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Historical white model of Cysticercus, Rostock Zoological Collection

As Cysticercus ( cysticercus , "bladder worm") is called a Finn stage of genuine tapeworms , in particular in the Cyclophyllidea occurs. It is a thin-walled, liquid-filled bladder, into which the head ( scolex ) and a neck zone of the future tapeworm protrude from the wall into the interior. The cysts can be as large as a walnut and contain only a single tapeworm attachment.

Cysticercus occurs in intermediate hosts and is deposited in various tissues ( cysticercosis ). They are taken in with the food and develop into the actual tapeworm in the ultimate host.


fin Intermediate host adult tapeworm
Cysticercus bovis or inermis (cattle fin) Beef Beef tapeworm
Cysticercus cellulosus (pig fin) pig Pork tapeworm
Cysticercus cervi deer Taenia cervi
Cysticercus fasciolaris Rodents Taenia taeniaformis
Cysticercus longicollis Rodents, rabbits Taenia crassiceps
Cysticercus ovis sheep Taenia ovis
Cysticercus pisiformis Rabbits, rodents, squirrels, chinchillas Taenia pisiformis
Cysticercus tarandi Reindeer, deer Taenia krabbei
Cysticercus tenuicollis Ruminants, pigs, rodents Taenia hydatigena

Cysticercus racemosus is a special form of the cattle or pig fin that develops when implanted in the cerebral ventricles . They can grow up to 20 cm and have no connective tissue covering.