EN
Postmortem examination of 13 Cervus nippon L. acclimatized in Poland were conducted and in all of the examined animals he found parasitic worms. In spite of 100% of extensity of invasion, the intensity of the helminthiasis was always unvsually low (table 2). Analizing the causes which could exert influence on the low intensity of invasion, the author supposes that it is conditioned by the specificity of food ingestion by Cervus nippon L. Summarizing, the author states that the helminthofauna of the Cervus nippon L. acclimatized in Poland is characterized by: 1) the poor species composition which includes barely 12 specics, 2) the lack of occurrence of species specific to Cervus nippon L., 3) the different species composition of which 50% (6 species) are new species to the Cervus nippon L.