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试验结果表明:从无节幼体到糠虾幼体阶段水体中细菌的正常数量范围为1.0×105~6.9×1017cfu/ml。超过这个数量水平将使幼体发病。用药物控制和降低育苗期间水体中细菌数量是预防虾病发生的有效措施。
The results showed that the normal range of bacteria numbers from nauplii to molluscan shrimp larvae was 1.0 × 105 ~ 6.9 × 1017cfu / ml. Exceeding this quantity level will make juvenile onset. Using drugs to control and reduce the amount of bacteria in the water during seedling is an effective measure to prevent the occurrence of shrimp diseases.