然而，这些亚致死的症状并没有观察到鱼种虹鳟鱼暴露在平均浓度百万分之22.3的F -后8天。
However, these sublethal symptoms were not observed in fingerlings of rainbow trout exposed to a mean concentration of 22.3 ppm F- after 8 days.
长时间接触亚致死剂量的消毒剂可以诱导对该种消毒剂的抗性增强，提示在日常消毒工作中应注意足量使用消毒剂，不能随意降低浓度长期使用。
Suggesting that in our daily disinfection work should pay attention to the use of disinfectants in sufficient dose and can not arbitrarily reduce the concentration of long-term use.
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