Wystepowanie motylicy watrobowej u zwierzyny plowej i bydla w wojewodztwie olsztynskim w latach 1980-1987

In the period of 8 years (1980—1987) the extensiveness of Liver-fluke invasion was on an average: cattle — 10.9%, elk — 6.39%, stag — 1.28%, roe-deer — 0.41%. In the roe-deer, elk and cattle Liver-fluke was found in all the years of the studies; however, in elk the disease was not found in 1980, 1981 and 1984. From 1984 to 1987 there was observed an increase of the invasion but in cattle only in 1982. In turn, the invasion decreased to 7.8%; however its high level due to E.i. was observed in 1981 and 1982.