was added. The incubation was carried out at 37 C for 72 h
(Dave and Shah, 1996). Total coliform was counted on Mac-
Conky Agar (DM141D, UK) with a double layer of the same
medium incubated at 37 C. S. enteritidis strain PT4 was
counted on Xylose Lysine Deoxycholate agar (XLD) agar
(Merck, 1.05287) after incubation for 24 h at 37 C. S. aureus
was counted on Baired Parker agar (Biolife, 401116)