Animal models for intra-abdominal infection

Area of Science:

• Microbiology
• Infectious Diseases
• Animal Modeling

Background:

• Intra-abdominal infections (IAIs) are frequently studied using animal models.
• IAIs present a biphasic progression: an initial peritonitis (septic phase) often induced by *E. coli*, followed by a chronic abscess-forming stage typically involving *B. fragilis*.
• This biphasic nature mirrors human intra-abdominal infections.

Purpose of the Study:

• To review and discuss various animal models used for experimental intra-abdominal infections.
• To highlight the advantages and disadvantages of different modeling approaches.
• To emphasize the criteria for selecting an appropriate model for specific research objectives.

Main Methods:

• Review of established methods for creating experimental intra-abdominal infections in animals.
• Methods include peritoneal challenge with endogenous bacteria, pure bacterial inoculation, or fecal material.
• Discussion of non-bacterial models and their utility.

Main Results:

• Multiple animal models exist, each with inherent strengths and weaknesses.
• Current models vary in their reliability, standardization, reproducibility, and fidelity to human disease progression.
• No single existing model fully meets all ideal criteria for studying both phases of intra-abdominal infections.

Conclusions:

• Model selection for experimental intra-abdominal infections should be guided by the specific research aims and desired endpoints.
• The ideal animal model should be reliable, standardized, reproducible, and accurately mimic human disease.
• Further development is needed to create a single, comprehensive animal model for intra-abdominal infections.