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1996～1998年连续三年,我们进行了饲料微生物污染对鱼类的致病作用的调查研究。结果表明:饲料污染对鱼有直接的致病作用,可导致投饵型鱼类如鲤、鲫、罗非鱼、淡水白鲳等鱼发病,严重的可引起死亡。发病种类为典型的肠炎病,并可诱发出血性败血病.病程表现为急性暴发型和慢性型两种。鱼病发生的起病缓急与饲料污染的严重程度具有一定的相关性,饲料污染越严重,微生物细菌总数含量越高,鱼的发病症状越重,死亡量越大。当饲料中细菌总数超过1.0×10~6个/克细菌时,可以判定为诱发鱼病的主要指标。本文还对不同类型饲料污染的危害性进行了研究探讨。
For three consecutive years from 1996 to 1998, we conducted a survey on the pathogenic effects of feed microbial contamination on fish. The results showed that the feed pollution had a direct pathogenic effect on fish, which could lead to the onset of fish feeding the type of fish such as carp, crucian carp, tilapia and freshwater pomfret, which could cause serious death. Incidence of a typical type of enteritis disease, and can induce hemorrhagic septicemia. The course of the performance of acute and chronic type two. The incidence of fish diseases and feeding the first priority has a certain degree of relevance to the severity of pollution, feed pollution is more serious, the higher the total number of microbial flora, the more severe symptoms of fish, the greater the amount of death. When the total number of bacteria in the feed exceeds 1.0 × 10 ~ 6 bacteria per gram, it can be judged as the main index for inducing fish diseases. This article also studied the dangers of different types of feed contamination.