How many Rediae are produced from each sporocyst?

In this host, through larval stages of sporocyst, redia (sometimes two generations), it gives origin to many cercariae (about 4,000 from one miracidium, more than 500,000 from one snail).

What is a Rediae?

Definition 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.

Who is the final host of Fasciola hepatica?

Fasciola hepatica occurs in the liver of a definitive host and its lifecycle is indirect. Definitive hosts of the fluke are cattle, sheep, and buffaloes. Wild ruminants and other mammals, including humans, can act as definitive hosts as well.

What is redia and cercaria?

Cercaria (plural: cercariae) The larval form of the parasite 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 a 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 are the larval stages of Fasciola?

Due to the presence of several larval stages, the life history of Fasciola hepatica is very much complicated….Larval Stages:

• Miracidium Larva: It is the first larval stage in the life cycle of Fasciola hepatica.
• Sporocyst Larva:
• Redia Larva:
• Cercaria Larva:
• Metacercaria:

What is the 2nd intermediate host of Fasciola hepatica?

These are eaten by a second intermediate host, the ant Formica fusca.) The cercariae leave the intermediate host, swim to grassy vegetation, lose their tail, and become a cystlike metacercaria.

What is the first intermediate host of Fasciola hepatica?

lymnaeid snails
Parasitic Diseases Fasciola hepatica is a parasite of herbivorous mammals and humans. Distribution is worldwide and is dependent upon lymnaeid snails as an intermediate host.

What are the symptoms of Fasciola?

For example, symptoms can result from inflammation and blockage of bile ducts. During both phases of the infection, clinical features can include fever, malaise, abdominal pain, eosinophilia, hepatomegaly (an enlarged liver), and abnormal liver tests.

What are the symptoms of a liver fluke?

Untreated, infections may persist for up to 25–30 years, the lifespan of the parasite. Typical symptoms include indigestion, abdominal pain, diarrhea, or constipation. In severe cases, abdominal pain, nausea, and diarrhea can occur.