RT Journal Article
T1 Enterocins Produced by Enterococci Isolated from Breast-Fed Infants: Antilisterial Potential
A1 Landete, José María
A1 Montiel, Raquel
A1 Rodríguez Mínguez, Eva
A1 Arqués Orobón, Juan Luis
AB Enterocins are bacteriocins synthesized by Enterococcus strains that show an interesting antimicrobial effectiveness against foodborne pathogens such as Listeria monocytogenes. The objectives of this study were to identify and analyze the expression of enterocin genes of Enterococcus isolated from breast-fed infants and evaluate their ability to inhibit three human isolates of virulent L. monocytogenes, as well as some probiotic bacteria. The susceptibility of the strains of L. monocytogenes to fifteen antibiotics was tested, detecting their resistance to cefoxitin (constitutively resistant), oxacillin, and clindamycin. The production of enterocins A, B, and P was observed in Enterococcus faecium isolates, while enterocin AS-48 was detected in an Enterococcus faecalis isolate. AS-48 showed antilisterial activity by itself, while the joint action of enterocins A and B or B and P was necessary for inhibiting L. monocytogenes, demonstrating the synergistic effect of those combinations. The presence of multiple enterocin genes does not assure the inhibition of L. monocytogenes strains. However, the expression of multiple enterocin genes showed a good correlation with the inhibition capacity of these strains. Furthermore, the potential beneficial strains of lactobacilli and bifidobacteria examined were not inhibited by any of the enterocins produced individually or in combination, with the exception of Bifidobacterium longum BB536, which was inhibited by enterocin AS-48 and the joint production of enterocins A and B or B and P. The enterocins studied here could be candidates for developing alternative treatments against antibiotic-resistant bacterial infections. Moreover, these selected enterocin-producing E. faecium strains isolated from breast-fed infants could be used as probiotic strains due to their antilisterial effect, as well as the absence of virulence factors.
PB MDPI
SN 2227-9067
YR 2024
FD 2024-02-17
LK https://hdl.handle.net/20.500.14352/103396
UL https://hdl.handle.net/20.500.14352/103396
LA eng
NO Landete, J.M.; Montiel, R.; Rodríguez-Mínguez, E.; Arqués, J.L. Enterocins Produced by Enterococci Isolated from Breast-Fed Infants: Antilisterial Potential. Children 2024, 11, 261. https://doi.org/10.3390/ children11020261
NO Author contributions: J.M.L., R.M., E.R.-M. and J.L.A. have made a substantial, direct, and intellectual contribution to the work and approved it for publication. All authors have read and agreed to the published version of the manuscript.
NO Ministerio de Ciencia e Innovación
DS Docta Complutense
RD 11 abr 2025