Antimicrobial activity of oleanolic acid on Listeria monocytogenes under sublethal stresses of NaCl and pH

The objective of this study was to evaluate the inhibition of Listeria monocytogenes growth by oleanolic acid under sub-lethal stresses of NaCl and pH. L. monocytogenes ATCC15313 (6 log CFU/mL) was inoculated in microplate wells contain-ing brain heart infusion (BHI) broth supplemented with oleanolic acid in various amounts (0, 0.25, 0.5, 1.0, 1.5, 2.0, and 4.0 µg/mL), and different pHs (5 and 7) and NaCl concentrations (0, 3, and 6%), followed by incubation under accelerated stor