Modification of ST invasion by <i>S.b</i>-B, beads or <i>S.b</i>-B-CM.

T84 cells were infected 60 min with the wild type strain SL 1344 alone or in the presence of S.b-B, beads or the conditioned medium by the yeast (S.b-B-CM) added during the infection. Experiments were also performed in cell incubated overnight (ON) with S.b–B (S.b-B(ON)) prior infection. At least beads and S.b-B-CM were added together during infection with ST. Invasion was assessed by the gentamicin protection method (23). % of invasion was calculated as intracellular bacteria/CFU of ST added by well (107 CFU/well). * Indicates statistical difference vs ST-alone infected cells (P<0.05) (n = 4). #Indicates statistical difference vs beads+SL1344 infected cells or S.b-B-CM+SL1344 (P<0.05) (n = 3).