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Representative image (a) and diameter (b) of motility halo of E. coli O157:H7, nonadapted (control) or adapted to sublethal thymol (1/2T), carvacrol (1/2 C), or trans-cinnamaldehyde (1/2TC), in swim agar without (recovery media) or with a sublethal level of EO (continuous stress media). Different capital letters (A to C) represent statistically significant (P < 0.05) differences between control and EO-adapted cells.
