Introduction & Objective:  Contamination with enteral parasites is one of the important sanitary and social problems in most developing countries. The aim of this descriptive study was to determine the contamination rate in children between 1 – 6 with oxyure and giardia in kindergartens and welfare centers of Tehran in 2004.

Materials and Methods:  Purposive sampling method was used to select subjects from centers located in north east, north west, central, southeast and south west parts of the city in proportion with the population. Accordingly, 341 children (175 from kindergartens and 176 from welfare centers) were selected 81 girls and 95 boys as well as 78 girls and 97 boys formed the subjects from the two types of centers respectively. Data collection tools included a questionnaire responded by parents, a centrifuge, and a microscope. Content validity was used to validate the questionnaire and the other tools were calibrated by certified medical engineers. Sample of feces were collected over 3 days. Slide were observed by 3.2 and 10 lenses and feces samples were observed three times by directed method and formalin ether. Test results were documented in the related forms of each child. Data were then analyzed by SPSS software.

Results: