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Related Concept Videos

Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
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Pet Pyometra: Correlating Bacteria Pathogenicity to Endometrial Histological Changes.

Cassiane Elisabete Lopes1, Silvia De Carli1, Camila Imperico Riboldi1

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Pyometra in pets is linked to severe endometrial damage, with Escherichia coli (E. coli) frequently identified as the cause. This study correlates E. coli

Keywords:
EnPECbacteria isolationcompanion animalshistopathologyuterus infectionvirulence genes

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Area of Science:

  • Veterinary Pathology
  • Microbiology
  • Animal Infectious Diseases

Background:

  • Pyometra is a serious uterine infection in female dogs and cats.
  • Histopathology of pyometra is well-documented, but bacterial virulence factors haven't been linked to endometrial damage.
  • Understanding the relationship between specific bacteria and uterine lesions is crucial for effective treatment.

Purpose of the Study:

  • To correlate histopathological endometrial lesions with microbiological findings in pyometra cases.
  • To investigate the pathogenicity and virulence of bacterial isolates from pyometra.
  • To identify the primary bacterial agent responsible for severe endometrial damage in pyometra.

Main Methods:

  • Collected uterus and intrauterine samples from 30 pyometra-affected pets.
  • Performed histopathological analysis of endometrial tissues.
  • Conducted bacterial culture and identification, including virulence factor assessment and immunohistochemistry for E. coli.

Main Results:

  • Identified 30 bacterial isolates; Escherichia coli (E. coli) was the most frequent isolate (57.7%).
  • E. coli was strongly associated with severe endometrial histopathological lesions.
  • Immunohistochemistry confirmed E. coli adhesion and invasion of injured endometrium; isolates showed biofilm formation and virulence genes.

Conclusions:

  • E. coli possesses genetic and phenotypic traits advantageous for uterine infection.
  • The virulence of E. coli explains its high prevalence and association with severe endometrial damage in pyometra.
  • This study establishes a direct link between E. coli pathogenicity and pyometra severity.