Cited by 59Probiotics and Fermented FoodsReproductive tract infections researchInfant Nutrition and Health

In-vitro characterization of potentially probiotic Lactobacillus strains isolated from human microbiota: Interaction with pathogenic bacteria and the enteric cell line HT29

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Gharbi, Yosra, Fhoula, Imene, Ruas-Madiedo, Patricia, Afef, Najjari, Boudabous, Abdellatif, Gueimonde, Miguel, Ouzari, Hadda-Imene·2019·Annals of Microbiology

Abstract

Among the various tests commonly used for selecting probiotic microorganisms, the tolerance to gastrointestinal transit conditions remains being commonly used to evaluate the probiotic potential of the strains. Besides, the adhesion to epithelial cells and the competition with pathogens constitute significant traits for evaluating the colonization ability and functional performance of candidate strains. In this study, a total of 13 lactic acid bacteria strains isolated from human feces were first identified by biochemical tests and 16S rRNA gene sequencing, and then characterized in vitro for their tolerance to gastrointestinal conditions, hemolytic activity, and antibiotics sensibility. The isolates were identified as Lactobacillus fermentum (06), Lactobacillus rhamnosus (04), Lactobacillus plantarum (02), and Lactobacillus salivarius (01). The adhesion to epithelial cells HT29 was shown to be a strain-dependent character. L. fermentum 88 and L. plantarum 9, being the ones showing higher adhesion values. They were further characterized by determining their antimicrobial activity, hydrophobicity, co-aggregation, antioxidant activity, as well as the ability to inhibit the adhesion of pathogens to the human epithelial cell line HT29. Moreover, these two strains were able to reduce the adhesion of Escherichia coli to HT29 cells, although they failed for inhibiting the adhesion of other pathogens such as Cronobacter sakazaki or Salmonella enterica. These results point out the importance of considering the ecological fitness of the strains in selecting probiotic bacteria and the potential of some of the analyzed strains for the development of food products.

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Crossref · 10.1007/s13213-018-1396-1

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Authors
Gharbi, Y., Fhoula, I., Ruas-Madiedo, P., Afef, N., Boudabous, A., Gueimonde, M., & Ouzari, H.-I.
Affiliations
  • Tunis El Manar University (TN)
  • Consejo Superior de Investigaciones Científicas (ES)
Corresponding author
Ouzari, Hadda-Imene
Venue
Annals of Microbiology
Published
2018-11-08
Volume
69
Issue
1
Pages
61-72
ISSN
  • 0003-4649 (ISSN-L)
  • 1590-4261
  • 1869-2044
OpenAlex
W2900081774
Cited by
59
References
60
Citations by year
2026: 2 · 2025: 11 · 2024: 7 · 2023: 6 · 2022: 14 · 2021: 8 · 2020: 10 · 2019: 1
FWCI
4.47
Type
journal article
Language
en
Open access
Locations
  • Annals of Microbiology (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Immunology and Microbiology › Microbiology › Reproductive tract infections research
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
Keywords
probiotic Lactobacillus, Lactobacillus fermentum, Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus salivarius, human fecal microbiota, antimicrobial activity, co-aggregation, antioxidant activity, hydrophobicity, hemolytic activity, antibiotic susceptibility, pathogen adhesion inhibition, Salmonella enterica, lactic acid bacteria

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