Folia Microbiologica

, Volume 43, Issue 2, pp 151–155 | Cite as

Inhibition ofListeria monocytogenes by plantaricin NA, an antibacterial substance fromLactobacillus plantarum

  • N. A. Olasupo


ALactobacillus plantarum of vegetable origin produced a bacteriocin inhibitory toListeria monocytogenes. The antimicrobial agent was inactivated by proteolytic enzymes, was resistant to heat (100°C for 30 min) and stable over a wide pH range (pH 2–10), and displayed a bactericidal mode of action. Growth inhibition ofL. monocytogenes depend on bacteriocin concentration. The antilisterial efficiency depended on the strain ofL. monocytogenes used but was not influenced by the growth phase of this strain. A decrease in absorbance overtime, indicative of cell lysis, was also observed. The significance of the results is discussed in relation to the potential of the bacteriocin in controllingListeria-associated food-borne hazards in foods.


Lactobacillus Lactic Acid Bacterium Listeria Monocytogenes Fermented Food Bacteriocin Activity 


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© Folia Microbiologica 1998

Authors and Affiliations

  • N. A. Olasupo
    • 1
  1. 1.Department of Botany and MicrobiologyLagos State University, OjoLagosNigeria

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