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Related Experiment Videos

Abdominal radiation causes bacterial translocation.

G Guzman-Stein1, M Bonsack, J Liberty

  • 1University of Minnesota Medical School, Minneapolis 55455.

The Journal of Surgical Research
|February 1, 1989
PubMed
Summary

A single dose of abdominal radiation in rats caused significant bacterial translocation into mesenteric lymph nodes (MLN). This translocation occurred before observable mucosal damage, suggesting radiation

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Area of Science:

  • Gastrointestinal radiation biology
  • Microbiology
  • Surgical research

Background:

  • Radiation therapy can impact the gastrointestinal tract.
  • Bacterial translocation is a potential complication of abdominal insults.

Purpose of the Study:

  • To investigate if abdominal radiation induces bacterial translocation into mesenteric lymph nodes (MLN).
  • To determine if bacterial translocation correlates with mucosal damage post-radiation.

Main Methods:

  • Rats received a single dose of abdominal radiation (1100 cGy) or anesthesia only.
  • Mesenteric lymph nodes (MLN) were cultured for bacteria at various time points.
  • Intestinal mucosa was examined for signs of damage.

Main Results:

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  • 100% of radiated rats showed positive MLN cultures between 12 hours and 4 days post-radiation.
  • Bacterial translocation was minimal in control and anesthesia-only groups.
  • Mucosal inflammation and ulceration were observed starting on Day 3, peaking by Day 4.

Conclusions:

  • Abdominal radiation significantly increases bacterial translocation into MLN in rats.
  • Bacterial translocation occurred independently of observable anatomical or histological mucosal damage.
  • Radiation-induced bacterial translocation may precede detectable mucosal injury.