肺吸虫、曼氏绦虫、带绦虫、细粒棘球绦虫邹.ppt
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1、Paragonimus westermani Paragonimus westernani was first described from two Bengal tiger that had died in zoos in Europe in 1878.During the next 2 years, infections by this worm in humans were found in Furmosa. It was very quickly found in the lungs,brain,and viscera of humans in Japan, Korea, and th
2、e Philippines. The life cycle was worked out by Kobayashi and Yokagawa. The major focus of infection today remains in the Orient, including India and the Philippines. It also appears to be endemic throughout the East Indies, New Guinea, the Solomon Islands, Samoa, western Africa, Peru, Colombia, and
3、 Venezuela. The taxonomy of the genus is difficult, and some of these reports may be of other, closely related species. Paragonimiasis is an excellent example of zoonosis.,并殖吸虫,卫氏并殖吸虫(肺吸虫),Paragonimus westermani,卵巢,子宫,睾丸,卵 黄 腺,一、形态,成虫,子宫,中等大小,不规则椭圆形,金黄色,1个卵细胞、 10多个卵黄细胞,卵壳厚薄不一,卵盖大、常倾斜、 也可缺如,虫卵,毛蚴,成虫,
4、(肺),人、犬、 猫、虎等,体内移行,穿肠壁,二、生活史,Life cycle,母雷蚴,子雷蚴,尾蚴,溪蟹,滞育童虫,(野猪、野鼠),卵,窜扰,肝、脑、皮下,1、感染期: 2、感染方式: 3、寄生部位: 4、终宿主: 5、保虫宿主:,囊蚴,生吃含囊蚴的溪蟹、转续 宿主的肉(猪肉),犬、猫、虎,人,生活史特点:,肺、异位寄生,三、致病(pathogenesis),急性期,慢性期,脓肿期,囊肿期,纤维疤痕期,The early, invasion stages of paragonimiasis cause few or no symptomatic pathological conditions
5、. Once in a lung or an ectopic site, the worm stimulates connective tissue proliferation that eventually will enshroud it in a brownish or bluish capsule. Such capsules often ulcerate and heal slowly. Eggs in surrounding tissues will themselves become centers of pseudotubercles. Worms in the spinal
6、cord are known to cause paralysis, which sometimes is total. Fatal cases of Paragonimus in the heart have been recorded. Cerebral cases have the same results as those of cerebral cysticercosis. Pulmonary cases usually cause chest symptoms ,with breathing difficulties, chronic cough, and sputum conta
7、ining blood or brownish streaks. Fatal cases are common.,三、致病(pathogenesis),临床分型,胸肺型,腹型,皮下包块型,脑脊髓型,亚临床型,其他型,录像,四、诊断(diagnosis),病原学诊断,免疫学诊断,痰检虫卵,活组织检查,粪检虫卵,皮内试验,直接涂片法,五、流行与防治 (Endemity and Prevention),流行,毛蚴,成虫,(肺),人、犬、 猫、虎等,母雷蚴,子雷蚴,尾蚴,溪蟹,滞育童虫,(野猪、野鼠),卵,1,2,3,传染源,卵巢,子宫,睾丸,卵 黄 腺,一、形态,成虫,斯氏狸殖吸虫,Pagumogo
8、nimus skrjabini,卫氏并殖吸虫,第一中间宿主,川卷螺,斯氏狸殖吸虫,拟钉螺,终宿主,人,犬,虎,果子狸,幼虫移行症,第十一章 绦 虫,(Cestode),第一节 概 论,P131,2、虫体分节,3、雌雄同体;,4、无消化系统,靠体壁吸收营养。,1、外形:,头节:,颈部:,链体:,形态 (morphology),有固着器官(吸盘、吸槽),生长节,幼节 成节 孕节,细长如带、乳白色、背腹扁平、对称;,共同特征,成虫,前进,肥胖带绦虫,圆叶目,假叶目,猪带绦虫,牛带绦虫,曼氏迭宫绦虫,头节:,成节:,孕节:,Cyclophyllidea,Pseudophyllidea,前进,圆叶目头节
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