Logo-ajcmi
Submitted: 15 Apr 2019
Accepted: 30 Apr 2019
First published online: 31 May 2019
EndNote EndNote

(Enw Format - Win & Mac)

BibTeX BibTeX

(Bib Format - Win & Mac)

Bookends Bookends

(Ris Format - Mac only)

EasyBib EasyBib

(Ris Format - Win & Mac)

Medlars Medlars

(Txt Format - Win & Mac)

Mendeley Web Mendeley Web
Mendeley Mendeley

(Ris Format - Win & Mac)

Papers Papers

(Ris Format - Win & Mac)

ProCite ProCite

(Ris Format - Win & Mac)

Reference Manager Reference Manager

(Ris Format - Win only)

Refworks Refworks

(Refworks Format - Win & Mac)

Zotero Zotero

(Ris Format - FireFox Plugin)

Avicenna J Clin Microbiol Infect. 2019;6(2):66-74.
doi: 10.15171/ajcmi.2019.13
  Abstract View: 45
  PDF Download: 25

Research Article

Isolation of Lactobacillus plantarum Strains With Robust Antagonistic Activity, Qualified Probiotic Properties, and Without Antibiotic-resistance From Traditional Sourdough

Mina Zangeneh 1 ORCID logo, Moj Khaleghi 2 * ORCID logo, Sadegh Khorrami 2 ORCID logo

1 Department of Biology, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran
2 Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran

Abstract

Background: The main purpose of the present study was to identify the qualified probiotic strains of traditional sourdough and to find stable Lactobacillus strains with enhanced antibacterial/antagonistic activity and without antibiotic resistance.

Methods: Sixteen strains were isolated from traditional sourdough and their susceptibility was evaluated toward a number of different antibiotics. In addition, the isolated strains were assessed with respect to their probiotic properties, antagonistic activity, and resistance to low pH, bile salt, different NaCl concentrations, and low storage temperatures.

Results: Based on the results, although none of the strains had considerable antibiotic resistance, they showed significant antagonistic activity against 6 different pathogens. Among the isolates, H3a and K3b were the most resistant to low pH and bile salt (0.3%) and demonstrated most hydrophobicity, auto-aggregation, and coaggregation characteristics. It was also observed that the strains could produce strong biofilm and were viable at 1%-10% NaCl concentrations, as well as at 4° C and -20° C. Finally, the sequencing results revealed that these 2 strains had the highest homology to Lactobacillus plantarum based on the 16S rRNA gene.

Conclusions: The present data confirmed the safety of Lactobacillus content of the traditional sourdough and the unique probiotic properties of these strains.

Keywords: Antagonistic activity, Antibiotic resistance, Lactobacillus plantarum, Probiotic, Sourdough
First name
 
Last name
 
Email address
 
Comments
 
Security code


Article Viewed: 45

Your browser does not support the canvas element.


PDF Downloaded: 25

Your browser does not support the canvas element.