https://www.selleckchem.com/products/cct241533-hydrochloride.html To analyze the monitoring data of s in the national schistosomiasis surveillance sites of China from 2015 to 2019, so as to understand the changes of snail status in the schistosomiasis-endemic areas of China and to provide the scientific evidence for snail control. According to the requirements of ( ), national schistosomiasis surveillance sites were assigned in all schistosomiasis-endemic counties (cities, districts) and the potential endemic counties (cities, districts) in the Three Gorges Reservoir areas, and snail status was monitored according to different epidemic types. In endemic areas, snail survey was performed by means of systematic sampling and environmental sampling, and the occurrence of frames with snails and the prevalence of infections in snails were calculated, while in potential endemic areas, the risk of imported snails and snails in floating debris were monitored. snail survey was performed covering an area of 116 834.16 hm in the national schistrise in the area of Oncomelania snail habitats year by year, and LAMP assay identified positive Oncomelania snail samples, suggesting Oncomelania snail control is far from optimistic in China. To understand the morbidity due to in national schistosomiasis surveillance sites of China from 2015 to 2019, so as to provide insights into schistosomiasis control and elimination and provide the scientific evidence for formulating the new scheme for schistosomiasis surveillance in China. According to the requirements of ( ), national schistosomiasis surveillance sites were assigned in all schistosomiasis-endemic counties (cities, districts) and the potential endemic counties (cities, districts) in the Three Gorges Reservoir areas, and infections were monitored in local residents, mobile populations and livestock according to different epidemic types. The sero-prevalence of infections, adjusted prevalence of human infections, characteristics of egg