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  • Title: Immunobiology of bovine mammary gland: apoptosis of somatic cells in milk during naturally occurring mastitis.
    Author: Cywińska A, Baś M, Karpiuk O, Krzyzowska M, Rzewuska M, Schollenberger A, Niemiałtowski M.
    Journal: Pol J Vet Sci; 2006; 9(1):63-70. PubMed ID: 16573277.
    Abstract:
    Mastitis remains a major cause of economic losses in dairy herds. It is believed, that the enhancement of natural defense mechanisms in mammary gland may be helpful in the treatment of bovine mastitis. Our study was designed to assess the apoptosis of leukocytes isolated from bovine milk during subclinical staphylococcal mastitis. Milk samples were collected from cows naturally infected with one pathogen--Staphylococcus aureus and from animals with mastitis caused by several pathogens, including S. aureus. It has been determined that the rate of apoptosis was lower in mastitic milk, as compared with control samples, although varied significantly between groups. High percentage of apoptotic cells was detected in milk with high counts of pathogenic bacteria. In all groups the rate of apoptosis was dependent on the bacterial load, although various correlations were identified. Thus, it is postulated, that the rate of apoptosis of somatic cells in mastitic milk is related to the etiology of infection and is determined by the bacterial load.
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