The effects of an oral supplement containing calcium and live yeast on circulating calcium and production following IV lipopolysaccharide infusion in dairy cows
Keywords:lipopolysaccharide, calcium, milk yield, feed intake, immune system, oral supplement, dairy cattle
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-challenged cows 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.