The effect of anthelmintics on the development of A. lumbricoides eggs was observed by treating 4 groups of primary school children in North Jakarta. Each group was treated with one of the following anthelmintic i.e. pyrantel pamoate, oxantelk pyrantel pamoate, albendazole and mebendazole. Two weeks after treatment stools positive with A. lumbricoides eggs were cultured in 2 percent potassium b…