姜片蟲肝片形吸蟲分解

1、,,Fasciola hepatica 肝片形吸蟲,Fasciolopsis buski 布氏姜片吸蟲,布氏姜片吸蟲Fasciolopsis buski,俗稱姜片蟲，也稱腸吸蟲 寄生于人體小腸內(nèi) 致姜片蟲病,Contents:,形態(tài) Morphology生活史 Life cycle致病 Pathogenicity診斷 Diagnosis流行 Epidemiology防治

2、 Prevention and treatment,Living adult,Dead adult,Morphology,adult,口吸盤,,腹吸盤,,子宮,,卵巢,,睪丸,,卵黃腺,,Morphology,,egg:,大小:形狀: 橢圓形 卵殼: 薄 (卵蓋不明顯) 顏色: 淡黃色 內(nèi)容物: 1個卵細(xì)胞和數(shù)十個卵黃細(xì)胞,卵 蓋,,,Morphology,,The cercariae are released from the

3、 snail and encyst as metacercariae on aquatic plants(水生植物).,The adult resides in the host’s small intestine.,The eggs hatch, producing a free-swimming miracidium.,Eggs are passed with the host’s feces into water.,The mir

4、acidium infects the intermediate host, a snail.,The metacercaria is ingested by the definitive host and “excysts” in the small intestine.,Life cycle,,Transmit vector：,Brief summary of life cycle,人或豬,水生植物,小腸,扁卷螺,豬,Route o

5、f infection：,囊蚴,生食含囊蚴的水生植物,Definitive host：,Reservior host:,Site of inhabitation:,Intermediate host:,Infective stage：,,Pathogenicity,臨床表現(xiàn):,,輕度感染: 無癥狀  嚴(yán)重感染: 腹痛、腹瀉、腸梗阻，對于兒童可出現(xiàn)侏儒癥,,病原學(xué)診斷: 糞便中檢獲蟲卵或成蟲.,,Laboratory

6、 Diagnosis,糞便直接涂片法 水洗沉淀法,Epidemiology,分布流行因素：傳染源中間宿主不良飲食習(xí)慣,,,,Prevention and treatment,查治傳染源：praziquantel（吡喹酮） 切斷傳播途徑：加強(qiáng)糞便管理；滅螺 保護(hù)易感人群：加強(qiáng)衛(wèi)生,,,,,,寄生于肝膽管內(nèi)，致片形吸蟲病。,肝片形吸蟲 Fasciola hepatica,頭錐,morphology:,morp

7、hology,與姜片蟲卵相似,Life cycle,Definitive host:Intermediate host: Reservoir host: Inhabited site:Transmit vector：,Brief summary of life cycle,牛、羊 / 人,椎實(shí)螺,牛、羊等.,肝膽管,水生植物,Pathogenicity,急性期 : 由童蟲移行所致 高熱、腹痛、腹瀉及肝腫大和血中嗜酸性