THE INHIBITORY EFFECTS OF 2 COMMERCIAL PROBIOTIC STRAINS ON THE GROWTH OF STAPHYLOCOCCUS AUREUS AND GENE EXPRESSION OF ENTEROTOXIN A

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Parsaeimehr Mahnoosh; AZIZKHANI MARYAM; JEBELLI JAVAN ASHKAN

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Journal Paper

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Journal: International Journal of Enteric Pathogens Year:2017 | Volume:5 | Issue:3 Page(s): 70-75

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Title

THE INHIBITORY EFFECTS OF 2 COMMERCIAL PROBIOTIC STRAINS ON THE GROWTH OF STAPHYLOCOCCUS AUREUS AND GENE EXPRESSION OF ENTEROTOXIN A

Author(s)

Parsaeimehr Mahnoosh | AZIZKHANI MARYAM | JEBELLI JAVAN ASHKAN | Issue Writer Certificate

Keywords

LACTIC ACID BACTERIA

ENTEROTOXIN

GENE EXPRESSION

STAPHYLOCOCCUS AUREUS

Abstract

Background: Food-borne intoxications are current problems in human society and most of them are caused by the ENTEROTOXINs of STAPHYLOCOCCUS AUREUS. Staphylococcal ENTEROTOXIN A (SEA) is the most frequently responsible for staphylococcal food poisoning outbreaks. From a food safety and human health point of view, LACTIC ACID BACTERIA (LAB) may provide a promising strategy to combat the pathogenic bacteria, particularly S. aureus.Objective: The objective of this study was to evaluate the inhibitory activity of two commercial lactobacillus strains on growth and ENTEROTOXIN A production by S. aureus. Moreover, the inhibitory effect of these strains on GENE EXPRESSION of ENTEROTOXIN type A was assessed using real-time Polymerase chain reaction (PCR).Materials and Methods: In this study the inhibitory effect of two commercial probiotic strains, Lactobacillus acidophilus (LA5) and Lactobacillus casei 01 on the growth and ENTEROTOXIN production of S. aureus was evaluated at 25 and 35°C. The GENE EXPRESSION of SEA of S. aureus was also evaluated by real time (RT) PCR technique.Results: The lactobacillus strains decreased the bacterial count at both temperatures compared with the control group. This reduced effect was greater at 25°C (3 log/CFU) than 35oC (2 log/CFU). The production of SEA, SEC and SEE was inhibited by the lactobacillus strains. Furthermore, the GENE EXPRESSION of SEA was significantly suppressed in S. aureus co cultured with studied lactobacillus strains and the greatest down-regulation of sea (10.31 fold) was observed in co-incubation of S. aureus with LC01 at 25oC.Conclusion: This research raises important implications for the potential use of LAB as a natural preservative in foodstuffs by correct microbial ecology of the environment and a new approach for biocontrol of S. aureus.

Cites

The Isolation and Identification of Dominant Lactic Acid Bacteria by the Sequencing of the 16S rRNA in Traditional Cheese (Khiki) in Semnan, Iran

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APA: Copy

Parsaeimehr, Mahnoosh, AZIZKHANI, MARYAM, & JEBELLI JAVAN, ASHKAN. (2017). THE INHIBITORY EFFECTS OF 2 COMMERCIAL PROBIOTIC STRAINS ON THE GROWTH OF STAPHYLOCOCCUS AUREUS AND GENE EXPRESSION OF ENTEROTOXIN A. INTERNATIONAL JOURNAL OF ENTERIC PATHOGEN, 5(3), 70-75. SID. https://sid.ir/paper/347582/en

Vancouver: Copy

Parsaeimehr Mahnoosh, AZIZKHANI MARYAM, JEBELLI JAVAN ASHKAN. THE INHIBITORY EFFECTS OF 2 COMMERCIAL PROBIOTIC STRAINS ON THE GROWTH OF STAPHYLOCOCCUS AUREUS AND GENE EXPRESSION OF ENTEROTOXIN A. INTERNATIONAL JOURNAL OF ENTERIC PATHOGEN[Internet]. 2017;5(3):70-75. Available from: https://sid.ir/paper/347582/en

IEEE: Copy

Mahnoosh Parsaeimehr, MARYAM AZIZKHANI, and ASHKAN JEBELLI JAVAN, “THE INHIBITORY EFFECTS OF 2 COMMERCIAL PROBIOTIC STRAINS ON THE GROWTH OF STAPHYLOCOCCUS AUREUS AND GENE EXPRESSION OF ENTEROTOXIN A,” INTERNATIONAL JOURNAL OF ENTERIC PATHOGEN, vol. 5, no. 3, pp. 70–75, 2017, [Online]. Available: https://sid.ir/paper/347582/en

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