ABSTRACT
The screening survey by stool examination prior the third round showed the satisfactory results of the previous rounds of treatment in comparison to the base line survey prior the intervention, the overall prevalence of intestinal worm infection was reduced by 56.3%, of which Ascaris infection by 73.5%, Trichuris by 52.4%, hookworm by 55.1 %. The intensity of infection was also reduced significantly as Ascaris by 61.1 %, Trichuris by 52.2%, hookworm by 81.6%. Nearly all the children (99.6%) in the project schools were treated three times (totally 331,194 times of treatment) with the interval of 6 months. The knowledge, attitude and practice of the children and their parents were found to have been much improved as compared to that before the intervention