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Aggregation-promoting factor in pig intestinal Lactobacillus strains

V Kmet1, M L Callegari, V Bottazzi

  • 1Institute of Animal Physiology, Slovak Academy of Sciences, Kosice, Slovakia.

Letters in Applied Microbiology
|December 1, 1995
PubMed
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Intestinal lactobacilli from weaned pigs showed autoaggregation due to a protein factor. This protein in Lactobacillus reuteri strains was identified and showed coaggregation with Escherichia coli.

Area of Science:

  • Microbiology
  • Animal Science
  • Biochemistry

Background:

  • Autoaggregation is common in intestinal lactobacilli from weaned pigs.
  • The mechanism of aggregation in some strains involves a proteinaceous factor.

Purpose of the Study:

  • To investigate the mechanism of autoaggregation in intestinal lactobacilli from weaned pigs.
  • To identify the aggregation-promoting factor in specific Lactobacillus reuteri strains.

Main Methods:

  • Isolation and characterization of intestinal lactobacilli from weaned pigs.
  • Detection of aggregation-promoting protein using cross-reaction with specific antibodies.
  • Assessment of coaggregation reactions with Escherichia coli strains.

Main Results:

Related Experiment Videos

  • Two strains of Lactobacillus reuteri exhibited autoaggregation mediated by a protein factor.
  • A 32 kDa aggregation-promoting protein was identified in these strains.
  • Lactobacillus reuteri strains showed coaggregation with both pathogenic and non-pathogenic Escherichia coli.

Conclusions:

  • A proteinaceous factor mediates autoaggregation in specific Lactobacillus reuteri strains from pigs.
  • The identified protein may play a role in the interaction of lactobacilli with other gut bacteria, including Escherichia coli.