EN
Coproscopy parasitological studlies were carried out in family environments. Samples of feces were taken three times from 1728 persons (400 familes) from urban and rural environments in south-eastern regions of Poland. The general extensity of giardiasis amounted to 39.6% and was higher in urban families (average 41.3%) than in those inhabiting rural areas (average 36.6%). The giardiasis dominated in children from 1 to 4 years (average more than 78% infected), especially in urban areas (extensity of infection 80.1%). It was also frequent in persons of male sex.