[Investigation on epidemic factors after schistosomiasis transmission controlled in Lushan County]

To explore schistosomiasis endemic factors in large mountainous areas where schistosomiasis transmission has been controlled.

Qingjiang Village, Lushan County, Sichuan Province, a alpine "Pingba" type of large mountain area, Wuxing Village, a alpine hilly type of large mountainous area, and Huoju Village, a alpine canyon type of large mountainous area were selected as study areas, and the agricultural structure, health facilities, and human behavior were investi-gated. The Oncomelania snail status was surveyed by using the system sampling method combined with the environmental sampling method. The schistosome infections of population were investigated with the serum immunology method and stool hatching method, and the schistosome infections of cattle and dogs were investigated with the plastic cup top tube hatching method.

There was a traditional agricultural structure in these villages, and the coverage rates of harmless toilets were 23.20%, 41.17%, and 41.64% in Qingjiang Village, Wuxing Village, and Huoju Village, respectively; the safe drinking water rates were 100%, 100% and 99.16% in the aforementioned villages, respectively; the rates of using ditch water for life were 22.99%, 0 and 0.85% in the aforementioned villages, respectively. The snails, wild feces, and the infection of cattle were not found. The schistosome infection rates of residents were 0.18%, 0.15%, and 6.26% in the aforementioned villages, respectively; the schistosome infection rates of dogs were 0, 0 and 2.41% in the aforementioned villages respectively. The infection rates of field rodents were all zero in the aforementioned villages.

We should strengthen the schistosomiasis monitoring of people and cattle, strengthening the monitoring of other infectious sources, and develop a targeted snail control method in Lushan County.