EN
The aim of the study was to determine the influence of disturbed lipid metabolism in dairy cows on the functional condition of the liver. The laboratory investigations have been performed on 48 black-white breed cows divided into four groups: 4 and 2 weeks before parturitation and 1-2 and 5 weeks after delivery. In spite of the markers of fat metabolism (NEFA, TG and total cholesterol), it has been possible to determine the activity of GGTP, LDH and AspAT. The results indicate an impairment in the liver function during disturbed lipid metabolism in cows. The changes had a subclinical character and were more pronounced after parturitation. The activity of hepatic enzymes, particularly GGTP, in useful for diagnosis of subclinical disturbances of liver functions in the course of lipid metabolism disturbances. The enzyme activity should be analysed together with fat metabolism markers mainly with a concentration of NEFA.