《肝肺吸虫》Bilingual.ppt

①The 1st intermediate host — 川卷螺 Lung fluke?Life cycle 1. Host 2. Infection stage and method 3. Migration 4. Parasitism Position 5. Excreting stage and method ②The 2nd intermediate host — River Crab 溪蟹、Crawdad蝲蛄 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method Lung fluke?Life cycle ③ definitive host — human beings， carnivorous mammals 肉食性的哺乳动物 （保虫宿主） Lung fluke?Life cycle 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method ?Infection stage： encysted metacercaria ?Infection method： ingesting raw and mid-raw crabs. 溪蟹、蝲蛄 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method Lung fluke?Life cycle Under skin 童虫 纵隔 mediastinum Heart, brain Intestine wall Abdominal wall 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method Lung fluke?Life cycle 腹腔 肺 胸腔 膈 肌 diaphragm Worm capsule 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method Lung fluke?Life cycle Worm capsule: Integral: eggs precipitate in the capsule Connect with small blood vessels : cause thrombosis (血管栓塞) Connect with small lymph vessels: eggs precipitate in lung and lymph node. Connect with bronchus?(支气管）：eggs excrete with sputum/fecses 1. Host 2. Infection stage and method 3. Migration 4. parasitism Position 5. Excreting stage and method Lung fluke?Life cycle Disease-causing stage Pathogenesis Clinic symptoms Lung fluke?Pathogenesis Juvenile worms, adult worms Juvenile /adult worms caused allergic reactions and mechanical damages 脓肿期 囊肿期 纤维斑痕期 Lung-type Paragonimiasis (肺型肺吸虫病) Lung fluke?Pathogenesis Disease-causing stage Pathogenesis Clinic symptoms 脓肿期 囊肿期 纤维斑痕