Assessment of the Transmission Risk of Schistosomiasis After Flooding - North Poyang Lake, Jiangxi Province, China, 2020

Over 90% of snails, the only intermediate host of , are distributed in the middle and low reaches of Yangtze River. Flooding can extend the distribution of snails and hence accelerate the transmission of schistosomiasis. Although the dispersal of snails was negligible in north Poyang Lake after flooding in 2020, 2 samples of cattle feces with egg and 2 infected snails samples were indeed found. All four risk sites were distributed in Lushan County. Cattle feces were observed in the six out of seven field sites in Lushan County. The present national control strategy focusing on control of infection source should be reinforced in Lushan and other schistosomiasis endemic areas. Overlaps of infected snails and cattle feces with egg were not observed, which called for intensive surveillance in Lushan County.