for 2 min and then serially dilutedwith sterile
peptone water. Enumeration of S. Typhimurium, E. coli O157:H7 and
S. aureus cells were determined by spread plating 0.1 ml of diluted
samples onto selective media. Xylose Lysine Deoxycholate (XLD) agar
was used for enumeration of Salmonella; Sorbitol MacConkey (SMAC)
agar was used for enumeration of E. coli O157:H7, and Baird-Parker
agar + egg yolk tellurite (BP) agar was used for enumeration of
S. aureus. Following inoculation, plates were incubated under aerobic
conditions at 37 °C for 24 h.