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Related Experiment Videos

The process of microbial translocation.

J W Alexander1, S T Boyce, G F Babcock

  • 1Department of Surgery, University of Cincinnati College of Medicine, OH 45267-0558.

Annals of Surgery
|October 1, 1990
PubMed
Summary
This summary is machine-generated.

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Microbial translocation occurs through direct enterocyte penetration, not between cells. This process, observed with Candida albicans and E. coli, offers new insights into intestinal immune responses.

Area of Science:

  • Microbiology
  • Immunology
  • Gastroenterology

Background:

  • Microbial translocation is a critical factor in systemic infections.
  • Understanding the precise mechanisms of microbial entry into host tissues is essential.

Purpose of the Study:

  • To investigate the translocation process of Candida albicans, Escherichia coli, and endotoxin across the intestinal barrier.
  • To elucidate the role of enterocytes and intestinal immune cells in microbial translocation.

Main Methods:

  • Utilized Thiry-Vella loops in thermally injured guinea pigs and rats.
  • Instilled Candida albicans, Escherichia coli, or endotoxin into the loops.
  • Observed translocation mechanisms using microscopy and histological analysis.

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Main Results:

  • Candida albicans translocated via direct enterocyte penetration, distinct from phagocytosis, disrupting cellular membranes.
  • Escherichia coli and endotoxin also translocated directly through enterocytes.
  • Endotoxin diffused between myocytes, while organisms were found in lamina propria, lymphatics, and blood vessels, with macrophages participating in clearance.

Conclusions:

  • Microbial translocation occurs primarily through direct enterocyte passage, not paracellular routes.
  • Enterocyte integrity and intestinal immune cells play crucial roles in managing microbial translocation.
  • These findings provide novel insights into host-pathogen interactions at the intestinal barrier.