Abstract: Stool specimens of 21102 persons from 11 counties were examined by iodine staining method, modified Kato-Katz thick smear method and nematode larva culture method. Among the people examined 15141 were positive, the infection rate being 71.8%, of which multiple infection accounted for 61.5%. A large proportion of infected population were of low and moderate intensity. During the investigation, 18 species of human parasites were identified. The importance of control of parasitic diseases is stressed.