Ekstensywność inwazji Fasciola hepatica L. w okresie powojennym oraz ocena niektórych strat wywoływanych choroba motylicza u bydła w Polsce w latach 1995-1997

On the background of informations about frequency of appearance Fasciola hepatica L. among cattle in Poland im the time from 1995-1997, as well es in the former period, there is presented in the article an estimative apperiation of economical losses caused by staggers disease among cattle. The highest extensiveness of invasion of F. hepatica L. among cattle was noticed in the fifties and sixties manty in the north-eastern Poland. Losses caused by confiscation of a liver to amounted to 1197031zł in 1995, 1277154zł in 1996 and 1312078zł in 1997.