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Opisthorchiasis is a parasitic disease caused by species in the genus Opisthorchis (specifically, ''Opisthorchis viverrini'' and ''Opisthorchis felineus''). Medical care and loss of wages caused by ''Opisthorchis viverrini'' in Laos and in Thailand costs about $120 million annually〔Muller R. & Wakelin D. (2002). ''Worms and human disease''. CABI. (page 43 )-44.〕 or $120 million per year can cost Northeast Thailand only. Infection of ''Opisthorchis viverrini'' and of other liver flukes in Asia affect the poor and poorest people.〔 Opisthorchiasis has received less attention than other diseases and is a neglected disease in Asia.〔.〕 == Symptoms== (詳細はclonorchiasis (caused by ''Clonorchis sinensis''),〔 so the disease should be referred as clonorchiasis.〔 About 80% of infected people have no symptoms, though they can have eosinophilia.〔 This is when the infection is weak and there are less than 1000 eggs in one gram in feces.〔 When there are 10.000-30.000 eggs in one gram of feces, then the infection is heavy.〔 Symptoms of heavier infections with ''Opisthorchis viverrini'' may include: diarrhoea, pain in epigastric and pain in the upper right quadrant, lack of appetite (anorexia), fatigue, yellowing of the eyes and skin (jaundice) and mild fever.〔 These parasites are long-lived and cause heavy chronic infections may led to accumulation of fluid in legs (edema) and in the peritoneal cavity (ascites),〔 enlarged non-functional gall-bladder〔 and also cholangitis, which can lead to periductal fibrosis, cholecystitis and cholelithiasis, obstructive jaundice, hepatomegaly and/or fibrosis of the periportal system. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「opisthorchiasis」の詳細全文を読む スポンサード リンク
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