| epidemiology of soil-transmitted nematode infections in ha nam province, vietnam. | baseline epidemiological data are presented from a parasitological survey conducted in thuy loi commune, ha nam province, vietnam; a farming community where night soil is routinely used as fertilizer for crops. 177 households were visited and 543 individuals (aged 1-88 years) recruited to the study. helminth infection intensity was assessed by kato-katz to determine the density of parasite eggs per gram of stool (epg). ascaris lumbricoides, trichuris trichiura and hookworm infections were the on ... | 1998 | 9855404 |