lunes, 30 de junio de 2008

Bacteria strain shows promise as natural meat preservative.

E. faecalis strain can provide a natural preservative for craft dry-fermented sausages.
This research, published recently, demonstrates the protective benefits the strain has against harmful bacteria without compromising on the taste and texture of the sausage.As part of a general shift towards natural and organic foods, consumers increasing prefer foods that do not contain synthetic preservatives or antimicrobial agents.However, food safety must also remain a top priority for manufacturers, opening up new challenges to make safe foods that meet both the natural/organic and the food safety criteria.
According to the researchers, the study "would indicate that the addition of E. faecalis CECT7121 during the manufacture of craft dry-fermented sausages offers an interesting alternative for biopreservation".They said it was an important study as poor hygiene conditions have been found to cause the loss of up to 25 per cent of the production, and there are few studies on meat products fermented at medium pH values.Lactic acid bacteria (LAB) have been identified as the most adequate microorganism for the natural preservation of food.The study's authors wrote: "Among the LAB, those belonging to the genus Enterococcus have antimicrobial activity, can proliferate among the pre-existing microflora and are important in the process of fermentation and preservation of food." The E. faecalis strain was added to the manufacture of craft dry-fermented sausages and then its effectiveness as a biopreservative was analyzed.It does not contain the genes for haemolysin, which would affect the meat content, or gelatinase, which could result in a change in texture.Also, importantly, the researchers found no difference in color, aroma, taste or overall quality of the inoculated sausages when compared to the controls, meeting the vital criteria to provide equally tasty products without the use of artificial additives.The researchers concluded: "In this work it was demonstrated that E. faecalis CECT7121 does not express virulence factors, does not produce biogenic amines as undesirable compounds and is devoid of a capsule."

Source: Food Microbiology, June 2008
Aporte: Guillermo Figueroa

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