All strains were tested in triplicates for antimicrobial activity against two Escherichia coli strains (ATCC 35150 and NCTC 12079), two Salmonella Enteritidis strains (ATCC 13076 and WT) and two Listeria monocytogenes strains (FMCC B218 and NCTC 10527). Fresh overnight bacterial MRS culture supernatants of the potential probiotic strains were collected by centrifugation (10,000 × g, 15 min, 4 °C), adjusted to pH 6.5 and filter-sterilised (0.22 μm). The cell-free culture supernatants (CFCS) of the potential probiotic strains were screened for inhibitory activity using the well diffusion assay.