池养鱼类最常见的寄生虫病是纤毛类原虫病。此病病原主要有车轮虫、斜管虫、小瓜虫、杯体虫等。这类寄生性原虫的流行地区广,遍及全国各地,流行盛期每年3至11月。鱼类感染此病时因破坏鳃瓣等表皮组织,腐蚀鳃尖,刺激鳃丝,使鱼类呼吸困难,痛苦异常, The most common parasitic disease in pond aquaculture is ciliated parasite disease. Pathogen of the disease are mainly car rotifers, pipe beetles, small melons, beetles and other cups. This parasitic protozoa epidemic areas, throughout all parts of the country, popular peak period from March to November every year. Fish infected with the disease due to the destruction of gill flap and other epidermal tissue, corroding gill sharp, stimulate gill filaments, so that fish breathing difficulties, painful abnormalities,