only the correct diagnosis of what kind of fish disease, what is the reason, in order to prescribe the right medicine, to obtain the effect of controlling the disease. 1.1 On-site investigation, inquiry Before the diagnosis of fish disease, first of all to the farmer survey inquiry. Grass carp, silver carp, bream, carp, crucian carp polyculture ponds, grass carp is only sick. Should be the first suspected four diseases of grass carp (hemorrhagic disease, red-skin disease, rotten gill disease, enteritis disease); if polyculture ponds of various species of silver carp, bream, grass carp, carp, crucian carp