Antimicrobial Activity Of Bifidobacterial Cells And Supernatant Against B. Cereus ATCC 9884

  • Choukri TEFIANI
  • Djilali BENABDELMOUMENE
  • Abdelmalek CHAALEL
  • Nawal BOUKEZZOULA
  • Mimoune SOUNA
  • Ghada LAMRAOUI
  • Bahia MEROUFEL
  • Mohamed Amine ZENASNI
  • Ali RIAZI
Keywords: Bifidobacteria, Bacillus cereus, Antagonistic capacity, Concentrated supernatant, Organic solvents, Bacteriocin-like activity

Abstract

The aim of this work was to test three experimental strains (isolated from the faeces of exclusively breast-fed babies: Bbv1, Bbv2 and BLE) and a reference strain (BLR) of bifidobacteria for their antagonistic capacity towards Bacillus cereus ATCC 9884. The antagonism of these strains was studied using two methods: one consisted of co-cultivating them at 37°C with B. cereus and the other of bringing the concentrated supernatant of their culture into contact with that of B. cereus at 37 and 6°C. The effect of a series of organic solvents on the inhibitory power of bifidobacteria strains towards B. cereus was also explored. The results obtained indicate that at 37°C, the concentrated supernatants from bifidobacteria cultures exert an antagonistic effect towards B. cereus that is much greater than that observed when bifidobacteria strains are co-cultured with the pathogen strain under study. At low temperatures (6°C), the inhibitory power of the concentrated supernatants of the bifidobacteria cultures on B. cereus is greatly reduced and spread out over time, since 48h of contact allows only 60% inhibition on average. The speed of inhibition of B. cereus by bifidobacteria supernatants also highlights this latency of action at 6°C. Organic solvents such as formaldehyde, chloroform, acetone, hexane, isobutanol, methanol and diethyl ether had no effect on the antagonism of the concentrated supernatants from the bifidobacteria cultures tested against this pathogenic germ. This suggests that these solvents do not denature protein substances with antagonistic (i.e. bacteriocin-like) activity.

Author Biographies

Choukri TEFIANI

Laboratory of Functional Agrosystems and Technologies of Agronomic Sectors, Department of Agronomy, Faculty of Natural and Life Sciences, Earth and Universe Sciences, University of Abou Bekr Belkaïd, Tlemcen  13000, Algeria

Djilali BENABDELMOUMENE

Applied Animal Physiology Laboratory, Abdelhamid Ibn Badis University, Mostaganem 27000, Algeria

Abdelmalek CHAALEL

Laboratory of Beneficial Microorganisms, Functional Food and Health, Faculty of Natural Sciences and Life, Abdelhamid Ibn Badis University of Mostaganem, 27000, Algeria;

Nawal BOUKEZZOULA

Laboratory of Beneficial Microorganisms, Functional Food and Health, Faculty of Natural Sciences and Life, Abdelhamid Ibn Badis University of Mostaganem, 27000, Algeria;

Mimoune SOUNA

Laboratory of Functional Agrosystems and Technologies of Agronomic Sectors, Department of Agronomy, Faculty of Natural and Life Sciences, Earth and Universe Sciences, University of Abou Bekr Belkaïd, Tlemcen  13000, Algeria

Ghada LAMRAOUI

Laboratory of Functional Agrosystems and Technologies of Agronomic Sectors, Department of Agronomy, Faculty of Natural and Life Sciences, Earth and Universe Sciences, University of Abou Bekr Belkaïd, Tlemcen  13000, Algeria

Bahia MEROUFEL

Laboratory of Functional Agrosystems and Technologies of Agronomic Sectors, Department of Agronomy, Faculty of Natural and Life Sciences, Earth and Universe Sciences, University of Abou Bekr Belkaïd, Tlemcen  13000, Algeria

Mohamed Amine ZENASNI

Laboratory of Functional Agrosystems and Technologies of Agronomic Sectors, Department of Agronomy, Faculty of Natural and Life Sciences, Earth and Universe Sciences, University of Abou Bekr Belkaïd, Tlemcen  13000, Algeria

Ali RIAZI

Laboratory of Beneficial Microorganisms, Functional Food and Health, Faculty of Natural Sciences and Life, Abdelhamid Ibn Badis University of Mostaganem, 27000, Algeria;

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Published
2024-12-09
How to Cite
Choukri TEFIANI, Djilali BENABDELMOUMENE, Abdelmalek CHAALEL, Nawal BOUKEZZOULA, Mimoune SOUNA, Ghada LAMRAOUI, Bahia MEROUFEL, Mohamed Amine ZENASNI, & Ali RIAZI. (2024). Antimicrobial Activity Of Bifidobacterial Cells And Supernatant Against B. Cereus ATCC 9884. Revista Electronica De Veterinaria, 25(2), 626-634. https://doi.org/10.69980/redvet.v25i2.1464