Xylose lysine deoxycholate agar (Oxoid, UK) for SE and the Salmonella Chromogenic Agar Base with Salmonella Selective Supplement SR0194 (Oxoid, UK) for SG were inoculated with 100 μL of each 10-fold serially diluted sample. Agars were incubated for 24±2 h at 37℃.