Prevalence of Staphylococcus aureus in raw milks of Qom

Subject Areas : biology

Received: 2013-02-26 Accepted : 2012-05-29 Published : 2012-09-22

Keywords: Staphylococcus aureus, Mastitis, raw milk,

Abstract :

Milk is considered a nutritious food because it contains several important nutrients including proteinsand vitamins. Conversely, it can be a vehicle for several pathogenic bacteria such as Staphylococcusaureus. In this study, 123 milk samples of 123 cows from four farms of different geographic locations inQom were collected from March until November 2011. The samples were cultured on Blood agar andbacteria were identified by standard methods. On the basis of cultural and biochemical properties, 26Staphylococcus aureus isolates obtained from 123 milk samples. Among a 26 isolates, 9 isolates (7.31%)were positive coagulase and 12 isolates (9.75%) were positive DNAase.Milk is considered a nutritious food because it contains several important nutrients including proteinsand vitamins. Conversely, it can be a vehicle for several pathogenic bacteria such as Staphylococcusaureus. In this study, 123 milk samples of 123 cows from four farms of different geographic locations inQom were collected from March until November 2011. The samples were cultured on Blood agar andbacteria were identified by standard methods. On the basis of cultural and biochemical properties, 26Staphylococcus aureus isolates obtained from 123 milk samples. Among a 26 isolates, 9 isolates (7.31%)were positive coagulase and 12 isolates (9.75%) were positive DNAase.