EN
The objective of this study was to evaluate the influence of subclinical and clinical primary ketosis in cows on liver functioning, as well as the selection of optimal biochemical parameters set, useful in early diagnostic and evaluation of intensification of liver’s functional disorders accompanying this disease in cows. Blood samples from 121 cows in early lactation were taken, ketone bodies, free fatty acids (FFA), glucose, total bilirubine (TB), total bile acids (TBA), total protein (TP), albumine, serum triglyceride (TG) and cholesterol concentrations were evaluated as well as the FFA/TG and FFA/cholesterol ratio was estimated. The cows were divided into 3 groups: control group (n = 30), subclinical group (n = 32) and clinical ketosis group (n = 59) on the basis of the expression of clinical signs and level of ketonaemia in the blood. FFA/TG ratio, TB and TG seem to be the most reliable diagnostic liver function parameters in cows with primary ketosis.