Three to five presumptive Listeria colonies were sub-cultured onto Tryptic Soy agar (Oxoid, Basingstoke, UK) with 0.6% yeast extract (Oxoid, Basingstoke, UK) (TSAYE) and were then incubated for 24 h at 37 C.
Three to fivepresumptive Listeria colonies were sub-cultured onto Tryptic Soyagar (Oxoid, Basingstoke, UK) with 0.6% yeast extract (Oxoid,Basingstoke, UK) (TSAYE) and were then incubated for 24 h at 37 C.