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. Fasciola hepatica an overview sciencedirect topics fasciola hepatica wikipedia figure 6 file. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh. Digenean trematodes nonschistosomes histology biology. Fasciola hepatica is the most common and important liver fluke and has a cosmopolitan distribution in cooler climates. The disease progresses through four distinct phases. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Pdf clinical characteristics of chronic infection by. Fasciola hepatica is a parasitic fluke that lives in the liver. 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. Clinical presentation and management of fasciola hepatica. Metacercaria larva slide home metacercaria larva slide 20200426 20200426 tagged presentasi platyhelminthesnemathelminthes. 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.
Fernando julio biole cooperativa electrica las perdices. 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. It is a parasitic trematode fluke or flatworm in the phylum platyhelminthes it infects the livers of various mammals, including humans. 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. Eggs of fasciola hepatica have been found in mummies, showing that human infection was occurring at least as early as pharaonic times farag. Economically important infections are seen in cattle, sheep, alpacas, and llamas in three forms. In this article we will discuss about fasciola hepatica. Man may become infested with this fluke by eating uncooked vegetables.
The intermediate host is a hermaphroditic lymnaeid snail major sources of human. 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. 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. 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. A cinematographic analysis shows that the separate components are released in succession during encystment. It completes its life history in sheep and fresh water snail. Pdf recent studies show that human fascioliasis is an infectious disease with significance in peru and in other latin american countries. Leuckartthomos reported the life cycle of liver fluke in snail. Fasciola, lymnaeids and human fascioliasis, with a global overview on disease transmission, epidemiology, evolutionary genetics, molecular epidemiology and control.
Fasciola hepatica bahiya basheer 2nd year mbbs student 2. The below mentioned article provides an overview on fasciola hepatica liver fluke. The disease caused by the fluke is called fasciolosis or fascioliasis, which is a type of. Its life history includes a number of larval stages which propagate by asexual multiplication polyembryony. Fasciola hepatica an overview sciencedirect topics. It is important to get an idea about the fasciola hepatica life cycle to determine the best treatment option. Immature larvae migrate from intestine abdominal cavity liver bile duct mature adult. 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. It is known as the common liver fluke and causes a disease called fascioliasis. Follow me to a labeled images of fasciola hepatica. Oct 11, 2019 fasciola, lymnaeids and human fascioliasis, with a global overview on disease transmission, epidemiology, evolutionary genetics, molecular epidemiology and control. Reproductive system, life cycle in sheep and snail. Europe, africa, asia, australia, south and central america infection rate. The life cycle of fasciola hepatica is complex and it is completed in two different hosts as it is a digenetic parasite.
Fasciola hepatica the common names are the sheep liver fluke and the common liver fluke. Fasciola hepatica is a zoonotic liver fluke that can cause disease in humans. The disease caused by the fluke is called fascioliasis. The egg the eggs of fasciola hepatica are operculated and average 140. The following are the stages in the life cycle of fasciola. The primary or definite host is sheep or cattle, while the secondary or intermediate host is a small of the genus limnaea. It has been classified as a neglected tropical disease. 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. The disease is a plantborne trematode zoonosis, and is classified as a neglected tropical disease ntd.
In 22 73% patients, the diagnosis of fascioliasis was based on radiological findings on abdominal ct examination and positive iha test. The outer portion of the wall consists of two layers. They are involved in an encysted stage either on vegetation or in a host tissue on the second intermediate host. Description of eggs and larval stages of fasciola, light. Description of eggs and larval stages of fasciola, light and. The trematodes fasciola hepatica also known as the common liver fluke or the sheep liver fluke and fasciola gigantica are large liver flukes f. It is endemic in more than 40 countries, including those in europe, north africa, asia, south america, and the western pacific.
Lymnaeid mud snails are intermediate hosts and release the infective form, the metacercaria, onto herbage. Habitata parasite of herbivorous anim als sheep,goat and cattle, living in. 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. Fasciola hepatica the liver fluke zoology for ias, ifos. The adult parasite is found in the primary host, while a part of its life cycle as larval stages are found in the invertebrate host. Fasciola hepatica en colombia alex javier carmona parasitologia 2012 microbiologia up 22. The life history of the liverfluke fasciola hepatica. 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.
Among domestic animals, the sheep liver fluke fasciola hepatica may cause debilitating and fatal epidemics liver rot in sheep. Infected by eating raw watercress or water plants contaminated by immature larvae. Quizlet flashcards, activities and games help you improve your grades. The life cycle of fasciola hepatica starts when a female lays eggs in the liver of an infected human.
The definite hosts of fasciola hepatica are sheeps, cows, and humans. They have a hard shell and are also involved in the trophic transmission. Whereas the intermediate or secondary host is a snail in which all the larval stages are developed. These animals become infected by eating metacercariae encysted on. Fasciola hepatica sheep liver fluke phylum platyhelminthe class trematoda fasciola gigantica very rarely infects humans. 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 tawar yang berperan sebagai inang sementara. Cercaria larva of fasciola hepatica cercaria larva of fasciola hepatica. Metacercaria larva of fasciola hepatica 20200426 20200426 tagged trematode life cycle stages wikipedia. It infects the livers of various mammals, including humans. 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. Sep 24, 2012 fasciola hepatica en colombia alex javier carmona parasitologia 2012 microbiologia up 21. The life cycle, transmission, morphology, clinical presentation, and treatment of the f. The primary host is sheep in which the adult liver flukes live. Fasciola hepatica simple english wikipedia, the free.
Fasciolahepatica is a common fluke found in the liver and bile ducts of cattle, sheep, goat, pig, rabbit, dog etc. Fasciola hepatica can affect 46 species of wild and domestic animals as well as humans. Hepatic fasciolosis is mainly of economic importance in sheep or cattle, but other species may provide a. Fascioliasis due to fasciola hepatica and fasciola gigantica infection. I will always check wards for parasite specimens before checking elsewhere. Human infection is not common, but occurring worldwidely. Fasciola hepatica study guide by mendi15 includes 43 questions covering vocabulary, terms and more. When encysted metacercaria are swallowed by a human, they excyst in the lumen of the. Fasciola hepatica is a large liver fluke that lives in the bile ducts of its mammalian hosts, which commonly include sheep and cattle.
Fasciola hepatica liver fluke or sheep liver fluke eggs in stool of infected mammals sheepcattle snail aquatic vegetation human. The formation of the cyst wall of the metacercaria of. It causes damage to the liver tissues producing liver rot in all sheep breeding areas of the world. Fasciola hepatica is a trematode parasite in the same family as schistosomes and shares crossreactive antigens with schistosomes. It affects humans, but its main host is ruminants such as cattle and sheep. It is a parasitic trematode fluke or flatworm in the phylum platyhelminthes. 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. Pdf first report of larval stages of fasciola hepatica in a wild. Metacercaria larva of fasciola hepatica pixelmasterdesign.
Bio 462 study guide 2014 bates instructor bates at. 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. Fasciola hepatica, metacercaria slide wards science. 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. My fasciola hepatica metacercaria specimen was the highest quality possible. Thomas capillaria hepatica is a parasitic nematode which causes hepatic capillariasis in rodents and. The cercarias are free larvae actively swimming in the water, where mature after leaving. Fasciolosis is a parasitic worm infection caused by the common liver fluke fasciola hepatica as well as by fasciola gigantica. The lifecycle of fasciola hepatica is completed in two hosts.