year 12, Issue 2 (May - June 2018)                   Iran J Med Microbiol 2018, 12(2): 96-106 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Hossein alipour E, Mardani K, Moradi M. Isolation and Identification of Lactobacillus salivarius from Buffalo Milk and Evaluation of Its Antimicrobial Activity. Iran J Med Microbiol. 2018; 12 (2) :96-106
1- Department of Microbial Biotechnology, Faculty of Basic Science, Payam Noor Univercity, East of Tehran, Tehran, Iran
2- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
3- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran ,
Abstract:   (5240 Views)

Background and Aims: Lactobacillus salivarius is a well-known probiotic bacterium, which is commonly isolated from gastro-intestinal tract of human and animals. The objectives of the present study were isolation, molecular detection and antimicrobial characterization of L. salivarius from buffalo’s raw milk.
Materials and Methods: A total number of 20 buffalo milk samples were collected aseptically from traditional buffalo farms in Urmia city, Iran. Milk samples were cultured and incubated on MRS agar, then suspected colonies were primarily determined according to their appearance and biochemical characteristics. Bacteria species were confirmed by polymerase chain reaction accompanied by restriction fragment length polymorphism (PCR-RFLP) and nucleotide sequencing of 16s rRNA gene. Antimicrobial activity of L. salivarius against pathogenic bacteria including Listeria monocytogenesis, Escherichia coli, Salmonella typhimurium, and Staphylococcus aureus was examined using agar-spot and agar-disk diffusion methods. Cell surface hydrophobicity of L. salivarius was also investigated according to microbial adhesion to xylene and toluene hydrocarbons
Results: From 60 suspected colonies which were selected according to phenotypic characteristics, 23 colonies were confirmed as lactic acid bacteria based on the molecular identification. Only one isolate belonged to L. salivarius. The antimicrobial activity results showed a significant growth inhibitory effect of L. salivarius on pathogenic bacteria comparing to standard bacteria. L. salivarius had the most inhibitory effect on S. aureus while it had the least  inhibitory against S. typhimurium. The hydrophobicity of L. salivarius to xylene and toluene were 55.3% and 55.6% respectively.
Conclusions: Based on the results, the frequency of the Lactobacillus genus s was very low in buffalo milk. In addition, isolated L. salivarius had strong antimicrobial activity against pathogenic bacteria.

Full-Text [PDF 1000 kb]   (939 Downloads)    
Type of Study: Original | Subject: Food Microbiology
Received: 2017/05/28 | Accepted: 2018/04/29 | ePublished: 2018/06/30

Add your comments about this article : Your username or Email:

Send email to the article author

© 2020 All Rights Reserved | Iranian Journal of Medical Microbiology

Designed & Developed by : Yektaweb | Publisher: Farname Inc