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为观察三缸组合厕所预防肠寄生虫感染效果，于１９８９～１９９３年对德清县莫干山乡建厕村和对照村人群进行了前瞻性队列研究。结果表明：在阳性者驱虫治疗２年后，建厕村人群的肠线虫感染率显著低于对照村人群（χ２＝７．０９，Ｐ＜０．０１）。无洗手习惯、有吃生食习惯的建厕村人群肠线虫感染率明显低于对照村相同习惯人群，是否用新鲜粪施肥、赤脚劳动习惯和厕所运行状况与人群肠线虫感染有显著联系。总之，三缸厕所预防肠线虫感染有一定效果，但不是决定性和唯一因素
To observe the effect of three-tank combination toilet in preventing intestinal parasites infection, a prospective cohort study was conducted on the population of toilet latrine and control villages in Moganshan Township, Deqing County from 1989 to 1993. The results showed that after 2 years of positive deworming treatment, the infection rate of intestinal nematode in toilet-building village was significantly lower than that in control village (χ2 = 7.09, P <0.01). The infection rate of gut nematodes among the village residents who eat raw food was significantly lower than that of the same habitants in the control village, whether fresh manure was used, bare-bones labor habits and toilet running status were significantly associated with intestinal nematode infection. In short, the three-cylinder toilet to prevent intestinal nematode infection have some effect, but not the decisive and the only factor