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Fasciola gigantica
''Fasciola gigantica'' is a parasitic flatworm of the class Trematoda, which causes tropical fascioliasis. It is regarded as one of the most important single platyhelminth infections of ruminants in Asia and Africa. Estimates of infection rates are as high as 80-100% in some countries. The infection is commonly called fasciolosis.
The prevalence of ''F. gigantica'' often overlaps with that of ''Fasciola hepatica'', and the two species are so closely related in terms of genetics, behaviour, and morphological and anatomical structures that it is notoriously difficult to distinguish them. Therefore, sophisticated molecular techniques are required to correctly identify and diagnose the infection.
== Distribution ==
''Fasciola gigantica'' causes outbreaks in tropical areas of southern Asia, Southeast Asia, and Africa. The geographical distribution of ''F. gigantica'' overlaps with ''Fasciola hepatica'' in many African and Asian countries and sometimes in the same country, although in such cases the ecological requirement of the flukes and their snail host are distinct. Infection is most prevalent in regions with intensive sheep and cattle production. In Egypt ''F. gigantica'' has existed in domestic animals since the times of the pharaohs.〔Soliman M. F. M. (2008). "Epidemiological review of human and animal fascioliasis in Egypt". ''The Journal of Infection in Developing Countries'' 2(3): 182-189. (abstract ). (PDF )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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