Failure of Staphylococcus aureus to Acquire Direct and Cross Tolerance after Habituation to Cinnamon Essential Oil

Failure of Staphylococcus aureus to Acquire Direct and Cross Tolerance after Habituation to Cinnamon Essential Oil

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Utilization of sublethal concentrations of cinnamon essential oil (CEO) for food preservation eagles head coach hoodie has been proposed.However, exposure to stressful, sublethal growth conditions may induce bacterial tolerance to homologous or heterologous stressing agents.Hence, the ability of CEO to stimulate bacterial stress response was evaluated in the current work.

Staphylococcus aureus was exposed to 1/4 and 1/2 of the minimum inhibitory concentration (MIC, 500 μL/L) of CEO for 18 h.It bar drain board was found that overnight habituation to CEO failed to induce direct tolerance and cross-tolerance to lactic acid (pH 4.5), NaCl (10 g/100 mL) and high temperature (45 °C) in S.

aureus.Likewise, S.aureus cells subjected to successive habituation with increasing amounts (1/16 MIC to 2× MIC) of CEO developed no direct tolerance.

Taken together, CEO has no inductive effect on the acquisition of stress tolerance in S.aureus.