The effects of an oral supplement containing calcium and live yeast on circulating calcium and production following IV lipopolysaccharide infusion in dairy cows

摘要

Administrating lipopolysaccharide (LPS) decreases circulating calcium (Ca) and markedly reduces both feed intake and milk yield in lactating cows. Calcium is involved in immune system activation, but whether supplemental Ca benefits immune-challengedcows remains unclear. Therefore, study objectives were to evaluate if providing an oral supplement containing soluble Ca, live yeast and other micronutrients would ameliorate LPS-induced hypocalcemia and production parameters in lactating dairy cows.