1961年12月我们检查了637名本校学生的粪便。每份材料作二张生理盐水和一张碘液塗片。共查见12种寄生虫,结果见表一。其中分别感染1种至5种寄生虫者共计457名(71.74％),未查见寄生虫者180名(28.26％),参见表二。此次所检查学生的籍贯多数(73.31％)是吉林省,一部分(19.08％)是黑龙江、辽宁、山东和河北等地,少数(7.60％)未登记籍贯。但全部学生在本市居住至少已有一年半。 In December 1961 we examined the excrement of 637 students from our school. Make two normal saline and one iodine smear for each piece of material. A total of 12 parasites were found, the results shown in Table I. Among them, 457 (71.74%) were infected with 1 to 5 parasites and 180 (28.26%) were not detected with parasites, respectively. The majority of students (73.31%) were from Jilin Province and a minority (19.08%) were from Heilongjiang, Liaoning, Shandong and Hebei. A minority (7.60%) did not register their native places. However, all students have lived in the city for at least a year and a half.