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Mammary defences and immunity against mastitis in sheep
Authors
Politis A.P., Mavrogianni V.S., Barbagianni M.S., Vasileiou N.G.C., Fthenakis G.C., Fragkou I.A. Katsafadou A.I.
Publication date
1 January 2019
Publisher
'MDPI AG'
Doi
Cite
Abstract
The objectives of this review paper are to present udder defences, including teat of the udder, mammary epithelial cells, leucocytes, immunoglobulins, complement systemand chemical antibacterial agents, to describe cooperation and interactions between them and to elaborate on potentials regarding their significance inmammary immunisation strategies. The teat of the udder provides initial protection to the mammary gland. The mammary epithelial cells synthesise antibacterial proteins and the leucocytes produce various inflammation mediators (cytokines or chemokines), phagocytose bacteria and recognise antigenic structures. In themammary gland, four immunoglobulins (IgG1, IgG2, IgMand IgA) have important roles against bacterial pathogens. The complement systemis a collection of proteins, participating in the inflammatory process through various pathways. Other components contributing to humoral mammary defence include lactoferrin, lysozyme and the lactoperoxidase/myeloperoxidase systems, as well as oligosaccharides, gangliosides, reactive oxygen species, acute phase proteins (e.g., haptoglobin and serum amyloid A), ribonucleases and a wide range of antimicrobial peptides. Management practices, genetic variations and nutrition can influence mammary defences and should be taken into account in the formulation of prevention strategies against ovine mastitis. © 2019 by the authors. Licensee MDPI, Basel, Switzerland
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Multidisciplinary Digital Publishing Institute
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oai:mdpi.com:/2076-2615/9/10/7...
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University of Thessaly Institutional Repository
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