[Total lipids and cholesterol in the serum of clinically healthy and ketotic cows].

The total lipids and cholesterin were determined in the serum of 26 normal cows in an advanced lactvery. It was found that the rise of the total lipids in the diseased cows was negligible and was statistically significant only with regard to those that have recently calved, which showed the lowest values. No conceivable differences were established after recovery. The drop of the total cholesterin in the fresh and ketosis-affected animals was not accompanied by substantial changes in the coefficient of esterification; these variations disappeared with recovery. Anologous were the changes in the ester cholesterin the rise of which was visible after recovery although statistically insignificant. The changes observed were characteristic of the glucose deficiency present in ketosis-affected cows.