本文选择的治疗对象都是经虫卵计数每克粪便虫卵在500个以上且最近无服药史的感染者。145例中感染多种线虫者102例,感染一种线虫者43例,按虫种计有蛔虫感染91例,美洲钩虫感染71例,鞭虫感染54例。每克粪便虫卵数在2,000个以内者为轻度感染,2,000～10,000个者为中度感染,10,000个以上者为重度感染。治疗对象按剂量分为:200毫克×2/天×2、200毫克×2/天×4、100毫克单剂、200毫克单剂及400毫克单剂五 The subjects selected for this study were all those infected with egg count of 500 eggs per gram of faecal egg and no recent history of medication. Of the 145 cases, 102 were infected with various nematodes, 43 were infected with one nematode, 91 were roundworm infection by bug, 71 were hookworm, 54 were whipworm infection. Mice with a fecal egg count of less than 2,000 are mild infections, 2,000 to 10,000 are moderate infections, and 10,000 or more are severe infections. Subjects were divided into doses: 200 mg x 2 / day x 2,200 mg x 2 / day x 4,100 mg single dose, 200 mg single dose and 400 mg single dose five