title: Risk factors for Enterobius vermicularis infection in children in Gaozhou, Guangdong, China.
abstract: BACKGROUND
  Enterobius vermicularis infection is a prevalent intestinal parasitic disease in children. In this study, we explored the epidemiological status and risk factors for E. vermicularis infection in children in southern China.
  
  
  METHODS
  A cross-sectional survey was carried out in Gaozhou city, Guangdong province, China, in December 2011. Children aged 2-12 years from five schools participated in the study. The adhesive cellophane-tape perianal swab method was applied to detect E. vermicularis infection, while a questionnaire was sent to each child's guardian(s) to collect demographic and socioeconomic data, as well as hygiene behaviors, pertaining to each child. Univariate and multivariate logistic regression analyses were performed to capture the potential risk factors.
  
  
  RESULTS
  Out of the 802 children surveyed, 440 were infected with E. vermicularis, with an average prevalence of 54.86 %, and a range from 45.96 to 68.13 %. The age variable was found to be statistically significant, whereas the sex variable was not. It was found that a mother's education level (low) and not washing hands before dinner were major risk factors in all children (802). After stratification by age, a father's education level (primary or below) and biting pencils (or toys) were significant risk factors in the younger children (508), while not washing hands before dinner and playing on the ground were important risk factors in the older children (294).
  
  
  CONCLUSIONS
  This study demonstrates the prevalence of E. vermicularis infection in children in Gaozhou and reveals underlying risk factors. Most importantly, it reveals that risk factors differ among the different age groups, which indicates that different control measures targeted at particular age groups should be implemented.
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborative Center for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025 China.
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Li
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborative Center for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025 China.
authors.forename: Chang-Hai
authors.initials: CH
authors.lastname: Zhou
authors.affiliation: Gaozhou Center for Disease Control and Prevention, Gaozhou, 515200 China.
authors.forename: Zhi-Shi
authors.initials: ZS
authors.lastname: Li
authors.affiliation: Guangdong Center for Disease Control and Prevention, Guangzhou, 510000 China.
authors.forename: Zhuo-Hui
authors.initials: ZH
authors.lastname: Deng
authors.affiliation: Guangdong Center for Disease Control and Prevention, Guangzhou, 510000 China.
authors.forename: Cai-Wen
authors.initials: CW
authors.lastname: Ruan
authors.affiliation: Guangdong Center for Disease Control and Prevention, Guangzhou, 510000 China.
authors.forename: Qi-Ming
authors.initials: QM
authors.lastname: Zhang
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborative Center for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025 China.
authors.forename: Ting-Jun
authors.initials: TJ
authors.lastname: Zhu
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborative Center for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025 China.
authors.forename: Long-Qi
authors.initials: LQ
authors.lastname: Xu
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborative Center for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025 China.
authors.forename: Ying-Dan
authors.initials: YD
authors.lastname: Chen
keywords: Children; China; Enterobius vermicularis; Prevalence; Risk factor