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[Surveillance of soil-transmitted nematode infections in Menghai County, Yunnan Province from 2006 to 2009].

In the national monitoring point, Menghai County, Yunnan Province, the total prevalence rate of soil-transmitted nematode infections was 88.12%, of which the rates of Ascaris lumbricoides, Trichuris trichiura, hookworm and cestode infections were 69.70%, 59.79%, 36.79%, and 1.30% respectively from 2006 to 2009. The infection intensities were slight. The Ascaris lumbricoides infection rate in soil of vegetable garden was 44.5%. In conclusion, the infection rate of soil-transmitted nematodes is high in the monitoring point.