Probiotic properties of lactic acid bacteria isolated from human milk
| Autor: | M.A.F. Saraiva, Elizabeth Amélia Alves Duarte, Nayara Alves Reis, Norma Suely Evangelista-Barreto, Brenda Borges Vieira, E.A. de Carvalho |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
030106 microbiology medicine.disease_cause Applied Microbiology and Biotechnology Enterococcus faecalis Microbiology law.invention 03 medical and health sciences Probiotic chemistry.chemical_compound Listeria monocytogenes law medicine Humans Lactic Acid biology Bacteria Milk Human Probiotics General Medicine biology.organism_classification Antimicrobial Lactic acid 030104 developmental biology Enterococcus chemistry Salmonella enterica Female Biotechnology |
| Zdroj: | Journal of applied microbiology. 121(3) |
| ISSN: | 1365-2672 |
| Popis: | Aim The objective of this study was to identify and characterize lactic acid bacteria isolated from human milk, with an emphasis on their probiotic properties. Methods and Results The strains were tested for their ability to inhibit growth of Enterococcus faecalis, Salmonella enterica subsp. enterica serotype Enteritidis, Listeria monocytogenes, Staphylococcus aureus and Escherichia coli, as well as for susceptibility to antimicrobial agents and for acid pH and bile salt tolerance. Gram-positive and catalase-negative were selected and identified as Enterococcus (83·3%) after sequencing the 16S rDNA gene. All the isolates inhibited growth of Ent. faecalis and S. serotype Enteritidis, 97% inhibited growth of L. monocytogenes and Staph. aureus and 78·8% inhibited growth of E. coli. Most of the isolates were resistant to gentamicin (50%) and vancomycin (47%). Twelve isolates grew when subjected to pH 3·0 and 0·1% bile salts. At lower pH (2·5–2·0), Ent. faecalis F1 and Weissella confusa F8 were more efficient. Conclusion It was possible to isolate from human milk the lactic acid bacteria with potential for use as probiotics. Significance and Impact of the Study Lactic acid bacteria isolated of nursing mothers have probiotic properties. |
| Databáze: | OpenAIRE |
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