Detection of Some Virulence Factors in Staphylococci Isolated from Mastitic Cows and Ewes

Abstract About 150 million families around the world are engaged in milk production. However, inflammation of mammary gland (mastitis) remains a major problem dairy ruminants that affects quality worldwide. The aim this study was examination udder health with detection contagious and environmental pathogens causing mastitis 960 940 cows ewes, respectively. presence selected virulence factors such as: formation haemolysis, gelatinase, biofilm, hydrolyse DNA, resistance to antibiotics methicillin gene ( mecA ), were determined associated isolated staphylococci. These staphylococci can have untoward effects on severity mastitis. results our indicated that, addition S. aureus, uberis, agalactiae ) mastitis, non-aureus (NAS), is risk ewes. NAS, as chromogenes , warneri xylosus from infected animals clinical chronic had highest representation comparison less virulent strains. In addition, isolates aureus NAS demonstrated 77.0 % 44.2 one or more antimicrobial classes mastitic samples obtained Due high β-lactamantibiotics two species cows’ samples, methicillin-resistant poses serious complications for treatment consumers.