Schistosoma is parasitic on humans and mammals. The eggs produced by adults are discharged with feces, and cercariae hatch in water; Cercaria burrows into snails and develops into cercaria. The cercaria leaves the snail and swims into the water. When they meet people and animals, they enter the body through the skin (mucous membrane) and develop into adults. This cycle leads to the spread and epidemic of schistosomiasis.
What are the symptoms? Clinical manifestations of schistosomiasis include rash, fever, abdominal pain, diarrhea, hepatosplenomegaly, etc. Chronic phase: asymptomatic or chronic diarrhea or dysentery.
Schistosoma japonicum is mainly distributed in 346 counties (cities, districts) in Shanghai, Jiangsu, Zhejiang, Jiangxi, Fujian, Anhui, Hubei, Hunan, Sichuan, Yunnan, Guangxi, Guangdong and other provinces, autonomous regions and municipalities directly under the Central Government. Epidemic situation: more than 20,000 patients120,000, sick cattle and snails120,000,1480 million m? Cattle.
So how do we prevent schistosomiasis?
Schistosoma japonicum infects humans through contact with ordinary water. Therefore, avoiding or reducing contact with infected water in production and life is the most effective method to prevent schistosomiasis.
Residents can use tap water, well water, etc. For daily use, do not drink unsterilized pond and ditch water. If the water is heated above 60 (the temperature when it feels hot), the cercariae in the water will be killed; 1g bleaching powder, 15ml 3% tincture of iodine or 12.5g quicklime can be added into 50kg water to kill cercariae.
Develop good hygiene habits: people and animals should not excrete feces in places with snails to prevent feces from polluting water sources and ensure the safety of drinking water.