What is the meaning of redia?
What is the meaning of redia?
: a larval form of a digenetic trematode (such as a liver fluke) that is produced within a sporocyst, has a mouth, pharynx, and gut, and contains cells which give rise to other rediae or to cercariae — see also redial entry 3.
What is meant by sporocyst?
1 : a case or cyst secreted by some sporozoans preliminary to sporogony also : a sporozoan encysted in such a case. 2 : a saccular body that is the first asexual reproductive form of a digenetic trematode, develops from a miracidium, and buds off cells from its inner surface which develop into rediae.
What is meant by miracidium?
Medical Definition of miracidium : the free-swimming ciliated first larva of a digenetic trematode that seeks out and penetrates a suitable snail intermediate host in which it develops into a sporocyst. Other Words from miracidium. miracidial \ -ē-əl \ adjective.
What does Cercaria mean?
Medical Definition of cercaria : a usually tadpole-shaped larval trematode worm that develops in a molluscan host from a redia. Other Words from cercaria. cercarial \ -ē-əl \ adjective.
Where is Cercaria found?
A cercaria (plural cercariae) is the larval form of the parasite Trematode. It develops within the germinal cells of the sporocyst or redia. A cercaria has a tapering head with large penetration glands.
What is sporocyst larva?
A larval form of digenetic trematode (fluke) that develops in the body of its molluscan intermediate host, usually a snail; the sporocyst forms a simple saclike structure with germinal cells that bud off internally and develop into other larval types that continue this process of larval multiplication (considered to be …
What is the Cercaria stage?
Cercaria: After about six to seven weeks within the snail (first) intermediate host, the sporocyst finally gives rise to the cercaria. It is in this stage that the parasite infects the definitive human host via ingestion of the snail or other second intermediate host.
What is the life cycle of trematode?
There are three distinct larval stages involved in all digenetic trematode life cycles: the miracidium, sporocyst, and cercaria. Some taxa also produce rediae and/or encysted metacercariae. All of these life stages except for the miracidium can be found in first intermediate hosts.
What is the cercaria stage?
What is the life cycle of Schistosoma?
The schistosome life cycle occurs in 2 hosts: snails and mammals. Either asexual or sexual reproduction occurs, depending on the type of host (Figure 1). Asexual reproduction occurs in freshwater snails. In the snail, this begins with the development of miracidia into a sporocyst.
What is Amphiblastula larva?
: a free-swimming larva of certain sponges that is essentially a blastula with small flagellated cells in one hemisphere and large nonflagellated cells in the other.
What is Cercaria larva?
A cercaria (plural cercariae) is the larval form of the parasite Trematode. It develops within the germinal cells of the sporocyst or redia. A cercaria has a tapering head with large penetration glands. It may or may not have a long swimming “tail”, depending on the species.
What is the meaning of redia? : a larval form of a digenetic trematode (such as a liver fluke) that is produced within a sporocyst, has a mouth, pharynx, and gut, and contains cells which give rise to other rediae or to cercariae — see also redial entry 3. What is meant by sporocyst? 1…