Intestinal parasitosis is a major public health problem of developing countries, children being major victims. This study aimed at frequency of intestinal parasitic infections and associated factors among primary school children in Abyek township of Qazvin province (2011 -2012) This descriptive cross-sectional study on the 810 cases of primary school children was performed. Fecal samples from the students were examined by direct smear and formal-ether concentration and carbol kaynion fuchsin staining techniques also result was correlated with their socioeconomic status and hygienic behavior. The chi-square test was used for analytical assessment. The frequency rate of protozoa in boys and girls were17.6% and%17/2 respectively.Altogether7 species of protozoan parasites were detected. Of them Blastocystis hominis was most common followed by Giardia lamblia, Entamoeba coli and Endolimax nana, Chilomastix mesenili, Iodamoeba butschlii and unknown 4 nuclei cyst. The highest positive rate was found among children of 6-7years and least among those10-11years (P>0.05). Those from family size 4 and less than 4 were least infected. Children of illiterate parents were more infected than literate ones (P>0.05). In this study coccidian and helminthes parasites were not found. The Results show that infection with intestinal parasites does not statistically significant according to sex and age. Intestinal parasitic infection was found among 17.4% school children. Awareness on infectious diseases, improving hygiene, and application of supportive programs for parents to elevate socioeconomic conditions may reduce the burden of infection.
