Epidemiologic Survey of Intestinal Parasites in School Children of Shahriar in 1993

To determine the prevalence of intestinal parasites in school children of Shariar, 1902 students (58 % male, 42 % female) were randomly selected from 22 schools in rural and urban regions of Shahriar. After filling out a questionnaire from the selected students, fresh stool samples were examined for the presence of intestinal parasites and determining this tynos. The age of study population was between 6 and 15 years (mean age 9.3 ys). The rate of parasitic infection among girls and boys were 6 % and 64 % , respectively (P<0.005). The prevalences of pathogenic protozoa including Giardia and Entamoeba histolytica were 26 % (22 % in urban areas 28 .4 % in rural areas) and 6.7% (5.6% in urban areas, 28.4% in rural areas), respectively. The prevalences of non pathogenic protozoa were as follows; E. Coli 27. 8 % , iodamoeba butschlii 12.1 % endolimaz nana 7. 8 % chilomastix mesnili 6.5%, Dientamoeba frogilis 4.9% and trichomonas hominis 2 % . The prevalence of helminis were as follows. Enterobius vermicularis 3 % ( I. 8 % in urban areas, 3 . 5 % in rural areas). Ascaris 2. 5 % (2 % in urban and 2.5 % in rural regions)°, tricbocephalous 1 % ( 1. 2 % in urban regions and 8 % in rural regions). Dicrocoeloum 3 % , taenicand hoole worms 2 % , Trichostrongylus and Fasciola 1. % In this survey high prevalencs of Giardia (pathogenic protozoa) and E. Coli ( a non pathogenic protozoa) are remarkable.