Fasciola hepatica an overview sciencedirect topics. Fasciola hepatica the common names are the sheep liver fluke and the common liver fluke. The life cycle of fasciola hepatica is complex and it is completed in two different hosts as it is a digenetic parasite. Fasciola hepatica simple english wikipedia, the free encyclopedia.
Thioredoxin peroxidase secreted by fasciola hepatica induces the alternative activation of macrophages. Fasciola parasites live as adult flukes in the bile duct and immature eggs go out through feces and grow in fresh. Pronunciation of fasciola hepatica with 1 audio pronunciation, 4 synonyms, 1 meaning, 2 translations, 1 sentence and more for fasciola hepatica. Fasciola hepatica fasciola gigantica distribution fasciola hepatica. Find information such as parasite life cycle, symptoms, diagnosis and treatment as well as pictures and videos. Fasciola hepatica is a topic covered in the johns hopkins abx guide to view the entire topic, please sign in or purchase a subscription official website of the johns hopkins antibiotic abx, hiv, diabetes, and psychiatry guides, powered by unbound medicine. 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 occurs in the liver of a definitive host and its lifecycle is indirect. The adult stage of the liver fluke lives in the liver of infected animals, specifically in the bile ducts. Fasciola hepatica is a flat worm that eats your blood and liver.
Fasciola hepatica simple english wikipedia, the free. Common liver or sheep liver fluke fasciola hepatica life cycle. It is important to get an idea about the fasciola hepatica life cycle to determine the best treatment option. Ppt fasciola hepatica powerpoint presentation free to download id.
Immature eggs are discharged in the biliary ducts and taken out in the feces. Fascioliasis is a worldwide zoonotic infection with fasciola hepatica and fasciola gigantica. Adw doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. The life cycle, transmission, morphology, clinical presentation, and treatment of the f. 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 is a parasitic fluke that lives in the liver. The trematodes fasciola hepatica also known as the common liver fluke or the sheep liver fluke and fasciola gigantica are large liver flukes f. Elucidation of the life cycle of fasciola hepatica skip to main content. Fasciola hepatica life cycle pdf immunology medical specialties. Thousands of new, highquality pictures added every day. The zoonoses are particularly endemic in sheepraising countries and are also endemic in iran. The present work included light and scanning electron microscopic studies of eggs and larval stages of fasciola.
It has been classified as a neglected tropical disease. 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. And when fully matured the miracidium will escape and go into the water where it. Fascioliasis, fasciola hepatica, fasciola gigantica, trematodiasis, neglected tropical diseases, liver fluke. Wild ruminants and other mammals, including humans, can act as definitive hosts as well. Ltruncalula and succinea in which larval development occurs. Find highquality fasciola hepatica stock photos and editorial news pictures from getty images. The life history of fasciola hepatica has been recounted in nearly every textbook of zoology or of parasitology since it was elucidated by r.
Download scientific diagram liver fluke fasciola hepatica life cycle. Fasciola hepatica definition of fasciola hepatica by the. This study showed that eggs of both species have an umbilicuslike invagination at the posterior rounded end of the shell. The aim of this observational study was to assess the prevalence of exposure to f. A sheep harbours about 200 flukes which will produce about 100 million eggs. Compared to other helminths, the lifecycle is complex and involves an intermediate host, the mud snail galba lymnaea truncatula and several free living stages. Life cycle of fasciola hepatica inside and outside of a human or animal body. Fasciola hepatica is a liver fluke that causes fascioliasis, a zoonotic infection that affects. The minimal period for the completion of one entire life cycle is 17 wk. Infective fasciola hepatica larvae penetrate the intestinal wall of the host after ingestion then migrate to the. Fasciola hepatica flatworm parasitic in liver and bile ducts of domestic animals and humans liver fluke trematode, trematode worm, fluke.
It is known as the common liver fluke and causes a disease called fascioliasis. 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. Life history of fasciola hepatica is complicated because of parasitism. Fasciola hepatica article about fasciola hepatica by the. Common liver or sheep liver fluke fasciola hepatica life. Fascioliasis is a parasitic infection typically caused by fasciola hepatica, which is also known as the common liver fluke or the sheep liver fluke. Download premium images you cant get anywhere else. Fasciola hepatica life cycle pdf free download as pdf file. The animal diversity web is an educational resource written largely by and for college students.
The adobe flash plugin is needed to view this content. Fasciola hepatica can affect 46 species of wild and domestic animals as well as humans. Adult flukes may live in the bile ducts of sheep for years. 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. Penetration of the liverfluke, fasciola hepatica into the.
Free swimming cercariae encyst in the skin or flesh of fresh water fish 4 metacercariae in flesh or skin of fresh water. In response to such liver injury, inflammatory cells such as macrophages are driven to produce oxygenderived free. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. Lets touch on the life cycle of a fasciola hepatica and fasciola gigantica. Description of eggs and larval stages of fasciola, light.
The life cycle of fasciola hepatica starts when a female lays eggs in the liver of an infected human. 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 stock pictures, royaltyfree photos. Download scientific diagram life cycle of fasciola hepatica. Fasciola hepatica sheep liver fluke phylum platyhelminthe class trematoda fasciola gigantica very rarely infects humans. The disease caused by the fluke is called fascioliasis. Ch09 life sciences, botany, zoology, bioscience 12,772. Fascioliasis due to fasciola hepatica and fasciola gigantica. 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. It will take one to two weeks for the miracidium in the egg to develop fully. 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. Epidemiology and impact of fasciola hepatica exposure in.
The trematodes fasciola hepatica the sheep liver fluke and fasciola gigantica, parasites of herbivores that can infect humans accidentally. Immature fasciola eggs are discharged in the biliary ducts and in the stool 1. People usually become infected by eating raw watercress or other water plants contaminated with immature parasite larvae. Both species infect the liver tissue of a wide variety of mammals, including humans, in a condition known as fascioliasis. Adult fasciola live in bile ducts producing eggs that are excreted with the feces. Many mammals, including sheep, cattle, rodents, marsupials and humans, can act as definitive hosts. Adult fluke lay eggs which are passed along the bile ducts and into the intestine, where they are excreted in dung. Fasciola hepatica life cycle 1 unembryonated eggs passed in feces 2 embryonated eggs in water. Fasciola hepatica and fasciola gigantica, as well as hybrids between the two species. Fasciola, commonly known as the liver fluke, is a genus of parasitic trematodes.
Pdf fasciola and fasciolosis in ruminants in europe. The primary host is sheep in which the adult liver flukes live. Life cycle fasciola hepatica requires two hosts to complete it life cycle. 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. Definitive hosts of the fluke are cattle, sheep, and buffaloes. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Fasciola hepatica synonyms, fasciola hepatica pronunciation, fasciola hepatica translation, english dictionary definition of fasciola hepatica. Adult fasciola are captured in the bile passage of sheep or many reproduce by parthenogenesis. Fasciola hepatica definition of fasciola hepatica by.
1451 115 1380 1357 848 1396 714 348 470 1456 511 78 297 1232 826 650 671 1307 525 852 574 599 361 1136 300 729 1161 220 108 334 465 148 111 73 872 426 681 1035 641 61 504 467 1304 956 713 1487