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[Changes within Lactobacillus and Bifidobacterium species].

W Müller-Beuthow1, F K Grütte, H Haenel

  • 1Zentralinstitut für Ernährung in Potsdam-Rehbrücke, Akademie der Wissenschaften der DDR.

Die Nahrung
|January 1, 1987
PubMed
Summary

A lactose-rich diet introduced Lactobacillus plantarum in germ-free rats, followed by Bifidobacterium species like B. adolescentis and B. infantis. This study tracks gut flora shifts after dietary intervention.

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Area of Science:

  • Microbiology
  • Gastroenterology
  • Animal Science

Background:

  • Gut microbiota plays a crucial role in host health.
  • Bifidobacterium species are important commensal bacteria, particularly in infants.
  • Understanding microbial succession is key to gut health research.

Purpose of the Study:

  • To investigate the colonization dynamics of gut bacteria in germ-free rats.
  • To observe the impact of a lactose-rich diet on gut flora composition.
  • To characterize the sequential emergence and dominance of Bifidobacterium species.

Main Methods:

  • Germ-free laboratory rats were fed a lactose-rich diet.
  • Fecal samples were analyzed over time to identify bacterial species.
  • In vitro cultivation was used to study Bifidobacterium species adaptation.

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Main Results:

  • Lactobacillus plantarum initially dominated the gut flora.
  • Bifidobacterium species, including B. adolescentis and B. pseudolongum, were detected subsequently.
  • B. bifidum and B. infantis later became dominant, mirroring adult gut flora patterns.
  • In vitro experiments showed slow adaptation of Bifidobacterium species to adult-like fecal conditions.

Conclusions:

  • Dietary interventions can significantly alter gut microbiota composition.
  • The study demonstrates a specific microbial succession pattern in rats.
  • Bifidobacterium species exhibit distinct colonization and adaptation characteristics influenced by diet and time.