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.