Fasciola hepatica is a parasitic fluke that lives in the liver. In humans, maturation from metacercariae into adult flukes usually takes about 34 months. Fasciola hepatica has succeeded in expanding from its european original geographical area to colonize five continents, despite theoretical restrictions related to its biology and in turn dependent upon environmental and human activities. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh. Infections due to fasciola gigantica occur mainly in cattle raising areas and cause clinical symptoms similar to those of fasciola hepatica although human infections are less common. 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. Leuckartthomos reported the life cycle of liver fluke in snail. Aspects of the maintenance of the life cycle of fasciola hepatica in lymnaea columella in minas gerais, brazil. The liver fluke is a species of parasitic flat worm that infects mammals. Winner of the standing ovation award for best powerpoint templates from presentations magazine.
Prevalence, risk factors and spatial analysis of liver fluke. Clonorchis sinensis, fasciola gigantica, fasciola hepatica, opisthorchis felineus, opisthorchis viverrini, and paragonimus spp. Pdf which species is in the faeces at a time of global. This size cannot be explained by genome duplication or expansion of a single repeat element, and. Fasciola hepatica, a trematode parasite liver fluke, infects a wide range of host species. Adult fasciola are captured in the bile passage of sheep or many reproduce by parthenogenesis. Immature larvae migrate from intestine abdominal cavity liver bile duct mature adult. Economically important infections are seen in cattle, sheep, alpacas, and llamas in three forms. As a typical digenetic trematode, the adult fluke is hermaphroditic, exhibiting two highly branched testes located one behind the other in the posterior half of the body, and a single dendritic ovary, located on the left of the uterus, as viewed from the ventral surface. Elucidated the mode of transmission of the parasites to herbivores. Trematodes clonorchis sinensis and fasciola hepatica. In humans, fascioliasis a disease caused by a hepatic ligation occurs rarely.
The people, animals and their zoonoses paz project investigates the role played by pigs in transmitting zoonotic diseases and the risk factors for human infection in western kenya photo credit. Studies on the lifecycle of fasciola hepatica linnaeus and of its. It infects the livers of various mammals, including humans. Start studying trematodes clonorchis sinensis and fasciola hepatica. Light infections due to fasciola hepatica may be asymptomatic.
It affects livestock and causes loss of live weight, reduction in milk yield and death of animals. Fasciola hepatica and fasciola gigantica are the two liver flukes commonly reported to cause fascioliasis in ruminants. Fasciola hepatica may be acquired by man, but not directly from cattle. It completes its life history in sheep and fresh water snail. Which species is in the faeces at a time of global. It is known as the common liver fluke and causes a disease called fascioliasis.
The trematodes fasciola hepatica also known as the common liver fluke or the. 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. Flukes are parasitic flatworms that infect various parts of the body eg, blood vessels, gastrointestinal tract. Case report diagnosis and management of hepatic fascioliasis. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Fasciola hepatica, or common liver fluke, is the agent of fascioliasis, a disease. Immature fasciola eggs are discharged in the biliary ducts and in the stool 1. Fasciola hepatica life cycle fascioliasis is infection with the liver fluke fasciola hepatica, which is acquired by eating contaminated watercress or other water plants. They are able to produce both sexually and asexually. Immature eggs are discharged in the biliary ducts and taken out in the feces. Fasciola hepatica linnaeus, 1758 solange 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. Sep 28, 2016 the electronic search strategy was as follows. Pdf aspects of the maintenance of the life cycle of.
The disease caused by the fluke is called fasciolosis or fascioliasis, which is a type of helminthiasis and has been classified as a neglected. Many mammals, including sheep, cattle, rodents, marsupials and humans, can act as definitive hosts. Additional notes on the growth of fasciola hepatica l. The source of helminthiosis is affected by fasciola. C this article has been rated as cclass on the projects quality scale. Fasciola hepatica is a trematode or fluke also known as the sheep liver fluke all trematodes are parasitic all trematodes have a phase of their life cycle in snail or other molluscan host. Adult flukes shed eggs which pass down bile duct into intestines then deposited onto pasture in faeces adult flukes can shed thousands of eggs per day common in wet regions because the life. It is found worldwide, and within the uk, with its prevalence ever increasing. Fasciola hepatica sheep liver fluke phylum platyhelminthe class trematoda fasciola gigantica very rarely infects humans. Using a panel of serum from fasciola hepaticainfected patients and from uninfected controls we have optimized an enzymelinked immunosorbent assay elisa which employs a recombinant form of the major f. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh water. A growing protein demand has the potential to facilitate the translocation of parasites from endemic to nonendemic areas, via.
Adult liver flukes, which are about 10 mm wide and 25 mm long, live in the bile duct, feeding on blood, bile and epithelial cells. In the chronic phase of the infection from the adult parasite, symptoms result from the intermittent blockage of the bile duct and inflammation. Learn vocabulary, terms, and more with flashcards, games, and other study tools. If landed in water, the eggs become embryonated and develop larvae called miracidia. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Life cycle of fasciola hepatica and fasciola gigantica. Fasciola hepatica can affect 46 species of wild and domestic animals as well as humans. The former pages history now serves to provide attribution for that content in the latter page, and it must not be deleted so long as the latter page exists.
