EN
Material. Thirty eight fecal samples of Eurasian Lynx (Lynx lynx L.) collected in Białowieża Primeval Forest (E Poland) in years 2001-2004 were analysed. Results. The presence of Aelurostrongylus abstrusus (L1) larvae was evidenced by use of decantation and flotation methods. The general prevalence of the infection recorded during the study was 21.1%, whereas mean intensity was 11,5 (1-33 larvae per sample). To our knowledge, this is the first case of Aelurostrongylus abstrusus recorded in Euroasian lynx from Poland.