Cysticercus
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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.
species
| 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.