We examined on parasite infestation 8101 pupils of 14 elementary and 9 junior high schools at Miyako-Island in Ryukyu.
About 60% of pupils of these schools underwent our examination.
These 23 schools were divided into 3 groups such as urban are, rural area, and fishing villages.
It was found that the incidence of ascaris infection among the pupils lived at fishing villages was the highest (32.6%), and that the incidence of the ancylostomiasis among the pupils in rural area was the highest (25.3%), especially the hookworn incidence of the pupils of rural janior high school showed very high.
About the enterobiasis, there is no differrnce among these 3 groups.
