Effect of KSBT 56 on invasion of S. Enteritidis (A) and effect of CFCS of KSBT 56 on invasion of S. Enteritidis to HCT-116 cells. A. Gentamicin protection assay was performed to determine the invasion of S. Enteritidis into the HCT-116 cell line in the presence (+) or absence (−) of KSBT 56 strain. The pathogen and the KSBT 56 strain were either co-infected together into the cell line (0 h) or the pathogen was added at a time delay of (1 h). B. The effect of CFCS on invasion of S. Enteritidis was determined by co-incubating S. Enteritidis with the CFCS of KSBT 56 in 24- well tissue culture plate seeded with HCT-116 cell line. S. Enteritidis was also cultured with CFCS for 1 h before infection of HCT-116 cells. L. plantarum MTCC 1407 was taken as a reference strain. The invasion of S. Enteritidis to HCT-116 cells is taken as control.