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Abstract:

The study was conducted to evaluate the antibacterial activity of three bacteriocin-producing Enterococcus faecium strains (TW15, TW20 and TW22) isolated from ewes' milk and cheese sampled in the Patagonian region of Argentina. The strains were tested against spoilage and pathogens microorganisms showing antimicrobial activity towards 4 strains of Listeria monocytogenes, one strain of Listeria innocua and 2 strainsof Staphylococcus aureus. E.faecium TW15, E.faecium TW20 and E.faecium TW22 were sensitive to vancomycin. Furthermore, investigation of virulence factors revealed the absence of the genes encoding them. The bacteriocin-like substances (BLISs) produced by the 3 strains were thermostable, pH resistant and canbe expressed even in the presence of NaCl (3.0. g/100. g). Moreover, they prove to have a bactericidal mode of action. Results from physicochemical and biochemical characteristics of BLIS produced by these. E.faecium strains make them potential candidates to aid in preservation of foods. © 2011 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Antibacterial potential of Enterococcus faecium strains isolated from ewes' milk and cheese
Autor:Rivas, F.P.; Castro, M.P.; Vallejo, M.; Marguet, E.; Campos, C.A.
Filiación:Laboratorio de Microbiología de Alimentos, Universidad Nacional del Chaco Austral, Cdte, Fernández 755, Sáenz Peña, Chaco, 3700, Argentina
Cátedra de Biología Celular y Molecular, Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, Sede Trelew Roca 115, 1 Piso, 9100, Trelew, Chubut, Argentina
Departamento de Industrias, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Comandante Güiraldes s/n, Ciudad Universitaria, C.A.B.A., 1428, Argentina
Consejo Nacional de Investigaciones Cientificas Y Tecnicas de la Republica Argentina (CONICET), Argentina
Palabras clave:Bacteriocin-like substances; Enterococci; Ewes' cheese; Ewes' milk; Food biopreservation; Anti-bacterial activity; Anti-microbial activity; Argentina; Bacteriocin-like substances; Biochemical characteristics; Enterococci; Enterococcus faecium strains; Ewes' milk; Food biopreservation; Genes encoding; Listeria innocua; Listeria monocytogenes; Mode of action; Staphylococcus aureus; Vancomycin; Virulence factors; Bacilli; Biomaterials; Food preservation; Genes; Listeria; Microorganisms; Pathogens; Sodium chloride; Strain; Enterococcus; Enterococcus faecium; Listeria innocua; Listeria monocytogenes; Staphylococcus aureus
Año:2012
Volumen:46
Número:2
Página de inicio:428
Página de fin:436
DOI: http://dx.doi.org/10.1016/j.lwt.2011.12.005
Título revista:LWT - Food Science and Technology
Título revista abreviado:LWT - Food Sci. Technol.
ISSN:00236438
CODEN:LBWTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00236438_v46_n2_p428_Rivas

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Citas:

---------- APA ----------
Rivas, F.P., Castro, M.P., Vallejo, M., Marguet, E. & Campos, C.A. (2012) . Antibacterial potential of Enterococcus faecium strains isolated from ewes' milk and cheese. LWT - Food Science and Technology, 46(2), 428-436.
http://dx.doi.org/10.1016/j.lwt.2011.12.005
---------- CHICAGO ----------
Rivas, F.P., Castro, M.P., Vallejo, M., Marguet, E., Campos, C.A. "Antibacterial potential of Enterococcus faecium strains isolated from ewes' milk and cheese" . LWT - Food Science and Technology 46, no. 2 (2012) : 428-436.
http://dx.doi.org/10.1016/j.lwt.2011.12.005
---------- MLA ----------
Rivas, F.P., Castro, M.P., Vallejo, M., Marguet, E., Campos, C.A. "Antibacterial potential of Enterococcus faecium strains isolated from ewes' milk and cheese" . LWT - Food Science and Technology, vol. 46, no. 2, 2012, pp. 428-436.
http://dx.doi.org/10.1016/j.lwt.2011.12.005
---------- VANCOUVER ----------
Rivas, F.P., Castro, M.P., Vallejo, M., Marguet, E., Campos, C.A. Antibacterial potential of Enterococcus faecium strains isolated from ewes' milk and cheese. LWT - Food Sci. Technol. 2012;46(2):428-436.
http://dx.doi.org/10.1016/j.lwt.2011.12.005