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[Pathogenic properties of Yersinia pseudotuberculosis in different biological models]
Abstract:
The study of the action of Y. pseudotuberculosis introduced into the cavity of the ligated intestinal loop of a rabbit, into the stomach of 2- to 4-day-old suckling mice or injected intradermally has made it possible to establish the importance of the invasive and toxic activity of this microbe in the pathogenesis of pseudotuberculosis infection. The lesion of the small intestine develops due to the penetration of the bacteria into the mucous membrane and the combined action of the microbial cells inhabiting the stroma, and secreting into the environment of cytotoxins, toxic substances with an enterotropic action or enterotoxins and factors increasing the permeability of the vessels. Y. pseudotuberculosis strains with high and low invasiveness have been isolated.
Insights
This study highlights the critical roles of invasiveness and toxicity of Yersinia pseudotuberculosis in causing pseudotuberculosis infection. Bacterial entry into the intestinal lining and the release of toxins contribute to disease development.
Area of Science:
- Microbiology
- Pathogenesis
- Infectious Diseases
Background:
- Yersinia pseudotuberculosis is a pathogen causing pseudotuberculosis.
- Understanding its pathogenic mechanisms is crucial for disease control.
Purpose of the Study:
- To investigate the roles of invasiveness and toxicity of Y. pseudotuberculosis in disease pathogenesis.
- To elucidate the mechanisms of small intestine lesion development.
Main Methods:
- Infection models using ligated intestinal loops in rabbits.
- Oral administration to suckling mice.
- Intradermal injection in animal models.
Main Results:
- Established the importance of bacterial invasiveness and toxic activity in pseudotuberculosis.
- Demonstrated that small intestine lesions result from bacterial penetration and toxin secretion.
- Isolated Y. pseudotuberculosis strains exhibiting high and low invasiveness.
Conclusions:
- Bacterial invasion of the intestinal mucosa and the action of secreted toxins are key factors in pseudotuberculosis pathogenesis.
- Y. pseudotuberculosis employs invasiveness and enterotropic toxins to cause intestinal damage.
- Strain variability in invasiveness influences disease severity.