Possible involvement of selenium in Staphylococcus aureus inhibition in cow's whey.

Previous investigations have shown that selenium supplementation inhibits growth of mastitis pathogens in cow's milk. The present study was performed to clarify the role of selenium in defence mechanisms of mammary gland. We have examined the effects of selenium supplementation on Staphylococcus aureus growth inhibiting activity in whey.

Effects of oral selenium supplementation on mastitis markers and pathogens in Estonian cows.

The effects of selenium supplementation on mastitis parameters in milk and on glutathione peroxidase (GPx) levels in blood were evaluated. Fifty-five Estonian dairy cows were allocated to selenium-supplemented (n=39) and nonsupplemented (n=16) groups. The supplemented group received 0.

Disposition of enrofloxacin (Baytril) into the udder after intravenous and intra-arterial injections into dairy cows.

Enrofloxacin (Baytril) was injected into arteries supplying the udder of dairy cows. The idea was to avoid primary distribution, metabolism and elimination and thus to deliver the drug to the target organ at higher concentration. Enrofloxacin injected into the abdominal aorta or the external iliac artery resulted in high initial enrofloxacin retention by the udder and high milk concentrations.

Comparisons of selenite and selenium yeast feed supplements on Se-incorporation, mastitis and leucocyte function in Se-deficient dairy cows.

The dairy cows at the Estonian Agricultural University appeared to have an extremely low selenium status. The selenium level was 5.6 micrograms/l in whole blood and 3.