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Effects of vitamin E and selenium supplementation on in vitro phagocytosis and intracellular kill of bacteria by bovine neutrophils were investigated. Diets were not supplemented with vitamin E and selenium during the dry period and first 21 d of lactation. Cows were then assigned to one of four treatment diets for 30 d. Treatment diets were either unsupplemented or supplemented with vitamin E, selenium, or both vitamin E and selenium, in a 2 x 2 factorial arrangement. Peripheral blood neutrophils were isolated from each cow on lactation d 51. Vitamin E supplementation of diets increased intracellular kill of Staphylococcus aureus and Escherichia coli by neutrophils. Intracellular kill of S. aureus was greater in neutrophils isolated from selenium supplemented cows than in neutrophils from cows without supplemental selenium. Intracellular kill of E. coli did not differ between neutrophils from selenium supplemented and selenium unsupplemented cows. Ability of neutrophils to phagocytize either S. aureus or E. coli was independent of vitamin E and selenium.
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W P Weiss, and
D A Todhunter, and
W L Schockey
June 1977,
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J S Hogan, and
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July 2001,
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J S Hogan, and
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D A Todhunter, and
W L Schockey
February 1986,
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J S Hogan, and
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J S Hogan, and
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J S Hogan, and
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J S Hogan, and
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June 1958,
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J S Hogan, and
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J S Hogan, and
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W L Schockey
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J S Hogan, and
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D A Todhunter, and
W L Schockey
March 1988,
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