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Polymorphonuclear leucocyte function: relationship between induced migration into the bovine mammary gland and in vitro cell activity



Polymorphonuclear leucocyte function: relationship between induced migration into the bovine mammary gland and in vitro cell activity



Veterinary Immunology and Immunopathology 23(1/2): 75-83



Low doses of 10-7 mg Escherichia coli endotoxin applied as intramammary infusion into single bovine quarters induced a rise in milk cell count without other inflammaory signs. Significantly fewer quarters responded in early lactation than in mid lactation. Maximum cell count was also somewhat later and less pronounced in early lactation. The rise in milk cell count after infusion of E. coli endotoxin was related to in vitro chemotactic activity of blood polymorphonuclear leucocytes (PMN). PMN isolated from cows which did not respond with a rise in milk cell count upon endotoxin infusion showed a diminished chemotactic activity in vitro as compared to PMN isolated from animals which did respond to an intramammary endotoxin infusion with a rise in milk cell count. No differences in phagocytic and metabolic activity were observed in vitro between the PMN isolated from the two groups of animals.

Accession: 001912918

Download citation: RISBibTeXText

PMID: 2559539

DOI: 10.1016/0165-2427(89)90111-6

Download PDF Full Text: Polymorphonuclear leucocyte function: relationship between induced migration into the bovine mammary gland and in vitro cell activity



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