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Opsonin-dependent stimulation of bovine neutrophil oxidative metabolism by Brucella abortus

Canning, P.C.; Deyoe, B.L.; Roth, J.A.

American Journal of Veterinary Research 49(2): 160-163

1988

ISSN/ISBN: 0002-9645
PMID: 2831760
Document Number: 325795
Nonopsonized Brucella abortus and bacteria treated with fresh antiserum, heat-inactivated antiserum, or normal bovine serum were evaluated for their ability to stimulate production of superoxide anion and myeloperoxidase-mediated iodination by neutrophils from cattle. Brucella abortus opsonized with fresh antiserum or heat-inactivated antiserum stimulated production of approximately 3 nmol of O2-/10(6) neutrophils/30 min. Similarly treated bacteria also stimulated the binding of approximately 4.3 nmol of NaI/10(7) neutrophils/h to protein. Significant (P less than 0.05) production of O2- and iodination activity by neutrophils were not stimulated by nonopsonized bacteria or organisms treated with normal bovine serum. Seemingly, B abortus stimulated oxidative metabolism in bovine neutrophils; however, the stimulation was dependent on the presence of bacterial associated opsonins.

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