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Related Experiment Video

Updated: Jul 7, 2026

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice
07:54

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice

Published on: July 25, 2017

Diverse antimicrobial killing by Enterococcus faecium E 50-52 bacteriocin.

Edward A Svetoch1, Boris V Eruslanov, Vladimir V Perelygin

  • 1State Research Center for Applied Microbiology and Biotechnology (SRCAMB), Obolensk, Russian Federation.

Journal of Agricultural and Food Chemistry
|February 26, 2008
PubMed
Summary

A novel bacteriocin, E 50-52, effectively targets pathogenic bacteria including Campylobacter jejuni and Salmonella. This potent antimicrobial peptide shows promise as a safe, antibiotic alternative in food production and animal health.

Related Experiment Videos

Last Updated: Jul 7, 2026

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice
07:54

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice

Published on: July 25, 2017

Area of Science:

  • Microbiology
  • Food Science
  • Biochemistry

Background:

  • Bacterial infections pose significant threats to food safety and animal health.
  • Antibiotic resistance necessitates the development of novel antimicrobial agents.
  • Lactic acid bacteria produce bacteriocins, which are antimicrobial peptides with therapeutic potential.

Purpose of the Study:

  • To identify and characterize a bacteriocin from Enterococcus faecium with activity against Campylobacter jejuni.
  • To evaluate the efficacy of the purified bacteriocin in a broiler model.

Main Methods:

  • Screening of lactic acid bacteria against Campylobacter jejuni.
  • Purification of bacteriocin E 50-52 to homogeneity.
  • Determination of biochemical properties (molecular weight, isoelectric point).
  • Antimicrobial activity testing against a panel of pathogens.
  • In vivo therapeutic trials in broiler chickens.

Main Results:

  • Enterococcus faecium (NRRL B-30746) produced a Class IIa bacteriocin, E 50-52.
  • Bacteriocin E 50-52 exhibited broad-spectrum activity against Gram-negative and Gram-positive pathogens.
  • Minimal inhibitory concentrations ranged from 0.025 to 32 microg/mL.
  • Oral administration of E 50-52 significantly reduced Campylobacter jejuni and Salmonella enteritidis in broiler ceca, liver, and spleen.

Conclusions:

  • Bacteriocin E 50-52 is a potent antimicrobial agent with broad-spectrum activity.
  • E 50-52 demonstrates significant therapeutic potential in reducing enteric pathogens in poultry.
  • This bacteriocin represents a promising natural alternative to conventional antibiotics.