The effect of nisin and garlic (Allium sativum L.) essential oil separately and in combination on the growth of Listeria monocytogenes

► We examine effect of the nisin and garlic essential oil on Listeria monocytogenes. ► The combined activity was studied by Differences in Population (DP) method. ► Essential oil and nisin possessed considerable anti-listerial properties. ► The DP was related strongly to the agent's concentration and media pH.