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  • Επιστημονικές Δημοσιεύσεις Μελών ΠΘ (ΕΔΠΘ)
  • Δημοσιεύσεις σε περιοδικά, συνέδρια, κεφάλαια βιβλίων κλπ.
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Effects of experimental challenge of ewes with Mannheimia haemolytica on subsequent milk composition

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Author
Fragkou, I. A.; Solomakos, N.; Dagleish, M. P.; Cripps, P. J.; Papaioannou, N.; Boscos, C. M.; Ververidis, H. N.; Billinis, C.; Orfanou, D. C.; Govaris, A.; Kyriazakis, I.; Fthenakis, G. C.
Date
2008
DOI
10.1017/s0022029908003440
Keyword
mastitis
sheep
teat
Mannheimia haemolytica
INDUCED SUBCLINICAL MASTITIS
PASTEURELLA-HAEMOLYTICA
STAPHYLOCOCCUS-AUREUS
BACTERIAL-FLORA
TEAT DUCT
SHEEP
UDDER
INOCULATION
INFECTION
DIAGNOSIS
Agriculture, Dairy & Animal Science
Food Science & Technology
Metadata display
Abstract
The objective was to describe the physicochemical changes during the early phase of subclinical mastitis and to associate them with pathological findings. A Mannheimia haemolytica strain was deposited into one teat duct of 25 ewes and the clinical, bacteriological, cytological, physicochemical (pH, milk composition), gross-pathological and histological findings were subsequently recorded. The organism was consistently isolated from samples of teat duct material (140/150) but not from mammary secretion (50/150). California Mastitis Test (CMT) scores increased (> 1) and remained high (143/150 samples) after challenge; polymorphonuclear neutrophils (PMN) predominated in milk films, but the proportion of lymphocytes and macrophages progressively increased. Increased pH values (> 7.0) were recorded in the mammary secretion from the challenged side. Furthermore, content of fat, total proteins and lactose therein decreased markedly. Histological changes (leucocytic infiltration, destruction of epithelial cells) were observed in the mammary parenchyma of the ewes. The present results confirm that the reduction of milk constituents is the effect of cellular damage and can occur soon after infection.
URI
http://hdl.handle.net/11615/27571
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  • Δημοσιεύσεις σε περιοδικά, συνέδρια, κεφάλαια βιβλίων κλπ. [9728]
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Η δικτυακή πύλη της Ευρωπαϊκής Ένωσης
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