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Transient hyperinvasion of HEp-2 cells (1 h) for DT104 exposed to RPz. Open bars represent bacteria isolated from RPz, i.e., the first invasion assay. Black bars represent the second invasion assay, i.e., bacteria recovered from the first assay. Gray bars represent the third invasion assay, i.e., bacteria recovered from the second assay. Percent invasion equals 100(CFU recovered/CFU added).
