五、丝状细菌病　　丝状细菌病的病原体主要为毛霉亮发菌，它生长于有机质含量丰富，偏酸性的环境，在鳗鲡受应激反应后，粘液分泌增加或脱落的养殖池中易发生，因而丝状细菌为水质不良的生物指标。丝状细菌于池底沉积的污物、池壁粘附污物及鳗鱼鳃丝上发现，当丝状细菌大量于 Fifth, filamentous bacterial disease The main pathogens of filamentous bacterial disease is Mucor brichistris, which grows in rich organic matter, acidic environment, after the stress reaction in the eel, mucus secretion increased or shed culture pond easy Occur, and thus filamentous bacteria as poor water quality biological indicators. Filamentous bacteria deposited on the bottom of the pool of dirt, wall adhesion dirt and eel gill filaments found that when the filamentous bacteria in large quantities