Fascioliasis is a parasitic infection typically caused by fasciola hepatica, which is also known as the common liver fluke or the sheep liver fluke. The life cycle of fasciola hepatica is complex and it is completed in two different hosts as it is a digenetic parasite. Ppt fasciola hepatica powerpoint presentation free to. Fasciola hepatica the common names are the sheep liver fluke and the common liver fluke. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh. Fasciola hepatica definition of fasciola hepatica by the. Pronunciation of fasciola hepatica with 1 audio pronunciation, 4 synonyms, 1 meaning, 2 translations, 1 sentence and more for fasciola hepatica. People usually become infected by eating raw watercress or other water plants contaminated with immature parasite larvae. Penetration of the liverfluke, fasciola hepatica into the. 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. Common liver or sheep liver fluke fasciola hepatica life.
Compared to other helminths, the lifecycle is complex and involves an intermediate host, the mud snail galba lymnaea truncatula and several free living stages. The minimal period for the completion of one entire life cycle is 17 wk. Epidemiology and impact of fasciola hepatica exposure in. Fascioliasis is a worldwide zoonotic infection with fasciola hepatica and fasciola gigantica. Common liver or sheep liver fluke fasciola hepatica life cycle. The liver fluke fasciola hepatica is a trematode parasite with a worldwide distribution and is the cause of important production losses in the dairy industry. Fasciola hepatica article about fasciola hepatica by the. Fasciola hepatica occurs in the liver of a definitive host and its lifecycle is indirect.
Thioredoxin peroxidase secreted by fasciola hepatica. The aim of this observational study was to assess the prevalence of exposure to f. Fascioliasis due to fasciola hepatica and fasciola gigantica. In response to such liver injury, inflammatory cells such as macrophages are driven to produce oxygenderived free. Find information such as parasite life cycle, symptoms, diagnosis and treatment as well as pictures and videos. Eggs become embryonated in water 2, eggs release miracidia 3, which invade a suitable snail intermediate host 4, including the genera galba, fossaria and pseudosuccinea.
Fasciola hepatica synonyms, fasciola hepatica pronunciation, fasciola hepatica translation, english dictionary definition of fasciola hepatica. It is important to get an idea about the fasciola hepatica life cycle to determine the best treatment option. Fasciola hepatica definition of fasciola hepatica by. Wild ruminants and other mammals, including humans, can act as definitive hosts as well. 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. Elucidation of the lifecycle of fasciola hepatica nature. The animal diversity web is an educational resource written largely by and for college students. Fasciola hepatica stock pictures, royaltyfree photos. Fasciola hepatica an overview sciencedirect topics. The life history of fasciola hepatica has been recounted in nearly every textbook of zoology or of parasitology since it was elucidated by r. With increased travel, open free trade, coupled with economic activities, and ruralurban human migration, fascioliasis is set to become a major disease of interest in public health, travel, and trade medicine 15, 4548. Fasciola hepatica life cycle pdf free download as pdf file. Morphology fasciola is a flattened, pinkish, leaflike and bilaterally symmetrical animals, about 2530 mm in length and somewhat rounded on anterior side into a conical projection and posterior end is pointed to form the oral cone or head lobe, bearing at its tip a mouth. Fasciola hepatica flatworm parasitic in liver and bile ducts of domestic animals and humans liver fluke trematode, trematode worm, fluke.
Fasciola, commonly known as the liver fluke, is a genus of parasitic trematodes. It is a parasitic trematode fluke or flatworm in the phylum platyhelminthes it infects the livers of various mammals, including humans. Fasciola hepatica life cycle 1 unembryonated eggs passed in feces 2 embryonated eggs in water. Description of eggs and larval stages of fasciola, light. A sheep harbours about 200 flukes which will produce about 100 million eggs.
Ltruncalula and succinea in which larval development occurs. Find common liver sheep liver fluke fasciola stock images in hd and millions of other royalty free stock photos, illustrations and vectors in the shutterstock collection. Life cycle fasciola hepatica requires two hosts to complete it life cycle. Fasciola hepatica sheep liver fluke phylum platyhelminthe class trematoda fasciola gigantica very rarely infects humans. Adult fasciola live in bile ducts producing eggs that are excreted with the feces. Thioredoxin peroxidase secreted by fasciola hepatica induces the alternative activation of macrophages. Fasciola hepatica life cycle pdf immunology medical specialties. Fasciola hepatica and fasciola gigantica, as well as hybrids between the two species. It has been classified as a neglected tropical disease. Elucidation of the life cycle of fasciola hepatica skip to main content.
The disease caused by the fluke is called fascioliasis. Fascioliasis, fasciola hepatica, fasciola gigantica, trematodiasis, neglected tropical diseases, liver fluke. Miracidium larva is a minute, oval and elongated, freeswimming stage, it is covered with 18 to 21 flat. Find highquality fasciola hepatica stock photos and editorial news pictures from getty images. Fasciola hepatica can affect 46 species of wild and domestic animals as well as humans. Fasciola hepatica simple english wikipedia, the free. Adw doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Both species infect the liver tissue of a wide variety of mammals, including humans, in a condition known as fascioliasis. Life cycle of fasciola hepatica inside and outside of a human or animal body. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. Download scientific diagram liver fluke fasciola hepatica life cycle. Whereas the intermediate or secondary host is a snail in which all the larval stages are developed. Immature fasciola eggs are discharged in the biliary ducts and in the stool 1. The zoonoses are particularly endemic in sheepraising countries and are also endemic in iran.
Fasciola hepatica is a parasitic fluke that lives in the liver. The life cycle, transmission, morphology, clinical presentation, and treatment of the f. Adult fasciola are captured in the bile passage of sheep or many reproduce by parthenogenesis. Immature eggs are discharged in the biliary ducts and taken out in the feces. Download premium images you cant get anywhere else. It is known as the common liver fluke and causes a disease called fascioliasis. Ppt fasciola hepatica powerpoint presentation free to download id. 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. The adobe flash plugin is needed to view this content. Adult flukes may live in the bile ducts of sheep for years. Definitive hosts of the fluke are cattle, sheep, and buffaloes. The present work included light and scanning electron microscopic studies of eggs and larval stages of fasciola. The trematodes fasciola hepatica also known as the common liver fluke or the sheep liver fluke and fasciola gigantica are large liver flukes f. Life history of fasciola hepatica is complicated because of parasitism.
It will take one to two weeks for the miracidium in the egg to develop fully. The adult stage of the liver fluke lives in the liver of infected animals, specifically in the bile ducts. The miracidium larva is free living and is structurally adapted to seek out an intermediate host, a snail limnaea, which is found conveniently in water and damp places in grass in wide areas where. Fasciola hepatica is a flat worm that eats your blood and liver. Thousands of new, highquality pictures added every day. Free swimming cercariae encyst in the skin or flesh of fresh water fish 4 metacercariae in flesh or skin of fresh water. And when fully matured the miracidium will escape and go into the water where it. Download scientific diagram life cycle of fasciola hepatica. Infective fasciola hepatica larvae penetrate the intestinal wall of the host after ingestion then migrate to the. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Pdf fasciola and fasciolosis in ruminants in europe.
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