The infection rate of Enterobius vermicularis was investigated in 1,070 preschool children aged 5-7 years in Kayseri, Turkey by cellotape anal swab from May-September 2005. The children's parents were asked to complete questionnaires inquiring into the potential risk factors involved. The overall egg positive rate for E. vermicularis was 5.1%. The infection rate among boys and girls was similar. The association between family size, household income/month, education level of the parents, employment status of the mother and enterobiasis were found to be significant.