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Inhibition of listeria monocytogenes in minas frescal cheese by free and nanovesicle-encapsulated nisin

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Inhibition of listeria monocytogenes in minas frescal cheese by free and nanovesicle-encapsulated nisin

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Título Inhibition of listeria monocytogenes in minas frescal cheese by free and nanovesicle-encapsulated nisin
Autor Malheiros, Patricia da Silva
Daroit, Daniel Joner
Brandelli, Adriano
Abstract The effectiveness of free and nanovesicle-encapsulated nisin to control Listeria monocytogenes in Minas Frescal cheese was investigated. Commercial nisin was encapsulated into liposomes of partially purified soy lecithin. Free (0.1 mg/mL and 0.25 mg/mL) and nanovesicle-encapsulated nisin (0.25 mg/mL) were applied onto the surface of cheese samples, and L. monocytogenes was inoculated before incubation at 6-8°C for 28 days. A bactericidal effect was observed with 0.25 mg/mL free nisin; a bacteriostatic effect was observed for liposome-encapsulated nisin and 0.1 mg/mL free nisin. Free nisin was more efficient than nisin-loaded liposomes in controlling L. monocytogenes. Possible reasons for this behavior, and also the significance of nisin to soft cheeses are discussed. Nisin acted as a suitable barrier within hurdle technology, potentially extending the shelf-life and safety of fresh cheeses.
Contido em Brazilian journal of microbiology. São Paulo. Vol. 43, no. 4 (oct./dez. 2012), p. 1414-1418
Assunto Bacteriocina
Listeria monocytogenes
Nisina
Queijo
[en] Cheese
[en] Encapsulation
[en] Liposome
[en] Listeria monocytogenes
[en] Nisin
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/100113
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