Human infection is not common, but occurring worldwidely. Fasciola hepatica is a trematode parasite in the same family as schistosomes and shares crossreactive antigens with schistosomes. Infected by eating raw watercress or water plants contaminated by immature larvae. The definite hosts of fasciola hepatica are sheeps, cows, and humans. Oct 20, 2014 the two species of trematodes that cause fascioliasis fasciola hepatica and fasciola gigantica are leafshaped worms, large enough to be visible to the naked eye adult f. Clinical presentation and management of fasciola hepatica. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh. Fasciolahepatica is a common fluke found in the liver and bile ducts of cattle, sheep, goat, pig, rabbit, dog etc.
Sep 24, 2012 fasciola hepatica en colombia alex javier carmona parasitologia 2012 microbiologia up 21. The intermediate host is a hermaphroditic lymnaeid snail major sources of human. Habitata parasite of herbivorous anim als sheep,goat and cattle, living in. Bio 462 study guide 2014 bates instructor bates at.
It has been classified as a neglected tropical disease. The primary host is sheep in which the adult liver flukes live. The disease caused by the fluke is called fasciolosis or fascioliasis, which is a type of. Fasciola hepatica infection was detected in 30 patients 24 females, mean age.
The life history of the liverfluke fasciola hepatica. Pdf clinical characteristics of chronic infection by. It is a parasitic trematode fluke or flatworm in the phylum platyhelminthes it infects the livers of various mammals, including humans. Fasciola hepatica, in addition to sheep, also infects other vertebrates like goat, deer, horse, dog, ass, ox and occasionally man. Two species of parasitic flatworms fasciola gigantica and fasciola hepatica affect the liver and are responsible for causing fascioliasis. Description of eggs and larval stages of fasciola, light. They have a hard shell and are also involved in the trophic transmission. Fasciolosis is a parasitic worm infection caused by the common liver fluke fasciola hepatica as well as by fasciola gigantica. They are involved in an encysted stage either on vegetation or in a host tissue on the second intermediate host.
In this article we will discuss about fasciola hepatica. Fasciola, lymnaeids and human fascioliasis, with a global overview on disease transmission, epidemiology, evolutionary genetics, molecular epidemiology and control. These animals become infected by eating metacercariae encysted on. Metacercaria larva of fasciola hepatica pixelmasterdesign. The lifecycle of fasciola hepatica is completed in two hosts. Its life cycle is completed in two hosts, a vertebrate, the sheep and an invertebrate host, which is the snail of the genera planorbis, limnaea and bulinus. Leuckartthomos reported the life cycle of liver fluke in snail. It is endemic in more than 40 countries, including those in europe, north africa, asia, south america, and the western pacific. Fasciola hepatica is a parasitic fluke that lives in the liver. The primary or definite host is sheep or cattle, while the secondary or intermediate host is a small of the genus limnaea. Pdf first report of larval stages of fasciola hepatica in a wild. Fasciola hepatica is a zoonotic liver fluke that can cause disease in humans. Fasciola hepatica is a large liver fluke that lives in the bile ducts of its mammalian hosts, which commonly include sheep and cattle. The motile cercaria finds and settles in a host where it will become either an adult, or a mesocercaria, or a metacercaria, according to species.
Fasciola hepatica, metacercaria slide wards science. It is known as the common liver fluke and causes a disease called fascioliasis. Fasciola hepatica an overview sciencedirect topics. Fasciola hepatica accessed 2 november 2017 occurs in southeast asia and other locations where population consumes watercress or other freshwater plants containing metacercariae gastroenterol clin north am. Its life history includes a number of larval stages which propagate by asexual multiplication polyembryony. When encysted metacercaria are swallowed by a human, they excyst in the lumen of the. Fasciola hepatica bahiya basheer 2nd year mbbs student 2. Fasciola fasciola hepatica e um verme achatado, trematodeo da familia dos fasciolideos, filo platyhelminthes, parasita dos canais biliares do boi, ovelha, cabra, porco e, raramente, do homem. Fasciola hepatica simple english wikipedia, the free. The disease progresses through four distinct phases. Fasciola hepatica sheep liver fluke phylum platyhelminthe class trematoda fasciola gigantica very rarely infects humans. The several concentric layers of the cyst wall of fasciola hepatica are formed from precursors synthesised in the cystogenic cells of the cercaria during its development in the redia. Whereas the intermediate or secondary host is a snail in which all the larval stages are developed.
