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170216

BACTERIOCIN PRODUCTION AND PROBIOTIC PROPERTIES OF ENTEROCOCCUS SPP. ISOLATED FROM RAW MILK

Article

Last updated: 23 Jan 2023

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Abstract

Little is known about using Enterococcus strains as probiotics in the dairy industry in the Middle East. The aim of this study was to analyze the probiotic properties of Enterococcus spp. isolated from 75 raw milk samples. Overall, 65 milk samples (86.66%, 65/75) analyzed were contaminated with enterococci. 70 presumptive enterococcal isolates were recovered, and 60 isolates were confirmed by PCR as Enterococcus spp. E. faecium and E. faecalis were detected in 28 (28/60) and 12 (12/60) of isolates, respectively. Fifteen isolates showed negative results in safety relevant characteristics including antibiotic susceptibility and virulence gene profile. Seven strains showed antimicrobial activities towards Staphylococcus aureus and two strains showed antimicrobial activities against Listeria monocytogenes and 6 strains showed antimicrobial activities towards both pathogens. None of the isolates showed antimicrobial activities towards Gram negative bacteria tested in this study. Some strains showed survival in gastric juice after 2 hours and all isolates showed survival in different degree in bile after 24 hours. PCR analysis revealed that six strains carried both enterocins A and B. Neither enterocin L nor enterocin P genes were detected in isolated strains. In conclusion, the results obtained in this study showed that six E. faecium strains have great potential to be used as probiotic organisms in human food and/or animal feed.

DOI

10.21608/avmj.2015.170216

Keywords

Key words: Bacteriocin, probiotic, Enterococcus spp, Raw milk

Authors

First Name

AHMED

Last Name

MOUSTAFA HAMMAD

MiddleName

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Affiliation

Department of Food Hygiene and Control, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Egypt.

Email

hammad@vet.usc.edu.eg

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Orcid

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Volume

61

Article Issue

146

Related Issue

24322

Issue Date

2015-07-01

Receive Date

2015-06-29

Publish Date

2015-07-01

Page Start

80

Page End

86

Print ISSN

1012-5973

Online ISSN

2314-5226

Link

https://avmj.journals.ekb.eg/article_170216.html

Detail API

https://avmj.journals.ekb.eg/service?article_code=170216

Order

10

Type

Research article

Type Code

1,840

Publication Type

Journal

Publication Title

Assiut Veterinary Medical Journal

Publication Link

https://avmj.journals.ekb.eg/

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Article

Created At

23 Jan 2023