What is the vector of Fasciola hepatica?
Pseudosuccinea columella is one of the most widespread vectors of Fasciola hepatica, a globally distributed trematode that affects humans, livestock and wildlife. The exclusive occurrence in Cuba of susceptible and naturally-resistant populations to F.
What is the structure of Fasciola hepatica?
Structure of Fasciola Hepatica: (i) Shape, Size and Color: F. hepatica has a thin, dorsoventrally flattened, leaf-shaped, elongated and oval body. It measures about 25 to 30 mm in length and 4 to 12 mm in breadth.
What are the larval stages of Fasciola hepatica?
The correct sequence of various larval stages of Fasciola hepatica is: a) Miracidium → Cercaria → Metacercaria → Redia → Sporocysts.
What is the difference between Fasciola hepatica and Fasciola gigantica?
gigantica are longer but narrower, with a smaller shoulder, more anterior testes, larger ventral sucker and shorter cephalic cone compared to F. hepatica. In addition, the branching pattern of the caeca, ovary and testes is different in both species. The eggs are similar in shape, but are slightly larger in F.
Why is Fasciola called liver fluke?
Fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic trematode (fluke or flatworm, a type of helminth) of the class Trematoda, phylum Platyhelminthes. It infects the livers of various mammals, including humans, and is transmitted by sheep and cattle to humans the world over.
What is the sequence of development in flukes?
So, the correct option is, ‘egg, miracidium, sporocyst, cercaria’.
What are the major characteristics of Fasciola hepatica?
Adults of Fasciola hepatica are large and broadly-flattened, measuring up to 30 mm long and 15 mm wide. The anterior end is cone-shaped, unlike the rounded anterior end of Fasciolopsis buski. Adults reside in the bile ducts of the liver in the definitive host.
How can you distinguish Fasciola hepatica and Fasciolopsis buski?
F.
Adults of Fasciola hepatica are large and broadly-flattened, measuring up to 30 mm long and 15 mm wide. The anterior end is cone-shaped, unlike the rounded anterior end of Fasciolopsis buski. Adults reside in the bile ducts of the liver in the definitive host.
What type of parasite is Fasciola hepatica?
What is the infective stage of Fasciola?
The adult flukes reside in the large biliary ducts of the mammalian host. By this life cycle, it is known that the infective stage of Fasciola hepatica is metacercaria.
What are the 6 stages of the life cycle of the blood fluke?
The stages of the schistosome life cycle (1–10) include (1) elimination from the host as eggs in feces or urine (diagnostic stage), (2) hatching of miracidia, (3) infection of species-specific aqueous snail intermediate hosts, (4) proliferation of sporocysts within snails, (5) release of cercariae into water (infective …
What is the correct sequence of larval development?
So, the answer is ‘Miracidium, Sporocyst, Redia, Cercaria’.
How Fasciolopsis is different from Fasciola?
Fascioliasis is a disease caused by digenetic trematodes of the genus Fasciola; F. hepatica and F. gigantica are the two species causing human disease. Fasciolopsis buski, also a digenetic trematode, causes fasciolopsiasis.
How is Fasciolopsis buski diagnosed?
How is fasciolopsiasis diagnosed? The diagnosis is made by finding the flukes or their eggs in the feces or even in vomit.
Why Fasciola is called liver fluke?
How is fascioliasis diagnosed?
How is Fasciola infection diagnosed? The infection typically is diagnosed by examining stool (fecal) specimens under a microscope. The diagnosis is confirmed if Fasciola eggs are seen. More than one specimen may need to be examined to find the parasite.
Why is Fasciola also called liver fluke?
What is the life cycle of Fasciola hepatica?
Fasciola pass through five phases in their life cycle: egg, miracidium, cercaria, metacercaria, and adult fluke. The eggs are passed in the feces of mammalian hosts and, if they enter freshwater, the eggs hatch into miracidia.
Which is the first larval stage of Fasciola?
Miracidium Larva
Miracidium Larva:
It is the first larval stage in the life cycle of Fasciola hepatica.
What is the main pathology of Fascioliasis?
Parasites – Fascioliasis (Fasciola Infection)
The young worms move through the intestinal wall, the abdominal cavity, and the liver tissue, into the bile ducts, where they develop into mature adult flukes that produce eggs. The pathology typically is most pronounced in the bile ducts and liver.
What does Fasciolopsis buski cause?
The intestinal fluke Fasciolopsis buski, which causes faciolopsiasis, is the largest intestinal fluke of humans. Fasciolopsiasis can be prevented by cooking aquatic plants well before eating them. Fasciolopsis is found in south and southeastern Asia. Fasciolopsiasis is treatable.
What is false Fascioliasis?
False fascioliasis (pseudofascioliasis) refers to the presence of eggs in the stool not because of an actual infection but rather because of recent ingestion of liver contaminated with eggs, which are not infective for humans.
What is the primary host of liver fluke?
Cattle
Cattle, along with sheep, are the primary definitive hosts of F. hepatica and shed eggs in feces.
How is hepatica F diagnosed?
The standard way to be sure a person is infected with Fasciola is by seeing the parasite. This is usually done by finding Fasciola eggs in stool (fecal) specimens examined under a microscope. More than one specimen may need to be examined to find the parasite.
What is meant by fascioliasis?
Fascioliasis is a parasitic infection typically caused by Fasciola hepatica, which is also known as “the common liver fluke” or “the sheep liver fluke.” A related parasite, Fasciola gigantica, also can infect people.