Abstract:

Objective　To understand the status of Enterobius vermicularis infection among kindergarten children in Puyang City from 2017 to 2019 for evidence to develop scientific prevention and control of this infection.Methods　By stratified sampling,we conducted a series of microscopic examinations for Enterobius vermicularis eggs by anal cellophane tape method in children from 11 kindergartens in Nanle County and Fanxian County of Puyang City from 2017 to 2019. In addition,all children underwent questionnaire survey for the status of deworming in the past half a year during the survey.Results　A total of 1 687 children were screened,which 245(14. 52%) children were detected to be positive for Enterobius vermicularis infection. The infection rate of Enterobius vermicularis in kindergarten children was 11. 73%,15. 22% and 15. 50%,respectively, from 2017 to 2019. The infection was 13. 88% and 15. 50%,respectively in Nanle County and Fanxian County,and the difference was not statistically significant (χ 2 = 0. 856,P>0. 05). Children in rural kindergartens had higher infection rate than those of urban kindergartens(25. 58% vs. 7. 68%,χ 2 = 102. 874,P<0. 05),and the infection rate was higher in children from private kindergartens than in those from public kindergartens(16. 17% vs. 12. 67%,χ 2 = 3. 994,P<0. 05).The infection rate of Enterobius vermicularis was 15. 65% in boys,and 13. 13% in girls. The difference was insignificant (χ 2=2. 131,P>0. 05). Generally,the infection tended to increase with added age and grade (χ 2 =36. 941,χ 2 =31. 007,both P<0. 05). No infection occurred in children of 2 years old or day-care classes,yet the infection rate was the highest in children aged 6 years and preschool children,which was 22. 04% and 30. 14% respectively. Children with a history of deworming within half a year had lower infection rate than those without use of deworming drugs(9. 55% vs. 15. 95%;χ 2 =7. 456, P<0. 05). Conclusion　The infection rate of Enterobius vermicularis appears relatively higher in kindergarten children in Puyang City. The findings suggest that deworming drugs should be recommended,and health education and surveillance should be strengthened in the children in rural areas,particularly in children of higher grade.

Key words: Enterobius vermicularis, Infection, Kindergarten, Children, Puyang City