DETERMINATION OF BACTERIOCIN GENES AND ANTIBACTERIAL ACTIVITY OF LACTOBACILLUS STRAINS ISOLATED FROM FECAL OF HEALTHY INDIVIDUALS

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HASANNEJAD BIBALAN MEYSAM; ESHAGHI SEYYED MORTEZA; ROHANI MAHDI; POURSHAFIE MOHAMMAD REZA; TALEBI MALIHEH

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Journal: International Journal of Molecular and Cellular Medicine Year:2017 | Volume:6 | Issue:1 Page(s): 50-55

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Title

DETERMINATION OF BACTERIOCIN GENES AND ANTIBACTERIAL ACTIVITY OF LACTOBACILLUS STRAINS ISOLATED FROM FECAL OF HEALTHY INDIVIDUALS

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Keywords

LACTOBACILLUS

BACTERIOCIN GENES

ANTIBACTERIAL ACTIVITY

HEALTHY INDIVIDUAL

Abstract

LACTOBACILLUSspecies play a major role in gastrointestinal (GI) tract function, intestinal microbiota balance, and the immune system activity by exerting a strong activity against many intestinal pathogens. The aim of this study was to isolateLACTOBACILLUS species from fecal samples, investigate their antimicrobial properties, and characterize their bacteriocin encoding genes.48 fecal samples were grown in MRS broth and then MRS agar.The colonies grown in MRS agar were selected and identified by PCR.72LACTOBACILLUS species were obtained from 434 lactic acid bacteria (LAB) strains. Approximately 40% of allLACTOBACILLUS isolates had antimicrobial activity against one or more microorganisms and 17.4% of them were active against all four indicator bacteria.The frequency of bacteriocin encoding genes were 5 (6.9%), 3 (4.1%) and 5 (6.9%) for Gassericin A, Plantaricin S and Laf operon, respectively. pH alteration had no effect on ANTIBACTERIAL ACTIVITY, but in the alkaline range these activities were reduced and the strains showed the highest ANTIBACTERIAL ACTIVITY after 48 h incubation. These data indicate that the majority of isolates were susceptible to GI tract or belonged to other bacterial forms such as viable but nonculturable (VBNC). The detection of bacteriocin encoding genes in about only 6% of all LACTOBACILLUSisolates seems to be due to the existence of many other bacteriocin encoding genes in LACTOBACILLUSspecies which were not tested. Further study of the bacteriocin gene clusters, types, subtypes and the probiotic effect of these strains will contribute to a better characterization of these isolates.

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APA: Copy

HASANNEJAD BIBALAN, MEYSAM, ESHAGHI, SEYYED MORTEZA, ROHANI, MAHDI, POURSHAFIE, MOHAMMAD REZA, & TALEBI, MALIHEH. (2017). DETERMINATION OF BACTERIOCIN GENES AND ANTIBACTERIAL ACTIVITY OF LACTOBACILLUS STRAINS ISOLATED FROM FECAL OF HEALTHY INDIVIDUALS. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE, 6(1), 50-55. SID. https://sid.ir/paper/332182/en

Vancouver: Copy

HASANNEJAD BIBALAN MEYSAM, ESHAGHI SEYYED MORTEZA, ROHANI MAHDI, POURSHAFIE MOHAMMAD REZA, TALEBI MALIHEH. DETERMINATION OF BACTERIOCIN GENES AND ANTIBACTERIAL ACTIVITY OF LACTOBACILLUS STRAINS ISOLATED FROM FECAL OF HEALTHY INDIVIDUALS. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE[Internet]. 2017;6(1):50-55. Available from: https://sid.ir/paper/332182/en

IEEE: Copy

MEYSAM HASANNEJAD BIBALAN, SEYYED MORTEZA ESHAGHI, MAHDI ROHANI, MOHAMMAD REZA POURSHAFIE, and MALIHEH TALEBI, “DETERMINATION OF BACTERIOCIN GENES AND ANTIBACTERIAL ACTIVITY OF LACTOBACILLUS STRAINS ISOLATED FROM FECAL OF HEALTHY INDIVIDUALS,” INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE, vol. 6, no. 1, pp. 50–55, 2017, [Online]. Available: https://sid.ir/paper/332182/en

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