Epidemiological Studies on Enterobiasis carried out in One of The Public Nursery (I)

Abstract

Successive epidemiological study on enterobiasis using similar methods as Shizuka.Mura's survey was carried out among children in one of public nursery and their families during one month from March to April, in 1957. Among 83 (52.53%) persons out of 158 belonging to 34 families examined, pin worm eggs were detected. The high rates were seen among the children belonging to the year group of 5 to 9 and the females of 30 to 39. Correlations of infection between child and mother or father existed and remarkable familial aggregation was observed. But no significant correlations were seen between positive rate and frequency of bathing rate, changing underwears, or sexes Only, suspicious condition or circumstance related to the high positive rate observed among persons (52.53% in general and 80.95% in younger children) were space of the bed room and limited envilonment. Although no remarkable differences were observed in the space of the bed room of non infected and infected families, average number of Tatami, Japanese rice straw mattless, in bed room of the families examined was 1.527, while national standard was 3.7 in 1952. Thus smaller space of bed room may cause the high rate of infection in this survey. From epidemiological observations mentioned above, such as relation between children and their parents, or high rate observed in early school year children, the individual contact in a broad sense may be the most important cause of infection.