肠道蠕虫如蛔虫、毛首鞭虫、钩虫等是发展中国家学龄儿童中最常见的寄生虫感染。据估计全世界大约有 1 0～ 1 5亿人感染肠道蠕虫。近河边的社区 ,通常偏远且交通落后 ,很难引起研究者们的注意。卫生工作人员也不愿到这些地区工作。此外 ,这些社区的饮用水通常只有一个源头 ,而 Intestinal worms such as roundworms, Trichuris trichinae and hookworm are the most common parasitic infections among school-age children in developing countries. An estimated 110 to 150 million people worldwide are infected with gut worms. Near the river community, usually remote and lagging traffic, it is difficult to attract the attention of researchers. Health workers are also reluctant to work in these areas. In addition, there is usually only one source of potable water in these communities, whereas