Lactobacillus sakei subsp. sakei 2a is a bacteriocinogenic lactic acid bacteria isolated from a Brazilian meat
product, capable to inhibit Listeria monocytogenes in vitro and in foods. In this study, bacteriocin produced
by this strain were encapsulated in phosphatidylcholine (FC) and 1,2-dioleoyloxy-3-
trimethylammonium-propane (DOTAP) liposomes, separately and in combination, were characterized
and evaluated for activity against L. monocytogenes in vitro and in experimentally contaminated UHT goat
milk, during storage at 7 C for 14 days and 30 C for 24 h. The FC and DOTAP/FC (3:1) nanovesicles
containing bacteriocins (12.800 AU mL1) presented zeta potential of 1.54 and þ 38.13 mV, Entrapment
Efficiency of 80.0% and 94.1%, and diameter of 91.19 and 81.49 nm, respectively. DOTAP/FC nanovesicle
presented excellent stability, and maintained the same physicochemical characteristics over 28 days.