Probiotic assessment of Enterococcus faecalis CP58 isolated from human gut.


:A total of seventy lactic acid bacteria (LAB) were isolated from the faeces of healthy humans and their identities were confirmed by sequencing of their 16S rDNA genes. Of these only 5 isolates were found to resist bile salts and indicated survival in the simulated in vitro digestion assay which reproduces the stomach and intestinal digestion indicating their tolerance to gastric enzymes and the low pH conditions. Species that showed the best resistance to these conditions were: Lactobacillus casei, Lactobacillus sp., uncultured bifidobacteria, Enterococcus faecalis and Streptococcus anginosus. These strains were investigated further to study their capacity to adhere to human intestinal Caco-2 cells. E. faecalis was the most adherent strain. Examination of the virulence determinants for this strain indicated that it was positive for efaAfs, gelE, agg, cpd, cob, ccf and cad, a profile that is similar to that of many E. faecalis isolates from food sources. The cytolysin biosynthetic genes cylA, cylB and cylM that are more associated with the clinical isolates of E. faecium were not detected in this strain. The antibiotic susceptibility tests indicated that the strain was sensitive to vancomycin, tetracycline, rifampicin and erythromycin but resistant only to kanamycin and chloramphenicol. These data suggest that the strain E. faecalis CP58 may be tested further for beneficial properties and developed as a new probiotic.


Int J Food Microbiol


Nueno-Palop C,Narbad A




Has Abstract


2011-02-28 00:00:00














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  • Application of nontraditional meat starter cultures in production of Hungarian salami.

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