| low risk for helminth infection in wastewater-fed rice cultivation in vietnam. | this study was done to assess the risk of helminth infection in association with wastewater-fed rice cultivation in an agricultural setting of nam dinh city, vietnam. in a cross sectional survey data were collected for 202 households in a commune where wastewater was used for irrigation and for 201 households in a commune that used river water. parasitological examination was conducted on single stool samples obtained from 1,088 individuals aged -15 years from the households. the irrigation wate ... | 2006 | 17036840 |