A 1 ml
portion of the pre-enrichment was added to 10 ml Rappaport–
Vassiliadis (RV) broth and incubated for 24 h at 42 °C. Samples from
RV enrichment broth were plated on Xylose-lysine-desoxycholate
agar, Salmonella–Shigella agar, Brilliant Green agar, Bismuth Sulfite
agar and MacConkey agar plates.