[Enterobiosis in kindergarden and school children from selected institutions from Olsztyn and surroundings].

The studies were conducted during the school year of 1996/1997 among the children at the age of 5, 6 and 7 years old from Olsztyn and nearby municipality of Purda. In total, 151 children were examined by Graham's method. The presence of eggs of the parasite was confirmed in 13.3% of the total examined population. The infestation was lower in Olsztyn (12.0%) and the lowest in Purda (9.4%) but in the former state-owned Farm village Prajłowo it reached 27.8%. In general, the pinworms were found more frequently in 7 year old children (23.33%) than in case of the others (8.69% and 7.14% for 5 and 6 year old children respectively). In the study, younger boys were more frequently infested than the girls.