larva

Under the fin stage, the larval stage of a tapeworm is understood, the larva of a tapeworm itself is called Finn.

After its manifestations Finns are named differently:

By recording ( ingestion) of tapeworm eggs that were excreted from the intestine of infected host, an intermediate host infected. The eggs develop into the Finns, who feed on the flesh of the intermediate host, and often cause his death by organ failure develop. If the carcass is eaten by the carnivorous definitive hosts, the Finns finally arrive in the intestine, where they develop into adult tapeworms - the reproductive cycle can start again.

Man is a definitive host, which is rarely seriously threatened by an infestation with adult worms for the fish, beef and pork tapeworm. Infection of man is to be excluded by the systematic meat inspection of beef and pork as possible.

In contrast, the Finns of dog tapeworm ( Echinococcus granulosus ) and fox tapeworm are ( Echinococcus multilocularis ) dangerous to humans, as he here acts as an intermediate host: for the disease, the Finns themselves, and not the adult forms are responsible. After an infection, a cystic ( dog tapeworm ) or alveolar echinococcosis ( tapeworm ) developed, especially latter untreated can lead to death.

Humans are accidental hosts for Finns here because its carcass normally not eaten and thus the propagation of the tapeworm is prohibited. The intermediate hosts in dog and fox tapeworms are usually mice, rats and rabbits.

• Parasitology