1病鱼症状我们发现异有银鲫患多态粘体虫病较为普遍、严重，病鱼头部、吻部、各鳍上生有大小不等的白色泡囊，数目为几颗到几百颗。当严重感染时，腹部及身体两侧鳞片下也会生有抱囊，但数目不多。解剖头部发现口腔上下颚、咽部、鳃耙上均生有抱囊。粘体虫除有本身的囊膜外，外 1 Symptoms of diseased fish We found polymorphic ichthyosis of allozygotic crucian carp more common and serious, head and snout of the diseased fish, white vesicles of varying sizes born on the fins, the number of several to hundreds . When a serious infection, the abdomen and the body will have a bulge under the scales on both sides, but a small number. Anatomy of the head found on the mouth of the jaw, pharynx, gill rake are born with a sac. Sticky insects except their own capsule, outside