Fasciola hepatica the liver fluke fasciola hepatica is a common fluke found in the liver and bile ducts of cattle, sheep, goat, pig, rabbit, dog etc. Digenean trematodes nonschistosomes histology biology. Eggs of fasciola hepatica have been found in mummies, showing that human infection was occurring at least as early as pharaonic times farag. The disease caused by the fluke is called fascioliasis. Metacercaria larva slide home metacercaria larva slide 20200426 20200426 tagged presentasi platyhelminthesnemathelminthes. The life cycle, transmission, morphology, clinical presentation, and treatment of the f. Daur hidup chlonorchis sinensis sama seperti fasciola hepatica, tumisir calon mc telur mirasidium sporosis redia cercaria metacercaria hanya saja metaserkaria pada cacing ini masuk ke dalam daging ikan air. Fascioliasis due to fasciola hepatica and fasciola gigantica infection. Quizlet flashcards, activities and games help you improve your grades. In sheep, the migratory phase of the parasite produces severe parenchymal disease of the liver for which the parasite is called sheep liver fluke and the disease is known as liver rot. The following are the stages in the life cycle of fasciola. The outer portion of the wall consists of two layers.
Cercaria larva of fasciola hepatica cercaria larva of fasciola hepatica. The disease is a plantborne trematode zoonosis, and is classified as a neglected tropical disease ntd. A cinematographic analysis shows that the separate components are released in succession during encystment. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Hepatic fasciolosis is mainly of economic importance in sheep or cattle, but other species may provide a. Description of eggs and larval stages of fasciola, light and. Metacercaria larva of fasciola hepatica 20200426 20200426 tagged trematode life cycle stages wikipedia. Fasciola hepatica en colombia alex javier carmona parasitologia 2012 microbiologia up 22. Light microscopy lm and scanning electron microscopy sem were used to study the egg and miracidium of fasciola gigantica and redia, cercaria and metacercaria from field infected lymnaea cailliaudi natalensis snails, to analyze the differences between eggs and intramolluscan stages of f. It completes its life history in sheep and fresh water snail.
When encysted metacercaria are swallowed by a human, they excyst in the lumen of the intestine and migrate toward the liver, where it feeds upon hepatocytes, causing necrosis and haemorrhages. Reproductive system, life cycle in sheep and snail. The egg the eggs of fasciola hepatica are operculated and average 140. Immature larvae migrate from intestine abdominal cavity liver bile duct mature adult. It causes damage to the liver tissues producing liver rot in all sheep breeding areas of the world. I will always check wards for parasite specimens before checking elsewhere. In fascioliasis caused by the liver fluke fasciola hepatica, a small parasitic flatworm that lives in the bile ducts and causes a condition known as liver rot read more. Fasciola hepatica is the most common and important liver fluke and has a cosmopolitan distribution in cooler climates. Pdf recent studies show that human fascioliasis is an infectious disease with significance in peru and in other latin american countries. Europe, africa, asia, australia, south and central america infection rate. It affects humans, but its main host is ruminants such as cattle and sheep.
The below mentioned article provides an overview on fasciola hepatica 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 is important to get an idea about the fasciola hepatica life cycle to determine the best treatment option. Fasciola hepatica commonly called sheep liver fluke. The cercarias are free larvae actively swimming in the water, where mature after leaving. T able 2 logistic regression analysis for risk factors for fasciola hepatica infection v ariable cases n 61 controls n 61 odds ratio 95% ci p drinking alfalfa juice 42 68. My fasciola hepatica metacercaria specimen was the highest quality possible. Fasciola hepatica the liver fluke zoology for ias, ifos. It infects the livers of various mammals, including humans. Man may become infested with this fluke by eating uncooked vegetables. Fasciola hepatica liver fluke or sheep liver fluke eggs in stool of infected mammals sheepcattle snail aquatic vegetation human.
It is a parasitic trematode fluke or flatworm in the phylum platyhelminthes. Fasciola hepatica an overview sciencedirect topics fasciola hepatica wikipedia figure 6 file. Fernando julio biole cooperativa electrica las perdices. Fasciola hepatica study guide by mendi15 includes 43 questions covering vocabulary, terms and more. Thomas capillaria hepatica is a parasitic nematode which causes hepatic capillariasis in rodents and. Among domestic animals, the sheep liver fluke fasciola hepatica may cause debilitating and fatal epidemics liver rot in sheep. The life cycle of fasciola hepatica is complex and it is completed in two different hosts as it is a digenetic parasite. A stable 2629 kda, coproantigen has been isolated and the monoclonal antibodies against this antigen are useful for the detection of the antigen in stools. Galba truncatula, an amphibious freshwater lymnaeid snail that serves as the main intermediate host of fasciola hepatica in europe the lifecycle of fasciola hepatica fasciola hepatica occurs in the liver of a definitive host and its lifecycle is indirect. Oct 11, 2019 fasciola, lymnaeids and human fascioliasis, with a global overview on disease transmission, epidemiology, evolutionary genetics, molecular epidemiology and control. Fasciola hepatica can affect 46 species of wild and domestic animals as well as humans. Fasciola hepatica the common names are the sheep liver fluke and the common liver fluke.