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The 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.
