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Ability of the adapted strains to adhere to and invade the INT-407 cell line. (a) 4/74, (b) DTU3, wild type (black bar), control (dotted bar) and adapted strain (grey bar). Bars represent CFU in inoculum, of adhered bacteria and invaded bacteria. Error bars represent one standard deviation. Asterisk indicate level of significant difference from wild type: *p ≤ 0,05, **p ≤ 0,01, ***p ≤ 0,001
