In vitro function of canine neutrophils during experimental inflammatory disease

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The effect of acute inflammation on neutrophil function in the dog was studied by measuring in vitro phagocytosis and killing of Staphylococcus aureus. Phagocytosis was not impaired after 30 or 60 minutes and bactericidal activity was not impaired after 60 minutes incubation. However, average bactericidal activity after 30 minutes incubation was diminished significantly (P < 0.01). Wide variations in bactericidal activity after 30 minutes incubation during the course of the inflammation did not correlate with neutrophil count, number of toxic neutrophils, or clinical course of the inflammation. These results indicate that a defect in bactericidal activity can occur in dogs with severe inflammatory disease, and that repeated assays, rather than single determinations, may be needed to detect this dysfunction. © 1983.

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Veterinary Immunology and Immunopathology

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