[Bovicystan treatment of subclinical ketosis in cows]. / Lekuvane na subklinichnata ketoza pri kravi s bovitsistan.

Experiments with normal animals (10 sheep and 15 cows) revealed that the intravenous injection of bovicystan led to a considerable and dependable rise of the blood sugar for 2 to 36 hours the peak being at the 6th hour. The treatment of 95 freshly calved cows on 8 farms with signs of subclinical ketosis (ketonemia 22.4 +/- 1.9 mg%, ketonuria up to dilution of 1:2-1:16 and hypoglycemia 26.7 +/- 2.6 mg%) resulted in a 92.6 per cent total curative effect, consisting in the full inhibition of ketonuria, drop of the ketone bodies in the blood up to 16.5 +/- 1.2 mg%, on an average, and rise of the blood sugar up to 47.7 +/- 1.2 mg%, on an average. In 27.4 per cent of the treated cows ketonuria disappeared after the first injection, in 50.5 per cent - after the second one, and in 14.7 per cent only did ketonuria faded after the third injection of the preparation within a period of 24 hours. At the 48th hour following the last introduction of bovicystan there was an increase in the blood serum level of carotene and lactose, and a decrease in the level of inorganic phosphorus. One to three weeks after treatment with bovicystan in some 27.6 to 33.0 per cent of the cows on 2 of the farms signs of subclinical ketosis reappeared.

[Comprehensive method for the prevention of mastitis in cows]. / Kompleksen metod za profilaktika na mastitite pri kravite.

Trials have been carried out in the course of two years to reduce the cases of clinical and subclinical mastitis and the losses thereof in the industrial raising of cows. As a result of mastitis control measures the outbreaks of the disease were decreased: by 58.8 per cent, and by the end of the second year--by 66.2 per cent (subclinical mastitis) and by 33.0, resp. 28.6 per cent (clinical mastitis). This went along with the increase in the milk yield--by 120 1 per cow in the first year, and 70 1--in the second year.