Effects of vitamin E on mammary and blood leukocyte function, with emphasis on chemotaxis, in periparturient dairy cows.


OBJECTIVE To determine the effect of vitamin E supplementation on the immune system of dairy cows. DESIGN The following immune parameters were followed: production of chemotactic factors and superoxide by mammary macrophages and chemotactic responsiveness of blood neutrophils. ANIMALS 16 healthy Holstein dairy cows. PROCEDURE Dairy cows were assigned… (More)