http://www.cnr.it/ontology/cnr/individuo/prodotto/ID262938
Biopreservation potential of E. faecalis isolated from Italian traditional raw milk cheeses (Articolo in rivista)
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- Label
- Biopreservation potential of E. faecalis isolated from Italian traditional raw milk cheeses (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1080/19476337.2013.825327 (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Silvetti T, Morandi S, Brasca M (literal)
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- Titolo
- Biopreservation potential of E. faecalis isolated from Italian traditional raw milk cheeses (literal)
- Abstract
- Frecuentemente, el Enterococcus faecalis es asociado con los quesos de leche cruda de la región mediterránea. En el presente estudio se valoró la diversidad genética de 38 E. faecalis obtenidos de productos de leche cruda de Italia, mediante RAPD-PCR y rep-PCR. Se estudió la actividad antimicrobiana de las cepas a partir de cinco bacterias patógenas y saprófitas de origen alimentario y de 13 bacterias de ácido láctico (BAL) utilizadas comúnmente como cultivos iniciadores. Con el objetivo de identificar el potencial bacteriocinagénico mediante la búsqueda de genes de codificación de bacteriocinas, se realizaron investigaciones, detectándose efectos inhibitorios contra bacterias indeseables, entre las que se incluyen Bacillus cereus (44.7% de las cepas), Escherichia coli (18.4%), Listeria monocytogenes (15.8%), Staphylococcus aureus (2.6%) y Clostridium sporogenes (21.1%). Asimismo, se constató un moderado antagonismo contra las BAL y se identificó una cepa que produce enterocina AS-48, lo cual sugiere que la actividad antimicrobiana de los aislados fenotípicamente positivos es consecuencia de otro factor diferente a la enterocina. El estudio arrojó una comprensión más profunda sobre el potencial de biopreservación de E. faecalis en lácteos, destacándose la influencia de esta especie dentro de la comunidad microbiana de los quesos. (literal)
- Mediterranean area. The genetic diversity of 38 E. faecalis isolates obtained from raw milk products in Italy was assessed through RAPD-PCR and Rep-PCR. The isolates were then screened for their antimicrobial activity against 5 food-borne spoilage and pathogenic bacteria, but also 13 technologically useful micro-organisms, commonly used as dairy starter cultures. Investigation was made to identify the bacteriocinogenic potential by searching for bacteriocin-encoding genes. Inhibitory effects against harmful or detrimental microbial species, including Bacillus cereus (44.7% of strains), Escherichia coli (18.4%), Listeria monocytogenes (15.8%), Staphylococcus aureus (2.6%), and Clostridium sporogenes (21.1%), were detected. Moderate antagonism towards lactic acid bacteria was found. Only gene for enterocin AS-48 was identified, suggesting that the antimicrobial activity of the phenotypically positive isolates should be necessarily due to another enterocin or non-enterocin factor. A deeper insight into biopreservation potential of dairy E. faecalis was provided. (literal)
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