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Related Experiment Videos

Proteus dysbioses in patients with ulcerative colitis.

S K Kanareykina1, A A Misautova, A R Zlatkina

  • 1Scientific Clinical Research Institute M.F. Vladimirski, Moscow, USSR.

Die Nahrung
|January 1, 1987
PubMed
Summary

Proteus bacteria were found throughout the digestive tract in ulcerative colitis patients, causing dysbiosis and malabsorption. Vaccinal therapy improved symptoms, indicating Proteus

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Area of Science:

  • Microbiology
  • Gastroenterology
  • Immunology

Background:

  • Ulcerative colitis (UC) is a chronic inflammatory bowel disease.
  • The role of specific bacterial species, like Proteus, in UC pathogenesis is under investigation.

Purpose of the Study:

  • To investigate the presence and impact of Proteus in the gastrointestinal tract of UC patients.
  • To evaluate the efficacy of vaccinal therapy in managing Proteus-associated dysbiosis and malabsorption in UC.

Main Methods:

  • Bacterial isolation and identification from various gastrointestinal sites (mouth, stomach, intestines, feces).
  • Assessment of polysaccharide hydrolysis and small intestinal absorption.
  • Virulence studies in a mouse model.
  • Clinical evaluation of patients undergoing vaccinal therapy.

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Main Results:

  • Proteus was isolated from all gastrointestinal segments, predominantly in feces of UC patients.
  • Severe Proteus dysbiosis correlated with reduced small intestinal absorption and impaired polysaccharide hydrolysis.
  • Proteus strains belonged to serogroups OA, OB, and OC.
  • Experimental studies showed high virulence of Proteus strains in mice; no enterotoxin was detected.
  • Vaccinal therapy led to improved malabsorption, weight gain, normalized stools, and better hematological indices.

Conclusions:

  • Proteus plays a significant role in the gastrointestinal dysbiosis observed in ulcerative colitis.
  • Proteus-associated malabsorption and associated symptoms can be effectively managed with vaccinal therapy.