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作为文蛤吸虫病害研究的基础资料,报道了寄生在文蛤体内的1种复殖吸虫幼虫的形态结构及宿主由此所产生的组织病理学变化。研究表明:该吸虫分别为胞蚴和尾蚴。胞蚴圆筒形,内含不同发育阶段的尾蚴。成熟尾蚴体成扁平舌状,具有口吸盘、腹吸盘,1对眼点和1条细长无刺的尾巴。该吸虫主要侵占生殖腺,少部分幼虫进入附近的消化盲囊、鳃、肾等部位。轻微感染者,生殖滤泡萎缩,生殖细胞发育滞后;严重感染的宿主,生殖腺完全被侵占并耗尽。消化盲囊、鳃、肾等器官组织也因幼虫感染呈现不同程度的病理学变化;严重者上皮细胞水肿或脱落,肌肉组织结构紊乱或溶解等。本工作同时显示,吸虫寄生可诱发宿主血淋巴细胞大量增生,并产生凝集、组织浸润及形成包囊等免疫反应。
As a basis for the research on clams disease, the morphological structure of one species of Paragonimus larva parasitized in the clam and the histopathological changes produced by the host were reported. Studies have shown that: the flukes were cercariae and cercariae respectively. Cyclospora cylindrical, containing different stages of development of cercariae. Mature cercaria body into a flat tongue, with sucker mouth, abdominal suction cup, a pair of eyes and a slender stingless tail. The flukes mainly invade the gonads, a small part of the larvae into the nearby digestive blind capsule, gills, kidneys and other parts. Slightly infected, reproductive follicular atrophy, germ cell development lag; severe infection of the host, the gonads completely occupied and depleted. Digestive blind capsule, gill, kidney and other organ tissues also showed varying degrees of pathological changes due to larval infection; severe epithelial cells edema or loss, muscle tissue disorder or dissolution. This work also shows that fluke parasites can induce large proliferation of host blood lymphocytes and produce agglutination, tissue infiltration and the formation of cysts and other immune responses.