In addition to humans it infects cows and sheep. It is known as the common liver fluke and causes a disease called fascioliasis. The life cycle of Fasciola hepatica starts when a female lays eggs in the liver of an infected human. Immature eggs are discharged in the biliary ducts and taken out in the feces. If landed in water, the eggs become embryonated and develop larvae called miracidia. A miracidium invades an aquatic snail and develops into cercaria, a larva that is capable of swimming with its large tail.
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No special status Other Comments In countries that Fasciola gigantica is present, the prevalence of infected animals is extremely high. Sobhon, et al. Glossary living in sub-Saharan Africa south of 30 degrees north and Madagascar. Palearctic living in the northern part of the Old World. In otherwords, Europe and Asia and northern Africa.
Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
For example, diseases caused by infection of filarial nematodes elephantiasis and river blindness. In other words, India and southeast Asia. Attached to substratum and moving little or not at all. Synapomorphy of the Anthozoa sexual reproduction that includes combining the genetic contribution of two individuals, a male and a female swamp a wetland area that may be permanently or intermittently covered in water, often dominated by woody vegetation.
Parasites and Health. Cheesbrough, M. Cambridge, England: Cambridge University Press. Dangprasert, T. Khawsuk, A. Meepool, C. Wanichanon, V. Viyanant, E. Upatham, S. Wongratanacheevin, P. Fasciola gigantica: Surface topography of the adult tegument. Journal of Helminthology, Johnson, P. Diversity, decoys and the dilution effect: How ecological communities affect disease risk. Journal of Experimental Biology, Kumar, V. Trematode Infections and Diseases of Man and Animals.
Miliotis, M. International Handbook of Foodborne Pathogens. Read, C. Animal Parasitism. Saleha, A. Liver fluke disease fascioliasis : Epidemiology, economic impact and public health significance. Sobhon, P. Dangprasert, S. Chuanchaiyakul, A. Meepool, W. Khawsuk, C. Fasciola gigantica: Ultrastructure of the adult tegument. Science Asia,
Fasciola Hepatica - Liver Fluke
Distribution[ edit ] Fasciola gigantica causes outbreaks in tropical areas of southern Asia, Southeast Asia, and Africa. The geographical distribution of F. Infection is most prevalent in regions with intensive sheep and cattle production. In Egypt F.
Resources Causal Agent The trematodes Fasciola hepatica also known as the common liver fluke or the sheep liver fluke and Fasciola gigantica are large liver flukes F. Although F. These forms usually have intermediate morphologic characteristics e. Further research into the nature and origin of these forms is ongoing. Life Cycle Immature eggs are discharged in the biliary ducts and passed in the stool.
Causal Agent The trematodes Fasciola hepatica also known as the common liver fluke or the sheep liver fluke and Fasciola gigantica are large liver flukes F. Although F. These forms usually have intermediate morphologic characteristics e. Further research into the nature and origin of these forms is ongoing. Life Cycle Immature eggs are discharged in the biliary ducts and passed in the stool. In the snail, the parasites undergo several developmental stages sporocysts , rediae , and cercariae. The cercariae are released from the snail and encyst as metacercariae on aquatic vegetation or other substrates.