Figure 3From: Listeria monocytogenes virulence factor Listeriolysin O favors bacterial growth in co-culture with the ciliate Tetrahymena pyriformis, causes protozoan encystment and promotes bacterial survival inside cystsThe effect of various L. monocytogenes strains on the T. pyriformis population. T. pyriformis trophozoite (while columns) and cyst (black columns) concentrations are shown on day 7 of co-cultivation with various L. monocytogenes strains designated on the figure, or without bacteria (w/o bacteria). The mean values ± SE from two experiments made in triplicate are shown.* p < 0,05; **p < 0,005.Back to article page