[Infection of red deer with lung nematodes in Polish and Belorussian parts of Białowieza Forest].

Fecal samples from red deer from polish and belorussian parts of Białowieza Forest were examined by Baermann method. First stage larvae of three species of lung nematodes were found. In polish part in 100% of samples were larvae of E. cervi, in 50% V. sagittatus and in 21% D. noerneri, and in belorussian the level of infection was lower and larvae were in 92%, 36% and 12% of samples respectively. In significant part of samples were met mixtured invasion of two or three species. Finding of larvae of E. cervi is the first registration of this species in belorussian part of Białowieza Forest, and V. sagittatus is a new species for the fauna of Byelorussia. Nematodes E. cervi are dangerous for domestic ruminants.