摘要
作者在一所蛲虫感染率为50～60％的日托幼儿园对一个班级蛲虫感染儿童的蛲虫卵排出情况作了连续19个月的定期观察。发现患儿每次人均采得卵数在1～7月间均维持在30个卵以下,8月份为高峰(285.9个卵),12月份回落,2～3月份为低谷,此后又逐渐回升。为验证,于另一年对另一班级作为期一年的观察。除因感染度差异而绝对值较低外,得到了相似的虫卵消长曲线。此结论为儿童集居机构蛲虫病的防治提供了理论依据。作者对两个幼儿园四个班级104名蛲虫患儿作了肛内采样。检获幼虫者63人,累计阳性率60.58％,1011人次检查中,153人次获幼虫,检出率15.13％,共检获幼虫2142条,平均2.12条/人/次,观察结果表明虫卵自孵成幼虫的全年消长曲线与其虫卵消长曲线相吻合。上述结果有力地支持Schüffner提出蛲虫存在逆回感染(Retroinfection)的观点,并认为是少数患儿难以治愈的主要原因之一。
A continuous 19-month period of observation has been carried out to examine the egg- laying of E. vermicularis in infected children in a class from a day-care kindergarten where the infection rate was 50-60%, From January to July, the number of eggs laid per infected child maintained below 30. In August, the number increased tremendously to a peak of 285.9. It began to decrease in December and reached a minimum in February and March of the following year. Afterwards the number increased gradually again. In order to confirm the results, a year round examination has been done in another class in another year. The curve obtained was similar despite a slight difference in the absolute number of eggs laid per child due to different infection intensities. Samples were taken from the perianal region of 104 children with E. vermicularis in 4 classes in 2 kindergartens. Infected children in one of the classes were examined periodically for one year. Larvae were found in the samples of 63 children (60. 58%). In all, larvae were detected in 153 out of 1011 samples. Total number of larvae found was 2142 with an average of 2. 12/child/time. 20% of the positives were greater than 10. More than 50 larvae were found in the sample of 6 children, the maximum being 354. The curve of hatching larvae coincides with the egg laying curve. The results support Schǚffner's hypothesis of retroinfection of E. vermicularis.
出处
《实用寄生虫病杂志》
1993年第4期17-20,共4页
Journal of Practical Parasitic Diseases
关键词
蛲虫
自孵
卵
感染
儿童
Enterobius vermicularis, egg, self-hatching
