EN
The authors performed 2034 oesophagus dissections in cattle, 2630 dissections in swine and 756 sheep gullet dissections for the presence of Gongylonema pulchrum Molin 1857 in the period from March to the end of December, in the year 1963. As a result of their investigations the authors conclude that G. pulchrum has a frequency of 4.5% in cattle of the Lublin voivodeship, its invasion intensity ranging from 1 to 12 parasites. In sheep the frequency amounts to 1.6%, the invasion intensity being from 1 to 7, per oesophagus. This parasite was never found in swine. In cattle and sheep the parasite was most ofter found in proximal and distal ends of the gullet. No seasonal differences were found as to the extensivity and intensity of this parasite. Clear -cut cases with sings of disease were not found.