Related Experiment Video
Updated: Jan 2, 2026
09:21
A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study Clostridium Perfringens Virulence
Published on: October 11, 2018
9.8K
[Development of animal experimental model for bacterial peritonitis]
O Montenegro, S Illescas, J C González
1Fco Javier Redondo Calvo, Servicio de Anestesilogía y Reanimación. Unidad de Investigación Traslacional. Hospital General Universitario de Ciudad Real. C/Obispo General Torija s/n.13005. Ciudad Real. Spain. fjredondo@sescam.jccm.es.
Summary
This study established an animal model for abdominal sepsis using Escherichia coli (E. coli) in rats. The lethal dose was determined to be 10E10 colony-forming units (CFU) of E. coli diluted in 15 cc of distilled water.
Area of Science:
- Microbiology
- Animal Models
- Sepsis Research
Background:
- Abdominal sepsis is a critical condition requiring effective treatment strategies.
- Developing reliable experimental models is crucial for understanding sepsis pathogenesis and evaluating therapies.
Purpose of the Study:
- To develop and validate an experimental animal model for abdominal sepsis.
- To determine the lethal dose of *Escherichia coli* (E. coli) in Sprague-Dawley rats.
- To provide a foundation for future studies on sepsis treatment.
Main Methods:
- Sprague-Dawley male rats (N=39) were used to establish an abdominal sepsis model.
- Intraperitoneal inoculation with *E. coli* ATCC 25922 at varying concentrations (10E8 to 10E10 CFU) and dilutions was performed.
- Treatment groups received physiological serum, ceftriaxone, or ceftriaxone plus allicin, followed by microbiological and histopathological analyses.
Main Results:
- A 100% mortality rate was observed in rats infected with 10E10 CFU/*E. coli* diluted in 15 cc distilled water without antibiotic treatment.
- Blood and peritoneal fluid cultures confirmed *E. coli* presence in all infected animals.
- Histopathology revealed liver abscess formation and polymorphonuclear infiltration.
Conclusions:
- The lethal dose of *E. coli* for inducing abdominal sepsis in this model is 10E10 CFU diluted in 15 cc of distilled water via intraperitoneal injection.
- This model effectively replicates key features of abdominal sepsis, including mortality and pathological changes.
- The findings provide a basis for further research into therapeutic interventions for sepsis.
