Fig 1.

Viable counts of S. Typhimurium ATCC 14028 in meat broth to which the essential oil (at its MIC) was added following overnight exposure at 35°C to subinhibitory concentrations of O. vulgare L. essential oil (A) and carvacrol (B). ■, control (nonadapted cells); +, cells preadapted at an MIC of 2 to 0.625 μl ml⁻¹; Δ, cells preadapted at an MIC of 4 to 0.312 μl ml⁻¹.