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  • Title: Heterogeneity in phagocytic and nitroblue tetrazolium reductive properties of neutrophils from cows.
    Author: Kabbur MB, Jain NC, Zinkl JG, Farver TB.
    Journal: Am J Vet Res; 1991 Dec; 52(12):2023-8. PubMed ID: 1789516.
    Abstract:
    Phagocytic and nitroblue tetrazolium (NBT) reductive activities of blood neutrophils from 19 Holstein heifers were measured by light microscopic and spectrophotometric methods, respectively. These functional properties of neutrophils correlated well (r = 0.64) and varied significantly (P less than 0.05) among animals studied. Variations in phagocytosis and NBT reductive activities attributable to the source of sera were determined in experiments in which cells from the same cows and zymogen particles opsonized with heat-inactivated autologous or homologous sera were used. Variations attributable to the source of cells were determined in experiments in which cells from different cows and particles opsonized with pooled sera from all the cows were used. Most of the variation in phagocytic properties and NBT reductive activities was attributable to the source of cells (ie, each cow). The source of sera contributed slightly to the variation in NBT reductive activities, but not to the phagocytic properties. These results support the concept of functional heterogeneity of neutrophils among cows.
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