河蟹纤毛虫病是由累枝虫、钟形虫、斜管虫等纤毛虫类寄生于河蟹体表、附肢、鳃部等部位引起的,尤其以二龄以上性成熟的河蟹感染率最高。蟹种放养密度大,蟹池条件恶劣,长期不换水,水中有机质含量过高,水化指标氨氮含量 Crab ciliate disease is caused by the parasitism of ciliates such as Toxoplasma gondii, Bell Labyrinths and Coccidiosis on the body surface, appendages, gills and other parts of the crab, especially the crabs infected by sexual maturity over the second instar. Crab species stocking density, crab pool poor conditions, long-term do not change the water, organic matter content in water is too high, hydration indicators ammonia nitrogen content