Schistosomiasis of Japan

Schistosomiasis japonica is a disease caused by the parasitism in the portal vein system. Infected by skin contact with cercariae-containing epidemic water, the main lesions are granulomas caused by worm eggs in the liver and colon. In the acute phase, fever, hepatomegaly and tenderness accompanied by diarrhea or purulent bleeding in the stool and blood eosinophils significantly increased; in the chronic phase, hepatosplenomegaly was the main disease; in the later period, the fibrotic lesions around the portal vein were the main cause and developed into the portal vein. Hypertension, giant spleen and ascites. Schistosomiasis of Japan is the most serious parasitic disease that endangers the health of farmers in China. It is mainly distributed in the Yangtze River Basin and 12 provinces, cities, and autonomous regions in the south of China. Seriously affect human health and animal husbandry production. After the founding of New China, after decades of large-scale systematic prevention and control, good results have been achieved. In recent years, the epidemic situation has picked up in many regions. At present, it is still in the epidemic state, mainly in the areas of unreliable rivers and lakes in Hubei, Hunan, Jiangxi, Anhui, and Jiangsu, and the mountainous areas with complex environments in Sichuan and Yunnan. Whenever there is a flood, small-scale outbreaks of acute schistosomiasis are common.

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