From March to November 2004 a total of 634 stool samples from the children coming to the
hospitals, cure centers and randomly from the children of kindergarten and primary schools. General
stool examination and precipitation methods were performed on each specimen, the infection rate of
Hymenolpes nana 1.8% among children for both Gender(male and female) for different ages that had
been recorded the highest rate for (4- 6)year is 2.94% and the lowest rate for (9-12)year is 1.4%.
Seasonal variation were discussed, that August was recorded the highest rate 5.8%.