Nicienie trawieńca i płuc występujące u jeleni w Nadleśnictwie Strzałowo (Puszcza Piska)

The examination of 18 abomasums and 23 excrement samples of red deer from the Strzałowo Forest District (Pisz Primeval Forest) showed infestation of these animals with 6 gastric−intestinal nematode species (Spiculopteragia boehmi, Ostertagia leptospicularis, Ostertagia kolchida, Spiculopteragia mathevossiani, Trichostrongylus axei and Nematodirus roscidus) and 3 pulmonary nematode species (Elaphostrongylus cervi, Varestrongylus sagittatus and Dictyocaulus eckerti). As a result of performed disinfestation, the average infestation level of the animals with S. boehmi nematodes and female nematodes from the family Ostertagiinae was reduced and the infestation with D. eckerti was eliminated.