Changes in blood values of glucose, insulin and inorganic phosphorus in healthy and ketotic dairy cows after intravenous infusion of propionate solution
2007
Djokovic, R.,University of Kragujevac (Serbia and Montenegro). Dept. of Animal Science | Samanc, H.,University of Belgrade (Serbia and Montenegro). Dept. of Diseases of Ruminants and Pigs | Nikolic, Z.,University of Belgrade (Serbia and Montenegro). Dept. of Diseases of Ruminants and Pigs | Boskovic Bogosavljevic, S.,University of Kragujevac (Serbia and Montenegro). Dept. of Animal Science
The aim of the present study was to determine the degree of blood glucose utilization by peripheral tissue on the basis of changes in blood concentrations of glucose, insulin and inorganic phosphorus in 10 healthy and in 10 ketotic cows after intravenous infusion of propionate solution. Blood samples were taken at the following time intervals: just before (time 0), 8, 30, 60, 120, 180, 240 and 480 min after the intravenous infusion of 1.84 mol/L solution of propionate in the amount of 1 mL/kg of body weight. Glucose and insulin blood serum values in both groups of cows increased significantly within 120 min of the experiment. Ketotic cows showed significantly lower values of glucose within 30, 60, 120 and 240 min and of insulin within 240 and 480 min of the test. These results indicates that the ability of pancreas to release insulin was reduced in cows suffering from ketosis. The values of inorganic P in the blood were reduced in both groups of cows after 8, 30, 60, 120, 240 and 480 min of the test. Within 480 min of the test there was a significant decrease of P concentrations in ketotic cows in comparison with healthy ones. It can be concluded that there is a higher degree of blood glucose utilization by peripheral tissues in ketotic than in healthy cows.
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