Echinococcosis( 棘球蚴病）

组员：冯顺意 黄敬贤 龙佳

Echinococcosis( 棘球蚴病 ) Echinococcus granulosus （细粒棘球绦虫）Hydatid( 棘球蚴 )

It is a zoonotic disease （动物传染病） affecting mainly various species of livestock and humans.

It causes great economic losses in animal husbandry

Morphology

Echinococcus granulosus( 细粒棘球绦虫 )

Hydatid ( 棘球蚴 )

Echinococcus granulosus( 细粒棘球绦虫 )

Definitive host: dog 、 wolf 、 fox

Site:small intestine

Hydatid ( 棘球蚴 )• Intermediate host:cattle 、 goat and sh

eep 、 pig 、 horse 、 camel ， wildlife and humans

• Site: liver 、 lung

Life cycle

Epidemiology

• Cosmopolitic distribution （世界性分布）• High infection rate in sheep （绵羊感染率

最高）• E. granulosus （细粒棘球绦虫） and E. m

ultilocularis （多房棘球绦虫） can infect human

• Strong resistance of egg

Sympotoms and Lesions

Harm the human body and animal body mainly by mechanical damage

　　　　　　　　　　 Hydatid 　

　　

　 Oppression tissues and organs around it

Tissue 、 cell atrophy （萎缩） , necrosis （坏死） , Hydatid

fluid leakage （棘球蚴液渗出）　

Toxicity or allergic reaction 　

Continued growth

腹部包虫病患者

Section of sheep liver showing fertile Hydatid cysts

DIAGNOSIS• Clinical symptoms （临床症状）： a slow-growing tumor

accompanied by eosinophilia( 嗜酸性粒细胞增多 ).• Intradermal test( 皮试 ) with Hydatid fluid. • Pulmonary cysts （肺囊肿） and calcified cysts （钙化

的包囊） can be visualized using x-rays(X 光透视 ).

• Immunological methods: IHA, ELISA, ABC-ELISA ( 亲和素生物素酶免疫吸附试验 ), E-CIEP ( 酶标记对流免疫电泳 ), etc

TREATMENT• Dogs: Can use praziquantel （吡喹酮） . After treatment it is adv

isable to confine dogs for 48 hours to facilitate the collection and disposal of infected faeces.

• Sheep, yak and cattle: Can use albendazole ( 丙硫咪唑 ): 90 mg∕kg （连服 2 次） ,

and praziquantel ( 吡喹酮 ):25~30 mg∕kg.• Humans: Surgical excision （外科切除） of hydatid cysts although

there is a risk of re-development of released daughter cysts （子囊） . Can use mebendazole （甲苯咪唑） , albendazole （丙硫咪唑） and praziquantel （吡喹酮） .

Prevention

• Ban to feed dog with infected organs

• Deworming of dogs

• Maintain the barn, feed, water sanitation, prevention of canine fecal contamination

• For us ,pay attention to personal hygiene （个人卫生）

• Avoiding contact with infected dogs

谢 谢！