Virulence factors and ability of staphylococci from bovine milk and the cowshed environmentto biofilm formation

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Title Virulence factors and ability of staphylococci from bovine milk and the cowshed environmentto biofilm formation
Autor: Kot, Barbara; Binek, Tomasz; Piechota, Małgorzata; Zdunek, Ewa; Płatkowska, Kamila; Wolska, Katarzyna Marzena
URI: http://hdl.handle.net/11331/3564
https://doi.org/10.2478/pjvs-2013-0091
Date: 2013
Źródło: Polish Journal of Veterinary Sciences. Vol. 16, No. 4 (2013), p. 639-645
Abstract: The aim of this study was to examine virulence factors and the ability ofS. aureusand CNSspecies isolated from milk of cows with mastitis to form biofilm, and to compare them with virulencefactors of staphylococci from milk of cows without mastitis and cowshed environment. Most ofS.aureusstrains from cows with mastitis showed haemolytic activity (93.9%), among them 72.7% and21.2% producedα- andβ-haemolysin, respectively.S. aureusfrom cows with mastitis symptomsproduced proteases (above 48%) and esterase (42.4%). The highly significant relationship betweenthe number ofS. xylosusstrains producing haemolysins (62%) and the origin of these strains frommilk of cows with mastitis was observed. The ability to produce proteases was significantly associatedwithS. sciurifrom milk of cows with mastitis. The ability of biofilm formation by staphylococcalstrains from milk of cows with mastitis was greater than in strains from milk of cows without mastitisand the difference was significant (p≤0.05). The highest percentage of strains from milk of cows withmastitis were weak biofilm formers (48.6%), while 40% and 11.4% of strains were moderate andstrong biofilm producers, respectively.S. xylosusshowed the highest ability to form biofilm, while thelowest ability to form biofilm was observed inS. aureusandS. epidermidis.In conclusion, production of exotoxins and enzymes, and ability of biofilm formation shown bymany CNS isolated from milk of cows with mastitis symptoms indicates that these features areimportant in pathogenesis of this disease.

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