Fasciola hepatica is a trematode parasite in the same family as schistosomes and shares crossreactive antigens with schistosomes. Fasciola hepatica study guide by equuspuella includes 10 questions covering vocabulary, terms and more. We examined the ability of the elisa test to discern. Sep 16, 2012 cycle of events in fasciola hepatica the life cycle of fasciola hepatica starts when a female lays eggs in the liver of an infected human. Studies on the lifecycle of fasciola hepatica linnaeus and of its snail host, limnaea galba truncatula muller, in the field and under. Fasciolahepatica is a common fluke found in the liver and bile ducts of cattle, sheep, goat, pig, rabbit, dog etc. Mid this article has been rated as midimportance on the projects importance scale.
It causes damage to the liver tissues producing liver rot in all sheep breeding areas of the world. Life cycle of fasciola hepatica inside and outside of a human or animal body. Liver fluke disease fasciolosis is caused by the trematode parasite fasciola hepatica. The life cycle, transmission, morphology, clinical presentation, and treatment of the f. Fasciola hepatica an overview sciencedirect topics. The life cycle of the common liver fluke, fasciola hepatica was. Aspects of the maintenance of the life cycle of fasciola.
Adults are hermaphroditic and are capable of both crossfertilization and self. In this part, the major research aims on population biology should be. Nov, 2015 life cycle fasciola hepatica requires two hosts to complete it life cycle. Human cases have been reported in parts of asia and africa, as well as in hawaii and iran. Disease can result from the migration of large numbers of. Ercp reveals distinct features, and sp hincterotomy allows for the extraction of multiple fasciola hepatica 17.
Fasciola hepatica is an hepatic parasite of the class trematoda, found mainly in ruminants, namely cows, sheep and goats, but also known to affect horses, pigs, deer and man. Fascioliasis is caused by two species of parasitic flatworms or trematodes that mainly affect the liver. The results of these experiments indicate that the 4th and 5th weeks of infection represent a critical. The life cycle of fasciola hepatica starts when a female lays eggs in the liver of an infected human. Fasciola hepatica fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic flatworm of the class trematoda, phylum platyhelminthes that infects the livers of various mammals, including humans. Controversial aspects of the life cycle of fasciola hepatica.
Fasciola hepatica infection risk in new zealand with future. Text andor other creative content from this version of fasciola hepatica and tuberculosis was copied or moved into fasciola hepatica with this edit on 14 may 2015. Fasciolosis, caused by fasciola hepatica and fasciola gigantica, is a globally distributed zoonotic disease of livestock. Adult liver flukes recovered from an infected bovine liver. Fasciola hepatica is within the scope of wikiproject animals, an attempt to better organize information in articles related to animals and zoology. Ltruncalula and succinea in which larval development occurs. Definitive hosts of the fluke are cattle, sheep, and buffaloes. Fasciola hepatica invertebrate zoology virtual collection. In addition, morphological analysis showed that the ratios of body length and body width of some n 5 of the 19 examined f. Fasciola hepatica occurs in the liver of a definitive host and its lifecycle is indirect. 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. Infected by eating raw watercress or water plants contaminated by immature larvae. Foodborne trematodiases are an emerging public health problem in southeast asia and latin america, and are caused by the following flukes. During the movement of the immature stage of fasciola hepatica, which may continue for months, symptoms may include abdominal pain, an enlarged liver, fever, vomiting and diarrhea.
It is important to get an idea about the fasciola hepatica life cycle to determine the best treatment option. The search term was adapted to the predominate language of the database. Having validated its ability to predict risk it was then possible to combine this. In galba truncatula, the destruction of the gonad can be total in onethird of snails if a single or several rediae penetrate this gland and develop until they have ingested the whole contents 11, 17. Fasciola gigantica is mainly found in tropical and subtropical regions. Fasciola hepatica liver fluke or sheep liver fluke eggs in stool of infected mammals sheepcattle snail aquatic vegetation human.
The trematodes fasciola hepatica also known as the common liver fluke or the sheep liver fluke and fasciola gigantica are large liver flukes f. The liver fluke fasciola hepatica is a major pathogen of livestock worldwide, causing huge economic losses to agriculture, as well as 2. Patterns in size and shedding of fasciola hepatica eggs by naturally and experimentally infected murid rodents pdf. Epidemiology of fascioliasis in human endemic areas. Ppt fasciola hepatica powerpoint presentation free to.
The adult worm averaging 30mm in length and mm in width, fasciola hepatica is one of the largest flukes in the world. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Wild ruminants and other mammals, including humans, can act as definitive hosts as well. Life cycle fasciola hepatica requires two hosts to complete it life cycle. Association of fasciola hepatica infection with liver. The development of fasciola hepatica within its intermediate host causes parasitic castration of the snail. Fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic. The disease caused by the fluke is called fascioliasis also kn.
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