姜片虫肝片形吸虫分解.ppt

,Fasciola hepatica 肝片形吸虫,Fasciolopsis buski 布氏姜片吸虫,布氏姜片吸虫 Fasciolopsis buski,俗称姜片虫，也称肠吸虫 寄生于人体小肠内 致姜片虫病,Contents:,形态 Morphology 生活史 Life cycle 致病 Pathogenicity 诊断 Diagnosis 流行 Epidemiology 防治 Prevention and treatment,Living adult,Dead adult,Morphology,adult,口吸盘,腹吸盘,子宫,卵巢,睾丸,卵黄腺,Morphology,egg:,大小: 形状: 椭圆形 卵壳: 薄 (卵盖不明显) 颜色: 淡黄色 内容物: 1个卵细胞和数十个卵黄细胞,卵 盖,Morphology,The cercariae are released from the snail and encyst as metacercariae on aquatic plants(水生植物).,The adult resides in the hosts small intestine.,The eggs hatch, producing a free-swimming miracidium.,Eggs are passed with the hosts feces into water.,The miracidium 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,人或猪,水生植物,小肠,扁卷螺,猪,Route of 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,临床表现:,轻度感染: 无症状 严重感染: 腹痛、腹泻、肠梗阻，对于儿童可出现侏儒症,病原学诊断: 粪便中检获虫卵或成虫.,Laboratory Diagnosis,粪便直接涂片法 水洗沉淀法,Epidemiology,分布 流行因素： 传染源 中间宿主 不良饮食习惯,Prevention and treatment,查治传染源： praziquantel（吡喹酮） 切断传播途径：加强粪便管理；灭螺 保护易感人群：加强卫生,寄生于肝胆管内，致片形吸虫病。,肝片形吸虫 Fasciola hepatica,头锥,morphology:,morphology,与姜片虫卵相似,Life cycle,Definitive host: Intermediate host: Reservoir host: Inhabited site: Transmit vector：,Brief summary of life cycle,牛、羊 / 人,椎实螺,牛、羊等.,肝胆管,水生植物,Pathogenicity,急性期 : 由童虫移行所致 高热、腹痛、腹泻及肝肿大和血中嗜酸性粒细胞