Internal parasites of cattle in select Western Pomerania farms. The studies were carried out in five farms, on 84 calves and 153 cows. The prevalence and intensity of the Coccidia and gastro-intestinal nematodes infection were determined by means of the Willis-Schlaafs and McMaster's methods. The Coccidia composition in the examined animals was determined by morphological features of the oocysts and the sporulation time. The following four Eimeria species were isolated: E. bovis, E. aubernensis, E. zürni and E. ellipsoidalis. Two methods were used for detection of Cryptosporidium sp. - the Ziehl-Neelsen staining technique and coproantigen test. In cows, the overall prevalence was Eimeria sp. ranged from 5.5 to 23.4%, gastro-intestinal nematodes ranged from 12.7 to 42.6%. In calves, the overall prevalence Eimeria sp. was ranged from 10.0 to 36.8% oocysts and Cryptosporidium sp. 22.8%.