Metacestode
Metacestode
Metacestode (pronunciation: meh-tuh-seh-stohd) is a term used in parasitology to refer to the larval stage of certain parasites, specifically cestodes or tapeworms.
Etymology
The term "metacestode" is derived from the Greek words "meta", meaning "after", and "cestode", which refers to the class of parasitic flatworms known as tapeworms.
Definition
A metacestode is the intermediate, or larval, stage in the life cycle of a cestode. This stage follows the oncosphere stage and precedes the adult stage. The metacestode develops in the intermediate host and can take on various forms, including cysticercus, hydatid cyst, and plerocercoid, depending on the species of cestode.
Related Terms
- Cestode: A class of parasitic flatworms, commonly known as tapeworms.
- Oncosphere: The first larval stage of a cestode, which hatches from the egg.
- Cysticercus: A type of metacestode that develops into a fluid-filled cyst.
- Hydatid cyst: A type of metacestode that forms in the tissues of the intermediate host, often causing disease.
- Plerocercoid: A type of metacestode that is elongated and worm-like in form.
External links
- Medical encyclopedia article on Metacestode
- Wikipedia's article - Metacestode
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