The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7
Background: Diarrheal diseases have been seen in all geographical areas throughout the world. Therefore, considering treatment, could be deemed a necessary action. Objective: The aim of this study was to determine the antimicrobial effect of probiotic bacterial strains isolated from different nat...
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Format: | Article |
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Electronic Physician
2018-03-01
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Series: | Electronic Physician |
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Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5942577/ |
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author | Sahar Karimi Fatemeh Azizi Mohammad Nayeb-Aghaee Leila Mahmoodnia |
author_facet | Sahar Karimi Fatemeh Azizi Mohammad Nayeb-Aghaee Leila Mahmoodnia |
author_sort | Sahar Karimi |
collection | DOAJ |
description | Background: Diarrheal diseases have been seen in all geographical areas throughout the world. Therefore,
considering treatment, could be deemed a necessary action.
Objective: The aim of this study was to determine the antimicrobial effect of probiotic bacterial strains isolated
from different natural sources against 2 pathotypes of pathogenic E. coli.
Methods: This cross-sectional study of Martyr Chamran University of Ahvaz was carried out from December
2013 to July 2014. A total of 13 probiotic colonies isolated from 20 samples of traditional dairy products
including (yogurt, cheese, milk) and 20 samples of vegetables including carrots and cabbages (red and white) of
which 5 isolates were selected to evaluate the antimicrobial effect against 2 Escherichia coli pathotypes,
randomly. Antimicrobial effect was evaluated using two methods: disk diffusion and well diffusion tests and
measuring growth inhibition zones of probiotics against 2 pathotypes of pathogenic E. coli.
Results: Obtained results showed growth inhibition effects of all 5 probiotic strains against Escherichia coli
pathotypes in both used methods. All selected strains showed considerable antimicrobial effect on Escherichia
coli O157:H7 strain, but had no inhibitory effect against Enterohemorrhagic Escherichia coli.
Conclusion: This study demonstrated considerable antimicrobial effect against E. coli O157:H7 strain. Due to
this, characteristic and similar antimicrobial effects of probiotics bacteria, increasing use of the probiotics as a
natural and modern method for prevention of different diseases is recommended. |
first_indexed | 2024-12-19T10:29:08Z |
format | Article |
id | doaj.art-3c7d6182ecd949a88fa8c124398ecd8d |
institution | Directory Open Access Journal |
issn | 2008-5842 2008-5842 |
language | English |
last_indexed | 2024-12-19T10:29:08Z |
publishDate | 2018-03-01 |
publisher | Electronic Physician |
record_format | Article |
series | Electronic Physician |
spelling | doaj.art-3c7d6182ecd949a88fa8c124398ecd8d2022-12-21T20:25:48ZengElectronic PhysicianElectronic Physician2008-58422008-58422018-03-011036548655310.19082/6548The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7Sahar KarimiFatemeh AziziMohammad Nayeb-AghaeeLeila MahmoodniaBackground: Diarrheal diseases have been seen in all geographical areas throughout the world. Therefore, considering treatment, could be deemed a necessary action. Objective: The aim of this study was to determine the antimicrobial effect of probiotic bacterial strains isolated from different natural sources against 2 pathotypes of pathogenic E. coli. Methods: This cross-sectional study of Martyr Chamran University of Ahvaz was carried out from December 2013 to July 2014. A total of 13 probiotic colonies isolated from 20 samples of traditional dairy products including (yogurt, cheese, milk) and 20 samples of vegetables including carrots and cabbages (red and white) of which 5 isolates were selected to evaluate the antimicrobial effect against 2 Escherichia coli pathotypes, randomly. Antimicrobial effect was evaluated using two methods: disk diffusion and well diffusion tests and measuring growth inhibition zones of probiotics against 2 pathotypes of pathogenic E. coli. Results: Obtained results showed growth inhibition effects of all 5 probiotic strains against Escherichia coli pathotypes in both used methods. All selected strains showed considerable antimicrobial effect on Escherichia coli O157:H7 strain, but had no inhibitory effect against Enterohemorrhagic Escherichia coli. Conclusion: This study demonstrated considerable antimicrobial effect against E. coli O157:H7 strain. Due to this, characteristic and similar antimicrobial effects of probiotics bacteria, increasing use of the probiotics as a natural and modern method for prevention of different diseases is recommended.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5942577/ProbioticsEnteropathogenesisEnterohemorrhagic Escherichia coli |
spellingShingle | Sahar Karimi Fatemeh Azizi Mohammad Nayeb-Aghaee Leila Mahmoodnia The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 Electronic Physician Probiotics Enteropathogenesis Enterohemorrhagic Escherichia coli |
title | The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 |
title_full | The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 |
title_fullStr | The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 |
title_full_unstemmed | The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 |
title_short | The antimicrobial activity of probiotic bacteria Escherichia coli isolated from different natural sources against hemorrhagic E. coli O157:H7 |
title_sort | antimicrobial activity of probiotic bacteria escherichia coli isolated from different natural sources against hemorrhagic e coli o157 h7 |
topic | Probiotics Enteropathogenesis Enterohemorrhagic Escherichia coli |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5942577/ |
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