Interaction between the Concentration of β-Hydroxybutyric Acid and the Content of Long-Chain Fatty Acids in the Early Stage of Lactation––Comparing Multiparous and Primiparous Cows

The aim of the experiment was to study relationship between age cows, blood BHBA content, and CLA isomer (C18:2 cis9,trans11, CLA9; C18:2 trans10,cis12, CLA10) content during first three weeks post-partum. For experiment, 105 cows were selected from entire herd assigned one four groups: healthy primiparous (PH), multiparous (MH) or ketotic (PK), (MK) based on their symptoms, serum concentrations at 5 ± 2 days Milk samples taken animals for a period weekly intervals same day. High levels ketone bodies inhibit activity acetyl-CoA, thus decreasing transport which may result in decrease CLA9 CLA10 synthesis. Studies have shown that an additional factor determining formation early stage lactation. milk PH week lactation 32.75% higher than PK milk, while MH it 67.7% MK milk. PH, when compared groups, 319% lower cows. In summary, different reference limits should be considered diagnosis ketosis, taking into account, among other things, parity.