الرئيسيةالبوابةس .و .جالتسجيلدخول

Digenes
Fasciola hepatica (Sheep liver fluke)
(Echinostomatiformes)


Definitive hosts: this species infectsa variety of mammals, especially ruminants
Site of infection: bile ducts and gall bladder
Typical size: 15-30 mm in length
Distribution: Worldwide
Intermediate host: several species oflymnaeid snails serve as suitable hosts, including Pseudosuccinea columella and Fossaria bulimoides in Kansas. One sporocyst andtwo redial generations occur.
Metacercariae: encystment on a variety ofaquatic vegetation




Eggs of Fasciola hepatica
(Digenea, Echinostomatiformes)





Fasciolopsis buski (Giant intestinal fluke)
(Echinostomatiformes)


Definitive hosts: this species infectsswine and humans
Site of infection: small intestine
Typical size: 20-75 mm in length
Distribution: Orient
Intermediate host: multiple species ofplanorbid snails serve as suitable hosts. One sporocyst andtwo redial generations occurwithin the snails
Metacercariae: encystment on a variety ofaquatic vegetation including water chestnuts, lotus, and bamboo.
Other: This parasite has sometimes beentouted as a cause of most cancers. There is no scientific data publishedin reputable, peer-reviewed scientific journals to support thishypothesis. This parasite is confined to the Orient and does not occurnaturally in North America.




Eggs of Schistosoma haematobium
(Digenea, Strigeiformes, Schistosomatidae)






Eggs of Schistosoma japonicum
(Digenea, Strigeiformes, Schistosomatidae)






Eggs of Schistosoma mansoni