مطالعه وضعیت آلودگی به انگلهای روده ای در دانش آموزان ابتدائی و راهنمائی روستاهای بخش مرکزی شهرستان همدان

          A cross sectional study was carried out in order to assess the parasitic    infections of school children in rural areas of Hamadan.           A total of 906 school children , 6 to 15 years old , from 9 villages in    Hamadan were selected randomly for parasite examination. Parasitological    examination of stool and eggs count were carried out by formalin – ether    concentration and modified stoll’s technique , respectively.             The results showed that total prevalence of intestinal parasites were    86%. The highest prevalence of helminthic infections and pathogenic    protozoa were Ascaris Lumbricoides (39.6%) and Giardia Lamblia     (20.5%). Distribution of parasites according to sex was not significantly    different. Mean ± S.D of intensity of Ascaris Lumbricoides was 17235±22008    with maximum 163000 eggs per gram faeces. Mean±S.D of intensity of    Trichuris Trichiura was 1227±3173 with the maximum 25000 eggs per gram    faeces. Mean ± S.D of intensity of Hymenolepis Nana was 4320±7160. The    mean intensity was higher in male than female.