Cercaria Encysted

Cercaria insitu is one of the stages of the life cycle of the cestads of the parasitic tapeworm, the bovine tapeworm.

Cercaria is the larval stage of cestode development, in which the intestine is already formed and filled with eggs, but it has not yet been covered with a hard shell - a mask. The embryo develops eyes, intestines, gonads, anus and protonephridia. In this form, the cercariae parasitize in the external environment, and within a few weeks they develop into the next larva - a metacercaria. Cercariae are not dangerous to humans, but they can cause

Encapsulation in the cyst is a mechanism of protection and survival of parasites at all stages of their life cycle. It is considered one of the earliest evolutionary methods, since cysts were absent in the ancestors of modern parasitic protists. The larvae are encapsulated in a ceridium - a shell made of a dense fibrous wall (syn.: chitinous shell), characteristic of many nematodes, audotozoids, leishmania, malarial plasmodium, helminths and coccidia. This results in the formation of a larval stage, which can be considered a metacercaria.

Encysted cercariae are parasites belonging to the family of nematodes, that is, roundworms. Their characteristic feature is the ability to encyst (go into hibernation) when they cannot continue their further development in the host’s body. Thus, they are easily transported to other places and can become new hosts.

Cercarial encystment usually occurs under unfavorable conditions, such as insufficient food or cold. In this case, the parasite may not infect the victim completely, but only partially, which can